COMMONWEALTH ENERGY SYSTEM
10-K405, 1998-03-31
ELECTRIC & OTHER SERVICES COMBINED
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<PAGE 1>


                UNITED STATES SECURITIES AND EXCHANGE COMMISSION
                         Washington, D. C. 20549-1004

                                   Form 10-K

                 ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d)
                    OF THE SECURITIES EXCHANGE ACT OF 1934

(Mark One)
[ X ]  ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
       EXCHANGE ACT OF 1934

       For the fiscal year ended December 31, 1997

                                      OR

[   ]  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
       EXCHANGE ACT OF 1934

       For the transition period from ________________ to ________________

                         Commission file number 1-7316

                            COMMONWEALTH ENERGY SYSTEM                   
      (Exact name of registrant as specified in its Declaration of Trust)

        Massachusetts                                         04-1662010     
(State or other jurisdiction of                           (I.R.S. Employer
incorporation or organization)                           Identification No.)

One Main Street, Cambridge, Massachusetts                    02142-9150
(Address of principal executive offices)                     (Zip Code)

                               (617) 225-4000                    
             (Registrant's telephone number, including area code)

          Securities registered pursuant to Section 12(b) of the Act:

     Title of each class       Name of each exchange on which registered
Common Shares of Beneficial          New York Stock Exchange, Inc.
   Interest $2 par value             Pacific Exchange, Inc.

          Securities registered pursuant to Section 12(g) of the Act:

                                Title of Class
                                     None

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405
of Regulation S-K is not contained herein, and will not be contained, to the
best of registrant's knowledge, in definitive proxy or information statements
incorporated by reference in Part III of this Form 10-K or any amendment to
this Form 10-K. [ x ]

Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports) and (2) has been subject to such
filing requirements for the past 90 days. YES [ x ] NO [   ]

Aggregate market value of the voting stock held by non-affiliates of the
registrant as of March 16, 1998:  $789,947,326

Common Shares outstanding at March 16, 1998:  21,531,784 shares

Document Incorporated by Reference               Part in Form 10-K

Notice of 1998 Annual Meeting and
Proxy Statement, dated March 30, 1998
(pages as specified herein)                      Part III

              List of Exhibits begins on page 55 of this report.
<PAGE 2>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

                               TABLE OF CONTENTS

                                    PART I
                                                                  PAGE
Item   1. Business...............................................   3
             General.............................................   3
             Electric Power Supply...............................   4
             Power Supply Commitments and Support Agreements.....   7
             Electric Fuel Supply................................   7
             Nuclear Fuel Supply and Disposal....................   8
             Gas Supply..........................................   8
             Rates, Regulation and Legislation...................   9
             Competition.........................................  14
             Segment Information.................................  14
             Environmental Matters...............................  14
             Construction and Financing..........................  15
             Employees...........................................  15

Item  2.  Properties.............................................  15

Item  3.  Legal Proceedings......................................  16

Item  4.  Submission of Matters to a Vote of Security Holders....  16

                                    PART II
Item  5.  Market for the Registrant's Securities and Related
          Stockholder Matters....................................  17

Item  6.  Selected Financial Data................................  18

Item  7.  Management's Discussion and Analysis of Financial
          Condition and Results of Operations....................  19

Item  8.  Financial Statements and Supplementary Data............  28

Item  9.  Changes in and Disagreements with Accountants on
          Accounting and Financial Disclosure....................  28

                                   PART III
Item 10.  Trustees and Executive Officers of the Registrant......  52

Item 11.  Executive Compensation.................................  53

Item 12.  Security Ownership of Certain Beneficial Owners and
          Management.............................................  53

Item 13.  Certain Relationships and Related Transactions.........  54

                                    PART IV
Item 14.  Exhibits, Financial Statement Schedules and Reports
          on Form 8-K............................................  54

Signatures........................................................ 72

<PAGE 3>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

                                    PART I.

Item 1.     Business

      General

      Commonwealth Energy System, a Massachusetts trust, is an unincorporated
business organization with transferable shares.  It is organized under a
Declaration of Trust dated December 31, 1926, as amended, pursuant to the laws
of Massachusetts.  It is an exempt public utility holding company under the
provisions of the Public Utility Holding Company Act of 1935, holding all of
the stock of four operating public utility companies.  Commonwealth Energy
System, the parent company, is referred to in this report as the "System" and,
together with its subsidiaries, is collectively referred to as "the system."

      The operating utility subsidiaries of the System are engaged in the
generation, transmission and distribution of electricity and the distribution
of natural gas, all within Massachusetts.  These subsidiaries are:

              Electric                                    Gas

     Cambridge Electric Light Company          Commonwealth Gas Company
     Canal Electric Company
     Commonwealth Electric Company

      In addition to the utility companies, the System also owns all of the
stock of a steam distribution company (COM/Energy Steam Company), five real
estate trusts, a liquefied natural gas (LNG) and vaporization facility
(Hopkinton LNG Corp.) and three new subsidiaries that are pursuing energy-
related business opportunities.  Subsidiaries of the System receive technical
assistance as well as financial, data processing, accounting, legal and other
services from a wholly-owned services company subsidiary (COM/Energy Services
Company).

      The five real estate subsidiaries are: Darvel Realty Trust, which is a
joint-owner of the Riverfront Office Park complex in Cambridge; COM/Energy
Acushnet Realty, which leases land to Hopkinton LNG Corp. (Hopkinton);
COM/Energy Research Park Realty, which was organized to develop a research
building in Cambridge; COM/Energy Cambridge Realty, which was organized to
hold various properties; and COM/Energy Freetown Realty (Freetown), which
holds 596 acres of land in Freetown, Massachusetts.  Advanced Energy Systems,
Inc. (formerly COM/Energy Enterprises, Inc.), together with two new
subsidiaries formed during 1997, COM/Energy Marketing, Inc. and COM/Energy
Technologies, Inc., were established to pursue business opportunities created
by the restructuring of the electric and gas industries and the emergence of
new energy technologies.

      Each of the operating utility subsidiaries serves retail customers
except for Canal Electric Company (Canal) which operates an electric
generating station located in Sandwich, Massachusetts.  The station consists
of Canal Unit 1, an oil-fired steam electric generating unit that is wholly-
owned by Canal and has a rated capacity of 569 MW, and Canal Unit 2, a steam
electric generating unit that was converted to dual-fuel capability (oil and
natural gas) in 1996 that is jointly-owned by Canal and Montaup Electric
Company (Montaup) (an unaffiliated company) and has a rated capacity of
<PAGE 4>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

580 MW.  Canal Unit 2 is operated under an agreement with Montaup which
provides for the equal sharing of output, fixed charges and operating
expenses.

      Electric service is furnished by Cambridge Electric Light Company (Cam-
bridge Electric) and Commonwealth Electric Company (Commonwealth Electric) at
retail to approximately 321,000 year-round and 46,100 seasonal customers in 41
communities in eastern and southeastern Massachusetts covering 1,112 square
miles and having an aggregate population of 645,000.  The territory served
includes the communities of Cambridge, New Bedford and Plymouth and the
geographic area comprising Cape Cod and Martha's Vineyard.  In early 1997,
Cambridge Electric and Commonwealth Electric received approval to participate
as a broker in the purchase and sale of electricity.  Cambridge Electric also
sells power at wholesale to the Town of Belmont, Massachusetts.

      Natural gas is distributed by Commonwealth Gas Company (Commonwealth
Gas) to approximately 237,000 customers in 49 communities in central and
eastern Massachusetts covering 1,067 square miles and having an aggregate
population of 1,128,000.  Twelve of these communities are also served by
system companies with electricity.  Some of the larger communities served by
Commonwealth Gas include Cambridge, Somerville, New Bedford, Plymouth,
Worcester, Framingham, Dedham and the Hyde Park area of Boston.

      Steam, which is produced by Cambridge Electric in connection with the
generation of electricity, is purchased by COM/Energy Steam and, together with
its own production, is distributed to 19 customers in Cambridge and two
customers (including Massachusetts General Hospital) in Boston.  Steam is used
for space heating and other purposes.

      Industry in the territories served by system companies is highly
diversified.  The larger industrial customers include high-technology firms
and manufacturers of such products as photographic equipment and supplies,
computer diskettes, rubber products, textiles, wire and other fastening
devices, abrasives and grinding wheels, candy, copper and alloys, and
chemicals.

      Electric Power Supply

      To satisfy demand requirements and provide required reserve capacity,
the system supplements its generating capacity by purchasing power on a long
and short-term basis through capacity entitlements under power contracts with
other New England and Canadian utilities and with Qualifying Facilities and
other non-utility generators through a competitive bidding process that is
regulated by the Massachusetts Department of Telecommunications and Energy
(DTE) (formerly the Massachusetts Department of Public Utilities (DPU)).

      System companies own generating facilities with a net capability at the
time of peak load (974 MW on July 18, 1997) totaling 1,017.7 MW including 569
MW provided by Canal Unit 1, of which three-quarters (426.8 MW) is sold to
neighboring utilities under long-term contracts, and 290 MW provided by Canal
Unit 2.  Another 126.3 MW is provided by various smaller system units.  Of the
558.5 MW available to the system, 63.3 MW are used principally for peaking
purposes.  A 3.52% ownership interest in the Seabrook 1 nuclear power plant
provides 40.5 MW of capability to the system and Central Maine Power Company's
<PAGE 5>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

Wyman Unit 4, an oil-fired facility in which the system has a 1.4% joint-
ownership interest, provides 8.8 MW.  Additionally, in 1993, Canal extended an
agreement with New England Power Company (NEP) whereby 50 MW of Canal Unit 2
(previously 20 MW) is exchanged for 50 MW of Bear Swamp Unit Nos. 1 and 2
through April 1997.  The Bear Swamp Units are pumped storage hydroelectric
generating facilities.  These contracts are designed to reduce the system's
reliance on oil.

      In addition, through Canal's equity ownership in Hydro-Quebec Phase II,
the system has an entitlement of 67.8 MW.  Purchase power arrangements were
also in place with four natural gas-fired cogenerating units in Massachusetts
totaling 205.2 MW.  The system also receives 67 MW from a waste-to-energy
plant and has entitlements totaling 23.9 MW through contracts with four
hydroelectric suppliers.

      Pursuant to a restructured Power Sale Agreement (PSA), effective January
1, 1995, a non-utility generator (NUG) ceased supplying capacity and energy to
the system.  The restructured PSA defers the system's obligation to purchase
the NUG's capacity and energy for a maximum of six years.  In addition, on
January 27, 1995, the DTE approved the buy-out of a PSA between Commonwealth
Electric and another NUG, effective April 12, 1995.  This buy-out is expected
to save Commonwealth Electric's customers approximately $37 million over the
next 20 years.  A purchased power obligation with another NUG was terminated
in June 1996 and is expected to save Commonwealth Electric's customers an
additional $34 million over the twenty-year life of the original agreement.

      The system also has available 84.4 MW from two operating nuclear units
in which system distribution companies have life-of-the-unit contracts for
power.  Information with respect to these units is as follows:

                                       Vermont
                                        Yankee  Pilgrim

Year of Initial Operation                1972     1972
Contract Expiration Date                 2012     2012
Equity Ownership (%)                     2.50      -
Plant Entitlement (%)                    2.25     11.0
Plant Capability (MW)                   496.0    664.7
System Entitlement (MW)                  11.2     73.2

      Information relative to nuclear units that are no longer operating in
which the system has an equity ownership is as follows:

                                          Connecticut    Maine     Yankee
                                             Yankee      Yankee    Atomic
                                               (Dollars in thousands)

Year of Shutdown                               1996       1997       1992
Equity Ownership (%)                           4.50       4.00       4.50
Equity Ownership Balance                     $5,007     $3,121       $405

For additional information, refer to Note 3(d) of the Notes to Consolidated
Financial Statements filed under Item 8 of this report.


<PAGE 6>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

      The system's non-nuclear generating assets together with capacity
entitlements associated with power contracts previously discussed and as
further discussed later in this section are part of an ongoing auction process
initiated during 1997 in response to electric industry restructuring
legislation enacted in Massachusetts in November 1997.  The auction process is
expected to be completed in 1998.  For further information refer to the
"Industry Restructuring" section of Management's Discussion and Analysis of
Financial Condition and Results of Operations filed under Item 7 of this
report.

      Cambridge Electric, Canal and Commonwealth Electric, together with
other electric utility companies in the New England area, are members of
Independent System Operator (ISO) - New England (formerly the New England
Power Pool or NEPOOL), which was formed in 1971 to provide for the joint
planning and operation of electric systems throughout New England.

      ISO - New England operates a centralized dispatching facility to ensure
reliability of service and to dispatch the most economically available
generating units of the member companies to fulfill the region's energy
requirements.  This concept is accomplished by use of computers to monitor and
forecast load requirements.

      ISO - New England, on behalf of its members entered into an
Interconnection Agreement with Hydro-Quebec, a Canadian utility operating in
the Province of Quebec.  The agreement provided for construction of an
interconnection (referred to as the Hydro-Quebec Project-Phase I and Phase II)
between the electrical systems of New England and Quebec.  The parties have
also entered into an Energy Contract and an Energy Banking Agreement; the
former obligates Hydro-Quebec to offer ISO - New England participants up to 33
million MWH of surplus energy during an eleven-year term that began September
1, 1986 and the latter provides for energy transfers between the two systems. 
ISO - New England has also entered into Phase II agreements for an additional
purchase from Hydro-Quebec of 7 million MWH per year for a twenty-five year
period which began in late 1990.

      Canal is obligated to pay its share of operating and capital costs for
Phase II over a 25 year period ending in 2015.  Future minimum lease payments
for Phase II have an estimated present value of $11.8 million at December 31,
1997.  In addition, Canal has an equity interest in Phase II which amounted to
$3.1 million in 1997 and $3.3 million in 1996.

      The System's electric subsidiaries are also members of the Northeast
Power Coordinating Council (NPCC), an advisory organization that includes the
major power systems in New England and New York plus the Provinces of Ontario
and New Brunswick in Canada.  NPCC establishes criteria and standards for
reliability and serves as a vehicle for coordination in the planning and
operation of these systems.

      The reserve requirements used by the ISO - New England participants in
planning future additions are determined by ISO - New England to meet the
reliability criteria recommended by the NPCC.  The system estimates that,
during the next ten years, reserve requirements so determined will be
approximately 20% of peak load.


<PAGE 7>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

      Power Supply Commitments and Support Agreements

      Cambridge Electric and Commonwealth Electric, through Canal, secure
cost savings for their respective customers by planning for bulk power supply
on a single system basis.  Additionally, Cambridge Electric and Commonwealth
Electric have long-term contracts for the purchase of electricity from various
sources.  Generally, these contracts are for fixed periods and require payment
of a demand charge for the capacity entitlement and an energy charge to cover
the cost of fuel.  For additional information concerning system commitments
under long-term power contracts, refer to Note 3(d) of Notes to Consolidated
Financial Statements filed under Item 8 of this report.

      The system's 3.52% interest in the Seabrook nuclear power plant is
owned by Canal to provide for a portion of the capacity and energy needs of
Cambridge Electric and Commonwealth Electric.  For additional information
concerning Seabrook 1, refer to Note 3(b) of Notes to Consolidated Financial
Statements filed under Item 8 of this report.

      Electric Fuel Supply

      (a) Oil and Natural Gas

      Of the system's total energy requirement for 1997, approximately 42%
was generated using imported residual oil and approximately 32% was generated
using natural gas.

      Effective March 15, 1998, Canal executed a one-year contract with
Coastal Refining and Marketing, Inc. (Coastal) for the purchase of 1% sulfur
residual fuel oil.  The contract provides for delivery of a set percentage of
Canal's fuel requirement, the balance (a maximum of 50%) to be met by spot
purchases or by Coastal at the discretion of Canal.

      Energy Supply & Credit Corporation (ESCO Massachusetts, Inc.) operates
Canal's fuel oil terminal and manages the receipt of and payment for fuel oil
under assignment of Canal's supply contracts to ESCO Massachusetts, Inc. 
Residual fuel oil in the terminal's shore tanks is held in inventory by ESCO
Massachusetts, Inc. and delivered upon demand to Canal's two day tanks.

      Fuel oil storage facilities at the Canal site have a capacity of
1,199,000 barrels, representing approximately 60 days of normal operation of
the two units.  During 1997, ESCO Massachusetts, Inc. maintained an average
daily inventory of 395,000 barrels of fuel oil which represents 18 days of
normal operation of the two units.  This supply is maintained by tanker
deliveries.

      During 1996, Unit 2 was converted to dual-fuel capability, residual
fuel oil and natural gas.  Unit 2 has burned approximately 2.5 million MMBTU's
of natural gas since the conversion was completed during periods when the use
of natural gas was the most economical choice.  Canal anticipates that its
dual-fuel capability will result in future savings as the least expensive fuel
is utilized.
<PAGE 8>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

      Canal has a gas supply contract with PGE Energy Trading Corporation to
provide 100% of the natural gas requirements of Unit 2 through October 31,
1998.  Canal's original gas supply contract with Duke/Louis Dreyfus, L.L.C.
expired on December 31, 1997.

      (b) Nuclear Fuel Supply and Disposal

      Approximately 13% of the system's total energy requirement for 1997 was
generated by nuclear plants.  The nuclear fuel contract and inventory
information for Seabrook 1 has been furnished to the system by North Atlantic
Energy Services Corporation (NAESCO), the plant manager responsible for
operation of the unit.  Seabrook's requirement for nuclear fuel components are
100% covered through 1999 by existing contracts.

      There are no spent fuel reprocessing or disposal facilities currently
operating in the United States.  Instead, commercial nuclear electric gener-
ating units operating in the United States are required to retain spent fuel
on-site.  As required by the Nuclear Waste Policy Act of 1982 (the Act), as
amended, the joint-owners entered into a contract with the Department of
Energy for the transportation and disposal of spent fuel and high level
radioactive waste at a national nuclear waste repository or Monitored
Retrievable Storage (MRS) facility.  Owners or generators of spent nuclear
fuel or its associated wastes are required to bear the costs for such
transportation and disposal through payment of a fee of approximately 1
mill/KWH based on net electric generation to the Nuclear Waste Fund.  Under
the Act, a storage or disposal facility for nuclear waste was anticipated to
be in operation by 1998; a reassessment of the project's schedule requires
extending the completion date of the permanent facility until at least 2010. 
Seabrook 1 is currently licensed for enough on-site storage to accommodate
spent fuel expected to be accumulated through at least the year 2010.

      Gas Supply

      Commonwealth Gas purchases transportation, storage and balancing
services from Tennessee Gas Pipeline Company (Tennessee) and Algonquin Gas
Transmission Company (and other upstream pipelines that bring gas from the
supply wells to the final transporting pipelines) and purchases all of its gas
supplies from third-party vendors, utilizing firm contracts with terms of less
than one year.  The vendors vary from small independent marketers to major gas
and oil companies.

      In addition to firm transportation and gas supplies mentioned above,
Commonwealth Gas utilizes contracts for underground storage and LNG facilities
to meet its winter peaking demands.  The underground storage contracts are a
combination of existing and new agreements which are the result of Federal
Energy Regulatory Commission (FERC) Order 636 service unbundling.  The LNG
facilities, described below, are used to liquefy and store pipeline gas during
the warmer months for use during the heating season.

      Commonwealth Gas entered into a multi-party agreement in 1992 to assume
a portion of Boston Gas Company's contracts to purchase Canadian gas supplies
from Alberta Northeast (ANE) and have the volumes delivered by the Iroquois
Gas Transmission System and Tennessee pipelines.  The ANE gas supply contract
was filed with the DTE and hearings were completed in April 1993.  The DTE
approved the ANE gas supply contract in November 1995.  Commonwealth Gas is
<PAGE 9>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

presently in negotiations with the parties to allow for final execution of all
pertinent agreements and contracts.

      Commonwealth Gas began transporting gas on its distribution system in
1990 for end-users.  As of December 31, 1997, there were 218 customers using
this transportation service, accounting for 8,462 BBTU or approximately 16% of
total throughput.

      Hopkinton LNG Facility

      A portion of the gas supply for Commonwealth Gas during the heating
season is provided by Hopkinton LNG Corp. (Hopkinton), a wholly-owned
subsidiary of the System.  The facility consists of a liquefaction and
vaporization plant and three above-ground cryogenic storage tanks having an
aggregate capacity of 3 million MCF of natural gas.

      In addition, Hopkinton owns a satellite vaporization plant and two
above-ground cryogenic storage tanks located in Acushnet, Massachusetts with
an aggregate capacity of 500,000 MCF of natural gas that are filled with LNG
trucked from Hopkinton.

      Commonwealth Gas has contracts for LNG service with Hopkinton extending
on a year to year basis with notice of termination required five years in
advance of the anticipated termination date.  Commonwealth Gas and Hopkinton
are currently evaluating the contracts to determine if amendments to the
contracts should be negotiated in light of the ongoing deregulation of the
natural gas industry.  Current contract payments include a demand charge
sufficient to cover Hopkinton's fixed charges and an operating charge which
covers liquefaction and vaporization expenses.  Commonwealth Gas furnishes
pipeline gas during the period April 15 to November 15 each year for
liquefaction and storage.  As the need arises, LNG is vaporized and placed in
the distribution system of Commonwealth Gas.

      Based upon information presently available regarding projected growth
in demand and estimates of availability of future supplies of pipeline gas,
Commonwealth Gas believes that its present sources of gas supply are adequate
to meet existing load and allow for future growth in sales.

      Rates, Regulation and Legislation

      Certain of the System's utility subsidiaries operate under the
jurisdiction of the DTE which regulates retail rates, accounting, issuance of
securities and other matters.  In addition, Canal, Cambridge Electric and
Commonwealth Electric file their respective wholesale rates with the FERC.  

      (a) Restructuring Legislation

      As more fully discussed in the "Industry Restructuring" section of
Management's Discussion and Analysis of Results of Operations in Item 7 of
this report, the system began to implement the provisions of the Electric
Industry Restructuring Act on March 1, 1998 as signed into law on November 25,
1997 following the Company's filing of its proposed restructuring plan with
the DTE on November 19, 1997.  A modified plan was approved by the DTE on
February 27, 1998 prior to implementation on March 1, 1998.  Also discussed is
the movement initiated by the DTE in July 1997 to unbundle rates and services
for all gas customers.
<PAGE 10>
              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

      (b) Wholesale Rate Proceedings

      Cambridge Electric provides power supply and transmission services to
its FERC-jurisdictional wholesale customers.  Cambridge Electric requires FERC
approval to change its wholesale rates, including those to the Municipal Light
Department of the Town of Belmont, Massachusetts (Belmont), a "partial
requirements" customer since 1986.  Since February 1993, Belmont has taken
power supply service pursuant to a FERC approved Net Requirements Power Supply
Agreement.

      In 1993, Cambridge Electric and Belmont began negotiations for a new
transmission service agreement.  The negotiations were not successful.  On
June 29, 1994, Cambridge Electric filed for FERC approval of a new
transmission service agreement with Belmont.  The FERC accepted the rates
effective January 25, 1995, subject to refund.  At the same time, an
investigation was opened by the FERC to determine the reasonableness of both
the existing transmission tariff rates to Belmont and the proposed trans-
mission service agreement with Belmont.  Both Belmont and FERC staff
intervened in the investigation.  Cambridge Electric filed its case with the
FERC on October 25, 1994 and evidentiary hearings were held in March 1995.

      An Initial Decision (ID) of the Presiding Administrative Law Judge was
issued on September 14, 1995.  In the ID, the Administrative Law Judge found
that Cambridge Electric's existing transmission tariff rates were just and
reasonable.  The Administrative Law Judge identified a number of revisions to
the filed transmission service agreement which effectively reduced the rates
to Belmont.  In October 1995, the parties filed briefs on exceptions to the
Administrative Law Judge's ID.  Cambridge Electric awaits final FERC action on
this investigation.

      On March 29, 1995, the FERC issued two notices of proposed rulemaking
concerning open access transmission and stranded costs.  The FERC's notices
proposed to remove impediments to competition in the wholesale bulk power
marketplace and to bring more efficient, lower-cost power to electric
consumers.  On March 29, 1996, Cambridge Electric filed transmission tariffs
that implemented the FERC's requirements for non-discriminatory open access
transmission for both point-to-point and network service.  The tariffs were
accepted on May 17, 1996 to be effective on May 28, 1996, but the rates are
subject to an investigation initiated by the FERC itself.  A settlement with
the FERC regarding this investigation was filed on February 6, 1997.

      On April 24, 1996, the FERC issued Order No. 888, a set of three
interrelated rules resolving the above rulemakings.  The FERC required all
public utilities that own, control or operate transmission facilities in
interstate commerce to have on file wholesale open access transmission tariffs
that conform to the FERC pro-forma tariff contained in Order No. 888.  On July
9, 1996, Cambridge Electric and Commonwealth Electric filed tariffs that
conform to the FERC's pro-forma tariffs.  On November 13, 1996, the FERC
accepted the non-rate terms and conditions of these tariffs effective July 9,
1996, subject to a revision of one section dealing with the scheduling of
services.  On March 4, 1997, the FERC issued Order No. 888-A which required
revisions to the tariffs filed in compliance with Order No. 888.  Cambridge
Electric and Commonwealth Electric both filed their revised tariffs on July
14, 1997.  On November 25, 1997, the FERC issued Order No. 888-B requiring
minor changes that did not require an additional filing.
<PAGE 11>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

      On December 31, 1996, Cambridge Electric and Commonwealth Electric
filed market-based power sales tariffs with the FERC that received FERC
approval on February 27, 1997.  The Companies seek authorization to make
wholesale power sales at fully negotiated rates.  In addition, the Companies
requested and received authorization to participate as brokers in the sale and
purchase of electricity.

      (c) Unbundled Rates

          Electric

      Both Commonwealth Electric and Cambridge Electric have restructured
their operations to provide customers with unbundled rates that provide a ten
percent rate reduction as of March 1, 1998 and the opportunity to purchase
generation supply on the competitive market pursuant to the electric industry
restructuring legislation enacted in November 1997.  Delivery rates are
composed of distribution charges, transition charges (to collect stranded
costs) and transmission charges.  Electricity supply services include optional
standard offer service and default service.  Distribution charges consist of
customer demand and energy charges as appropriate to recover distribution
costs, including costs formerly recovered under the Conservation Charge, and
is based on the separation of distribution and transmission facilities.
Transmission charges are itemized separately and are subject to each company's
Transmission Cost Adjustment.  Transition charges are designed to recover on a
reconciling basis all of each company's stranded costs.

      Prior to March 1, 1998, Commonwealth Electric and Cambridge Electric
had Fuel Charge rate schedules that generally allowed for current recovery,
from retail customers, of fuel used in electric production, purchased power
and transmission costs.  These schedules required a quarterly computation and
DTE approval of a Fuel Charge decimal based upon forecasts of fuel, purchased
power, transmission costs and billed unit sales for each period.  To the
extent that collections under the rate schedules did not match actual costs
for that period, an appropriate adjustment was reflected in the calculation of
the next subsequent calendar quarter decimal.

      Also prior to March 1, 1998, Cambridge Electric and Commonwealth
Electric collected a portion of capacity-related purchased power costs
associated with certain long-term power arrangements through base rates.  The
recovery mechanism for these costs used a per kilowatthour (KWH) factor that
was calculated using historical (test-period) capacity costs and unit sales. 
This factor was then applied to current monthly KWH sales.  When current
period capacity costs and/or unit sales varied from test-period levels,
Cambridge Electric and Commonwealth Electric experienced a revenue excess or
shortfall that had a significant impact on net income.  However, as part of
the settlement agreements approved by the DTE in May 1995, Cambridge Electric
and Commonwealth Electric were allowed to defer these costs (within certain
limits) which neutralized their sometimes volatile effect on net income.

      Both Commonwealth Electric and Cambridge Electric also had separately
stated Conservation Charge rate schedules that allowed for current recovery,
from retail customers, of conservation and load management costs.
<PAGE 12>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

          Gas

      Commonwealth Gas has a Standard Seasonal Cost of Gas Adjustment rate
schedule (CGA) that provides for the recovery, from firm customers, of
purchased gas and conservation and load management costs not recovered through
base rates.  These schedules, which require DTE approval, are estimated semi-
annually and include credits for gas pipeline refunds and profit margins
applicable to capacity release, off-system sales and interruptible sales. 
Actual gas costs are reconciled annually as of October 31, and any difference
is included as an adjustment in the calculation of the decimals for the two
subsequent six-month periods.

      Periodically, Commonwealth Gas is required to file a long-range
forecast of the energy needs and requirements of its market area and annual
supplements thereto with the DTE.  To approve this long-range forecast and
resource plans, the DTE must find, among other things, that Commonwealth Gas'
projected firm load is reasonable and based on proven and verifiable
forecasting methods and data, and that Commonwealth Gas assembles its supply
portfolio based on a prudent resource planning process that can be reasonably
expected to meet projected demands on a cost efficient basis.  Commonwealth
Gas filed its forecast, covering the period November 1996 through October
2001, with the DTE on December 20, 1996.

      (d) Gas Demand and Transition Costs

      Commonwealth Gas is obligated, as part of its pipeline transportation
contracts, storage contracts and gas purchase contracts, to pay monthly demand 
charges which are recovered from customers through the CGA.

      As a direct result of implementation of FERC Order 636, most pipeline
companies are incurring transition costs which include the cost of
restructuring gas supply contracts, the value of facilities that were
supporting the gas sales function and are no longer used and useful for
transportation only services, the cost of contracts with upstream pipeline
companies and various miscellaneous costs.  These costs are billed to
Commonwealth Gas and other local distribution companies.

      Commonwealth Gas is collecting all contract restructuring costs from
its customers through the CGA as permitted by the DTE.

      (e) Retail Choice Pilot Program

      Prior to March 1, 1998, the date retail choice was available for all
customers, Commonwealth Electric had designed a program to allow a limited
number of customers the opportunity to possibly reduce their electric bills
while Commonwealth Electric learned more about real-time pricing and the
administrative requirements associated with open-market competition.  Through
the program, Commonwealth Electric developed internal procedures for billing
and allocating the costs for providing an alternative supply to its retail
customers, and developed methods for educating customers regarding retail
choice.  The program was available to 18 commercial and industrial customers
of Commonwealth Electric that took service under one of Commonwealth
Electric's economic development rates.  This program was discontinued on
February 28, 1998.
<PAGE 13>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

      (f) Customer Transition Charge

      In September 1995, the DTE issued a ruling largely approving four rate
tariffs, including a Customer Transition Charge (CTC), that were filed by
Cambridge Electric on March 15, 1995.  The CTC was intended to protect
remaining customers from paying certain stranded costs that were incurred in
the event that Cambridge Electric's largest customers discontinued full
service, yet still remain connected for back-up and other services.  These
costs included long-term power contracts entered into to meet projected energy
requirements, investments in substations, underground and overhead lines and
current and future decommissioning costs associated with nuclear plants.  This
ruling is believed to be the first retail stranded cost charge approved
nationally and follows the DTE restructuring order which endorsed, in
principle, the recovery of stranded costs.

      Through the CTC, Cambridge Electric recovered 75% of net stranded costs
as calculated in its proposal.  Cambridge Electric's other rates include a
Supplemental Service Rate, a Standby Service Rate and a Maintenance Service
Rate each of which were approved with only minor changes. Pursuant to its
terms, the CTC will terminate as of March 1, 1998, which is the retail access
date established by the Massachusetts Legislature in its Electric Industry
Restructuring Act.

      The Massachusetts Institute of Technology (MIT) appealed the DTE's
ruling approving the CTC to the Massachusetts Supreme Judicial Court (the
SJC), contending, in part, that the DTE lacked authority to approve the CTC,
the DTE's ruling was not supported by subsidiary findings, imposition of the
CTC on MIT constitutes inequitable retroactive ratemaking, and the CTC
violates the Public Utility Regulatory Policies Act (PURPA).  On September 18,
1997, the SJC announced its decision remanding the matter to the DTE for
further consideration.  The SJC did find that recovery of prudent and
verifiable stranded costs by utility companies is in the public interest and
consistent with PURPA.  However, the SJC stated that the insufficiencies of
the DTE's subsidiary findings precluded the SJC from undertaking a meaningful
review of the DTE's calculations that formed the basis of the customer
transition charge.  Among the issues that the SJC directed the DTE to consider
further are: the methodology for calculation of stranded costs, why 75% of
stranded costs were allocated to MIT rather than 100%, the prudence of the
stranded costs incurred by Cambridge Electric, and whether Cambridge Electric
took the necessary mitigation efforts to reduce stranded costs.  The DTE is in
the process of determining whether to take additional evidence in the remand
or to rely on the record and pleadings already filed.  At this time,
management is unable to predict the outcome of this proceeding.

      In an earlier legal proceeding involving the CTC, on August 27, 1996,
the United States District Court for the District of Massachusetts (District
Court) granted the motions for summary judgement of Cambridge Electric and the
DTE and dismissed the May 1996 complaint filed by MIT.  In its complaint, MIT
had alleged that the CTC approved by the DTE and implemented by Cambridge
Electric violated PURPA.  In dismissing MIT's complaint, the District Court
found that MIT's complaint involved an allegation relating to the DTE's
application of PURPA, which is not within the District Court's jurisdiction.
<PAGE 14>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

      Competition

      The system continues to develop and implement strategies that deal with
the increasingly competitive environment facing the electric business.  The
system's actions in response to the competitive challenges brought on by
electric and gas industry restructuring have been well received by regulators,
business groups and customers.  For a more detailed discussion of the DTE's
restructuring order and gas service unbundling efforts, refer to the "Industry
Restructuring" section of Management's Discussion and Analysis of Financial
Condition and Results of Operations filed under Item 7 of this report.

      On February 6, 1997, due to the dramatically changing nature of the
electric and gas industries, the System announced the consolidation of
management personnel of Commonwealth Electric, Commonwealth Gas and COM/Energy
Services Company effective on that date.  These companies will continue to
operate under their existing company names.  The consolidation process for
these companies involved the merging of similar functions and activities to
eliminate duplication in order to create the most efficient and cost-effective
operation possible.  In addition, the system initiated a voluntary personnel
reduction program during the second quarter of 1997 which reduced the total
number of regular employees by approximately 13%.  Through this and prior work
force reductions and attrition, the system has reduced its full-time work
force approximately 33% since 1990.  Also, the introduction of advanced
technologies in the workplace continues to improve customer service and the
system's competitive position.  The system has yet to be significantly
impacted by the increase in competition and believes that its current business
strategy and entrance into unregulated markets will have a positive impact in
the near-term.

      Segment Information

      System companies provide electric, gas and steam services to retail
customers in service territories located in central, eastern and southeastern 
Massachusetts and, in addition, sell electricity at wholesale to Massachusetts
customers.  Other operations of the system include the pursuit of new business
opportunities and the operation of rental properties and other investment
activities which do not presently contribute significantly to either revenues
or operating income.

      Reference is made to additional industry segment information in Note 11
of Notes to Consolidated Financial Statements filed under Item 8 of this re-
port.

      Environmental Matters

      The system is subject to laws and regulations administered by federal,
state and local authorities relating to the quality of the environment. 
System compliance with these laws and regulations will require capital
expenditures of $68.2 million from 1998 through 2002 for the electric and gas
divisions.

      For additional information concerning environmental issues, refer to
the "Environmental Matters" section of "Management's Discussion and Analysis
of Financial Condition and Results of Operations" filed under Item 7 of this
report.
<PAGE 15>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

      Construction and Financing

      For information concerning the system's financing and construction
programs refer to Management's Discussion and Analysis of Financial Condition
and Results of Operations filed under Item 7 and Note 3(a) of the Notes to
Consolidated Financial Statements filed under Item 8 of this report.

      Employees

      The total number of full-time employees for the system declined by
approximately 13% to 1,727 in 1997 from 1,991 employees at year-end 1996 due
primarily to the initiation of a voluntary personnel reduction program during
the second quarter of 1997.  Of the current total, 1,037 (60%) are represented
by various collective bargaining units.  Agreements with three units
representing approximately 12% of regular employees are scheduled to expire in
1998.  Upon expiration of one of these contracts, representing 6% of regular
employees, a new contract (already ratified) will become effective through
March 1, 2001.  Although a labor dispute with one collective bargaining unit
occurred during 1996, employee relations have generally been satisfactory
since the dispute was resolved in September 1996.

Item 2.    Properties

      The system's principal electric properties consist of Canal Unit 1, a
569 MW oil-fired steam electric generating unit, and its one-half ownership in
Canal Unit 2, a 580 MW steam electric generating unit with the ability to burn
both oil and natural gas, both located at Canal Electric's facility in
Sandwich, Massachusetts.

      Cambridge Electric owns and operates two steam electric generating
stations and two gas turbine units located in Cambridge, Massachusetts with a
total capability of 112.5 MW and Commonwealth Electric has an interest in
smaller generating units totaling 13.8 MW.  Of these 126.3 MW, 63.3 MW is used
primarily for peaking and emergency purposes.  In addition, the system has a
3.52% interest (40.5 MW of capacity) in Seabrook 1 and a 1.4% (8.8 MW) joint-
ownership interest in Central Maine Power Company's Wyman Unit 4.

      Other electric properties include an integrated system of distribution
lines and substations.  In addition, the system's other principal properties
consist of an electric division office building in Wareham, Massachusetts and
other structures such as garages and service buildings.

      At December 31, 1997, the electric transmission and distribution system
consisted of 5,833 pole miles of overhead lines, 4,461 cable miles of
underground line, 371 substations and 381,159 active customer meters.

      The principal natural gas properties consist of distribution mains,
services and meters necessary to maintain reliable service to customers.  At
December 31, 1997, the gas system included 2,811 miles of gas distribution
lines, 167,777 services and 245,246 customer meters together with the
necessary measuring and regulating equipment.  In addition, the system owns a
liquefaction and vaporization plant, a satellite vaporization plant and above-
ground cryogenic storage tanks having an aggregate storage capacity equivalent
<PAGE 16>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

to 3.5 million MCF of natural gas.  The system's gas division owns a central
headquarters and service building in Southborough, Massachusetts, five
district office buildings and several natural gas receiving and take stations.


Item 3.    Legal Proceedings

      Cambridge Electric is an intervenor in an appeal at the Massachusetts
Supreme Judicial Court (SJC) filed by MIT of a decision by the DTE approving a
customer transition charge that allows Cambridge Electric to recover certain
stranded costs.  For additional information refer to the "Customer Transition
Charge" section in Item 1 of this report.

Item 4.    Submission of Matters to a Vote of Security Holders

           None
<PAGE 17>
       
              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

                                   PART II.

Item 5. Market for the Registrant's Securities and Related Stockholder
        Matters

    (a) Principal Markets

        The System's common shares are listed on the New York and Pacific
        stock exchanges.  The table below sets forth the high and low closing
        prices as reported on the New York Stock Exchange composite
        transactions tape.

                                 1997 by Quarter           
                      First     Second     Third     Fourth
            High      $24 1/2   $24        $27       $34 9/16
            Low        20 7/8    19         23 3/4    25 11/16

                                 1996 by Quarter           
                      First     Second     Third     Fourth
            High      $25       $25 3/4    $25 5/8   $24 7/8 
            Low        21 15/16  22 3/4     21 1/2    22 1/2

    (b) Number of Shareholders at December 31, 1997

        12,708 shareholders

    (c) Frequency and Amount of Dividends Declared in 1997 and 1996

                   1997                             1996            
                              Per                               Per
                             Share                             Share
        Declaration Date    Amount       Declaration Date     Amount
        March 27, 1997      $ .395       March 28, 1996       $ .385
        June 26, 1997         .395       June 27, 1996          .385
        September 25, 1997    .395       September 26, 1996     .385
        December 18, 1997     .395       December 19, 1996      .385
                            $1.580                            $1.540

    (d) Future dividends may vary depending upon the System's earnings and
        capital requirements as well as financial and other conditions
        existing at that time.








<PAGE 18>


              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

Item 6. Selected Financial Data



                       1997       1996        1995       1994       1993
                          (Dollars In Thousands Except Common Share Data)

Operating Revenues
  Electric           $  688,508 $  649,678  $  604,980 $  638,150 $  622,039
  Gas                   333,977    341,867     306,953    323,568    302,644
  Steam and other        19,250     19,360      17,355     15,867     14,035
   Total             $1,041,744 $1,010,905  $  929,288 $  977,585 $  938,718

Net Income           $   49,901 $   59,175  $   51,396 $   48,968 $   45,834

Common Share Data-
 Earnings per share       $2.27      $2.70       $2.36      $2.29      $2.18
 Dividends declared
   per share              $1.58      $1.54       $1.50      $1.50      $1.46
 Average shares
    outstanding      21,531,784 21,529,676  21,311,836 20,827,562 20,431,228

Total Assets         $1,485,050 $1,428,955  $1,392,342 $1,345,032 $1,318,940

Long-term debt       $  364,311 $  355,305  $  377,181 $  418,307 $  448,893
Redeemable preferred
  share investment       12,200     13,020      13,840     14,660     15,480
Common share
  investment            430,770    415,694     390,785    362,997    337,070
Total Capitalization $  807,281 $  784,019  $  781,806 $  795,964 $  801,443



                                             1997 by Quarter
                                  1st        2nd         3rd        4th
                            (Dollars In Thousands Except Per Share Amounts)

Operating Revenues               $316,190   $221,944   $222,115   $281,495
Operating Income                   35,892      7,793     16,887     27,078
Income Before Interest Charges     36,541      8,774     17,227     27,709
Net Income                         26,400     (1,334)     7,147     17,688
Earnings per Common Share            1.21       (.07)       .32        .81
Dividends Declared per
  Common Share                       .395       .395       .395       .395
Closing Price of Common Shares-
  High                             24 1/2     24         27       34  9/16
  Low                              20 7/8     19         23 3/4   25 11/16


                                             1996 by Quarter
                                  1st        2nd         3rd        4th
                            (Dollars In Thousands Except Per Share Amounts)

Operating Revenues               $298,614   $222,667   $226,909   $262,715
Operating Income                   36,131     18,608     17,601     24,325
Income Before Interest Charges     38,622     19,863     18,838     24,220
Net Income                         27,907      9,463      8,360     13,445
Earnings per Common Share            1.28        .43        .37        .62
Dividends Declared per
  Common Share                       .385       .385       .385       .385
Closing Price of Common Shares-
  High                           25           25 3/4     25 5/8     24 7/8
  Low                            21 15/16     22 3/4     21 1/2     22 1/2
<PAGE 19>
              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

Item 7.   Management's Discussion and Analysis of Financial Condition
          and Results of Operations

Results of Operations

    Earnings and Dividends

    Earnings and earnings per common share by organizational element for the
three-year period were as follows:

                                 1997              1996              1995    
                                      Per               Per              Per
                           Amount    Share    Amount   Share    Amount  Share
                            (Dollars in thousands except per share amounts)

    Electric...........    $34,811   $1.62    $39,667  $1.85    $32,247 $1.52
    Gas................     14,681     .68     16,229    .75     15,352   .72
    Other..............       (579)   (.03)     2,229    .10      2,687   .12
        Total..........    $48,913   $2.27    $58,125  $2.70    $50,286 $2.36

    Parent company earnings and dividends on preferred shares were allocated
among the electric, gas and other operations of the system based on the
Parent's equity investment in each segment.

    1997 versus 1996

    Earnings per share for the year 1997 were $2.27 compared to the record
level of $2.70 achieved last year.  The decline for the year was due to a one-
time after-tax charge of $10.7 million, or 50 cents per share, that related to
a voluntary personnel reduction program (PRP).  Factors that had a positive
impact on earnings for the year were lower operating and maintenance expenses  
(25 cents) that resulted, in part, from the PRP, an increase in electric unit
sales (11 cents) and the absence in 1997 of costs associated with a labor
dispute in 1996 (13 cents).  Earnings for 1997 were negatively affected by the
absence of a 1996 refund associated with a power contract settlement agreement
(11 cents), lower firm gas unit sales (8 cents), costs associated with new
business development (12 cents), the absence of a 1996 recognition of the
recoverability of costs associated with Canal Electric Company's postretire-
ment benefits costs that were subsequently recovered in wholesale rates     
(5 cents) and a lower investment base on generation assets (6 cents).

    1996 versus 1995

    In 1996, earnings per share increased 34 cents to $2.70.  Significant
factors that contributed to the improved earnings included higher firm gas   
(18 cents) and retail electric (14 cents) unit sales, the refund associated
with the power contract settlement agreement (11 cents), lower interest costs  
(9 cents), and the recognition of Canal's recovery of postretirement benefits
costs (5 cents).  Partially offsetting these factors were costs related to the
labor dispute (13 cents), storm damage from Hurricane Edouard (6 cents), a
customer refund (5 cents in 1996 versus 1 cent in 1995) pursuant to a 1995
settlement agreement with the Massachusetts Department of Telecommunications
and Energy (DTE) (formerly the Massachusetts Department of Public Utilities)
that limited Commonwealth Electric Company's return on equity, as defined in a
settlement that expired in 1997, and the reversal in 1995 of a reserve (4
cents) related to a conservation program settlement in 1995.
<PAGE 20>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

    In March 1997, the System's Board of Trustees increased the quarterly
dividend rate per share 2.6% from 38 1/2 cents to 39 1/2 cents ($1.58 on an
annualized basis).  This was the second consecutive year and the third time in
four years that the Board had voted to increase the quarterly dividend rate. 
Dividends paid to common shareholders in 1997 were $34.1 million, representing
a payout ratio of 69% of 1997 earnings per share.

    Electric Operations

    Electric operating revenues for 1997 increased $38.8 million (6%) due to
greater wholesale sales reflecting the changing capacity needs of non-affili-
ated utilities ($11.7 million) and the Independent System Operator (ISO) - New
England (formerly the New England Power Pool that operates a centralized
facility to ensure reliability of service and dispatch of economically
available generating units throughout New England) ($11 million) and higher
retail unit sales ($2.4 million).  Offsetting these factors was the absence of
a $4 million refund associated with the 1996 power contract settlement agree-
ment and lower revenues ($2.1 million) due to the return allowed on Canal's
declining investment base.

    In 1996, electric operating revenues increased $44.7 million (7.4%) due
mainly to higher fuel costs of $33.9 million reflecting the increased avail-
ability of Canal's Unit 1 generating facility that was out of service during
the first seven months of 1995 for scheduled maintenance and repairs. The
remainder of the change reflects the $4 million refund associated with the
power contract settlement, the impact of higher retail unit sales ($3.9
million), and the recovery in rates of $1.8 million for Canal's previously
deferred postretirement benefits costs.

    Unit sales (in Megawatthours or MWH) were as follows:
                                          %                   %
                                1997    Change      1996    Change      1995  

    Residential..........    1,830,793   1.5     1,802,973   2.9     1,752,430
    Commercial...........    2,506,215   3.1     2,430,188  (0.8)    2,450,390
    Industrial and other.      459,104   2.1       449,844   1.1       445,020
        Total retail.....    4,796,112   2.4     4,683,005   0.8     4,647,840
    Wholesale............    3,916,974  43.9     2,721,623  37.9     1,973,543
        Total............    8,713,086  17.7     7,404,628  11.8     6,621,383

    In 1997 and 1996, retail unit sales increased due to approximately 4,200
(1.2%) and 3,700 (1.0%) additional customers, the significant majority of
which are permanent year-round residential customers.  The increase in the
level of wholesale sales reflected the increased availability of Canal Unit 1
(by 53%) and greater sales to ISO - New England (by nearly 43%).  The changes
in wholesale unit sales have little, if any, impact on net income.

    The $38.1 million increase in fuel and purchased power costs in 1997 was
due primarily to higher wholesale unit sales and higher costs for replacement
power reflecting the permanent shutdown of both Connecticut Yankee during 1996
and Maine Yankee in 1997, the latter of which was taken out of service in
December 1996.  In 1996, the cost of fuel increased by $33.9 million due
primarily to the availability of Canal Unit 1, while the cost of purchased
power decreased by $9.8 million reflecting the availability of Canal Unit 1
and the reduced requirement for other more costly sources of capacity.
<PAGE 21>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

    Gas Operations

    In 1997, gas operating revenues decreased $7.9 million (2.3%) primarily
due to a 5.6% decline in firm unit sales ($11.1 million) and lower conserva-
tion and load management (C&LM) costs ($1.8 million), offset by an increase in
transportation revenues of $1.8 million and revenues from sales of gas to
third parties of $3.9 million.  In 1996, operating revenues increased approxi-
mately $34.9 million or 11.4% due to higher gas costs of $28.7 million
reflecting both higher prices from suppliers and increased unit sales to
customers.  The increased firm sales, including transportation, equated to
$6.9 million due to colder weather during 1996.

    Commonwealth Gas Company also utilizes the off-system sales and capacity
release markets as a means to sell excess resources.  A margin-sharing
agreement for these sales was approved by the DTE on January 15, 1997 that
allowed Commonwealth Gas to retain 25% of the gross margins realized above a
certain threshold amount as set from year to year with the remaining margins
credited to firm customers through the Cost of Gas Adjustment clause.  As a
result of this margin-sharing agreement, Commonwealth Gas realized revenues of
approximately $644,000 in 1997.

    Unit sales and transportation volume (in billions of British thermal
units or BBTU) were as follows:
                                          %                  %
                                1997    Change     1996    Change     1995  

    Residential.........       22,043   (3.1)      22,759    6.7     21,336
    Commercial..........       11,077   (4.2)      11,558    7.9     10,710
    Industrial and other        5,594  (16.2)       6,676    4.1      6,412
        Total firm.......      38,714   (5.6)      40,993    6.6     38,458
    Off-system..........        2,673   10.5        2,420  (40.1)     4,043
    Quasi-firm..........           51  (95.2)       1,066  (44.1)     1,906
    Interruptible.......        1,882   (0.1)       1,883   55.0      1,215
        Total sales......      43,320   (6.6)      46,362    1.6     45,622
    Transportation......        6,506   34.1        4,852   20.6      4,024
        Total............      49,826   (2.7)      51,214    3.2     49,646

    The decline in firm unit sales in 1997 was due to decreases to all
customer segments that reflected milder weather experienced in the region
during the first quarter as compared to a colder period in 1996.  Degree days
for the current year totaled 6,463, 3.6% lower than last year and 1.2% below
the normal level of 6,541.  The significant fluctuations in non-firm sales
reflected the competitive environment that exists in the natural gas industry. 
A portion of the margin realized on these sales reduced the cost of gas sold
to firm customers.

    The increase in unit sales to firm customers during 1996 (6.6%) reflected
significant improvements for all customer segments consistent with colder than
normal weather experienced during the year, as compared to milder weather in
1995 that was 1.4% above normal.  Heating degree days were nearly 3.8% higher
during 1996 as compared to 1995 and 2.3% above normal.  A growing customer
base, including customers formerly receiving quasi-firm sales service,
somewhat offset the decline in firm sales in 1997 and contributed to the
increase in firm unit sales in 1996.
<PAGE 22>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

    Other Operating Expenses

    Other operation in 1997 increased $10.3 million or 4.8% due to a one-time
charge related to the PRP ($17.7 million) as further discussed below, costs
associated with new business development ($3.6 million), and an increase in
the provision for bad debts ($1.4 million) that reflected higher reserve
requirements.  The impact of these factors was offset, in part, by lower
operating costs ($5 million) that resulted, in part, from the PRP, lower
pension costs ($2.7 million) and the absence of costs related to the 1996
labor dispute ($4.6 million).

    The system initially announced the details of the system-wide voluntary
PRP in May 1997.  The goal of the PRP was to achieve a reduced, more efficient
and more productive workforce in response to the significant regulatory
changes facing the system.  In 1997, approximately 13% of system employees
voluntarily terminated employment as a result of the PRP.  The one-time charge
of $17.7 million referred to above excludes generation-related costs, the
recovery of which is being addressed as part of the electric industry restruc-
turing process.  The payback period for the cost of the PRP is expected to be
about one year.  This action followed the consolidation of the system's
electric and gas operations earlier in 1997.  In furtherance of this consoli-
dation effort, the system, in March 1998, reached agreement with IBM Global
Services, Inc. to offer employment to 40 system employees and to provide all
of the system's information technology, telecommunications and network
services.

    In 1996, other operation increased approximately $9 million or 4.4% and
reflected the impact of higher general liability insurance costs ($6.3
million), higher postretirement benefits costs ($4 million), and the net
impact of the labor dispute.  These expenses were offset somewhat by lower
C&LM costs ($2.4 million), a $1.6 million decline in health benefits costs, a
decline in the provision for bad debts ($1.1 million) that reflected improved
collection experience, and the absence of legal fees ($800,000) associated
with the cancellation of a power contract in 1995.

    Maintenance declined in 1997 by $4.1 million or 10% and resulted from a
reduction in transmission and distribution-related projects and, to a lesser
extent, the PRP.  Maintenance increased in 1996 by $2.5 million or 6.5%
primarily due to storm damage costs related to Hurricane Edouard ($2.1
million), partially offset by reductions primarily associated with Canal Unit
1 ($1.5 million).

    Depreciation increased $1.6 million and $3.6 million in 1997 and 1996,
respectively, and reflected the system's additions to property, plant and
equipment, that included the costs associated with the completed conversion of
Canal Unit 2 in mid-1996 to burn natural gas as well as oil.

    Federal and state income taxes decreased by $5.1 million during 1997 due
mainly to the lower level of pre-tax income.  Local property and other taxes
were higher during 1997 due to higher property tax rates and assessments
within the system's service territory and an increase in payroll-related taxes
due to the 1996 labor dispute.
<PAGE 23>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

    Other Income

    In 1997, other income decreased $2.3 million due primarily to the absence
of a 1996 recognition of the recoverability of costs associated with Canal's
postretirement benefits ($1.8 million) following Federal Energy Regulatory
Commission approval, and the absence of a 1996 gain that related to the sale
of parcels of land ($700,000).  These two factors were also the primary causes
for the change for 1996 versus 1995.

    Interest Charges

    The $2 million decline in total interest charges for 1997 was due to
maturing long-term debt and scheduled sinking fund payments partially offset
by a slightly higher average level of short-term borrowings.  The decline of
$2.2 million, or 5%, in 1996 also reflected maturing debt and sinking fund
payments.

Liquidity and Capital Resources

    Financial Condition

    The system's cash requirements are essentially met through the generation
of cash flows from the sale of electricity, natural gas (including liquefied
natural gas) and steam.  Cash requirements for current operations, construc-
tion programs, debt service and other capital requirements are maintained
through internal generation and short-term borrowings made available through
the system's credit lines with banks.  Long-term debt issues are used to
permanently finance short-term debt when deemed appropriate by management.

    The system's 1997 net cash flow from operating activities exceeded funds
required to support additions to property, plant and equipment by $50 million
or 86.9%.  Plant additions continued to be funded entirely with internally-
generated funds.  The year's cash requirements for the payment of preferred
and common dividends ($35.1 million), the funding of maturing long-term debt
and sinking fund requirements ($22.7 million) and the re-payment of short-term
borrowings ($24.4 million) were provided from operations and proceeds from the
issuance of long-term debt ($35 million).  Other information on the sources
and uses of cash for the past three years is included in the Consolidated
Statements of Cash Flows.
<PAGE 24>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

                                Capitalization
    -------------------------------------------------------------------
                           Bar graph illustration of
                 comparative five-year (1998-2002) forecast of
                   capitalization components based on values
                            listed in chart below.
    -------------------------------------------------------------------

                                        Forecast                       
                   1998        1999         2000        2001         2002
                                    (Dollars in Millions)

    Common
      Equity  $  459  42%  $  478  46% $  512  48%  $  563  51% $  620  54%
    Total
      Debt       621  57      551  53     539  51      520  48     507  45
    Preferred
      Stock       11   1       10   1      10   1        9   1       8   1
              $1,091 100%  $1,039 100% $1,061 100%  $1,092 100% $1,135 100%


    Capital Requirements and Resources

    The system's projected capital expenditures for the years 1998 through
2002 are $627.8 million, including $254.7 million for 1998 that consists of
approximately $150 million for Advanced Energy Systems, Inc.'s pending
purchase of a total energy plant that serves the Longwood Medical Area in
Boston (as further discussed below), $60.3 million in construction expendi-
tures, $28.8 million for debt and sinking fund payments, and $15.6 million
related to new business development.  These 1998 expenditures will be met
primarily through a combination of long and short-term debt issues ($186.8
million) and internally-generated funds of $67.9 million.

    Advanced Energy has reached agreement to purchase the total energy plant
that is owned and operated by Harvard University (MATEP) and provides the
steam, cooling and electric requirements of Harvard's professional schools and
five affiliated teaching hospitals in Boston.  The closing for this transac-
tion is expected to occur during the second quarter of 1998.  It is projected
that this new venture will increase system revenues by approximately $45
million in 1998 and, on average, by approximately $65 million in the years
1999 through 2002.

    The System could also raise capital through the issuance of additional
Common Shares, a new series of Preferred Shares, or through its Dividend
Reinvestment and Common Share Purchase Plan.  The System's goal is to maintain
a capital structure that preserves an appropriate balance between debt and
equity.  Management believes its capital resources and liquidity are suffi-
cient to meet its current and projected requirements.
<PAGE 25>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

    The system's capitalization structure is presented below:

                                 1996                    1997      
                                   (Dollars in thousands)

    Long-term debt....      $369,565    40.3%       $383,311   41.7%
    Preferred shares..        13,020     1.4          12,200    1.3
    Common equity.....       415,694    45.4         430,770   46.8
    Short-term debt...       118,475    12.9          94,075   10.2
    Total capitalization    $916,754   100.0%       $920,356  100.0%


                             Capital Requirements
    -------------------------------------------------------------------
                           Bar graph illustration of
                    comparative two-year (1996-1997) actual
                     and five-year (1998-2002) forecast of
                     capital requirements based on values
                            listed in chart below.
    -------------------------------------------------------------------

                                                 Forecast             
                       1996   1997   1998    1999    2000  2001    2002
                                     (Dollars in Millions)
    Construction-
        Electric       $ 38   $ 34   $ 41    $ 29    $ 28  $ 25    $ 25
        Gas              12     18     18      18      18    19      19
        Other             3      5      1       1       1     1       1
    Maturing Debt        42     23     29     115      10    11      39
    Purchase of MATEP    -      -     150      -       -     -       - 
    New Business         -      -      16       3       3     3       3
                       $ 95   $ 80   $255    $166    $ 60  $ 59    $ 88


    Forward-Looking Statements

    This discussion contains statements which, to the extent it is not a
recitation of historical fact, constitute "forward-looking statements" and is
intended to be subject to the safe harbor protection provided by the Private
Securities Litigation Reform Act of 1995.  A number of important factors
affecting the System's business and financial results could cause actual
results to differ materially from those reflected in the forward-looking
statements or projected amounts.  Those factors include developments in the
legislative, regulatory and competitive environment, certain environmental
matters, demands for capital and new business development expenditures and the
availability of cash from various sources.

Industry Restructuring

    Electric

    On November 25, 1997, the Governor of Massachusetts signed into law the
Electric Industry Restructuring Act (the Act).  Provisions of this legislation
include, among other things, a 10 percent discount on standard offer service
<PAGE 26>
              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

and retail choice of energy supplier effective March 1, 1998, with a subse-
quent increase in the discount on standard offer service of up to 15 percent
upon completion of divestiture of non-nuclear generating assets and securiti-
zation of net non-mitigable stranded costs (which, for the system, are
primarily the result of above-market purchased power contracts with non-
utility generators) and, recovery of stranded costs subject to review and an
audit process.

    The system filed a comprehensive electric restructuring plan with the DTE
on November 19, 1997 that was thoroughly reviewed in five separate hearings
that solicited public comment, and seven days of evidentiary hearings that
were completed in February 1998.

    Consistent with the Act, the system's plan provides, as of March 1, 1998,
a rate reduction of 10 percent for customers choosing the standard service
transition rate from the average of undiscounted rates in effect during August
1997, divestiture of non-nuclear generating assets and a restructured electric
generation market that is able to offer retail access to all customers.  The
system's plan also includes the following provisions: 1) an estimate and
detailed accounting of total transition costs eligible for recovery through a
non-bypassable access or transition charge; 2) a description of the system's
strategies to mitigate transition costs; 3) unbundled rates for generation,
distribution, transmission and other services; 4) proposed charges for the
recovery of transition costs through the non-bypassable transition charge;  
5) proposed programs to provide universal service to all customers; 6)
proposed programs and mandatory charges to promote energy conservation and
demand-side management; 7) procedures for ensuring direct retail access to all
electric generation suppliers; 8) discussions of the impact of the plan on the
system's employees and the communities served by the system; and (9) a
mandatory charge per kwh for all consumers to support the development and
promotion of renewable energy projects.

    On February 27, 1998, the DTE approved the system's restructuring plan
stating that the plan complies with the Act.  While the system is encouraged
with the treatment afforded stranded or transition cost recovery by the
legislation and the DTE, the mandated customer discount could have a signifi-
cant impact on future cash flows.

    Auction Process

    On March 31, 1997, the system submitted a report to the DTE that detailed
the proposed auction process for selling its electric generation assets and
entitlements.  The process included a standard, sealed-bid auction for
generation assets and purchased power contracts.  The auction process provides
a market-based approach to maximizing stranded cost mitigation and minimizing
the access charges that ratepayers will have to pay for stranded cost recov-
ery.  A request for bids from interested parties was issued during August, and
an Offering Memorandum was issued in October.  Potential bidders examined all
pertinent information related to the system's generating facilities and
purchased power agreements in order to prepare and submit their first round of
bids in mid-December.  In January 1998, the system selected a short list of
potential bidders, each of whom are expected to submit a final binding bid in
the second quarter of 1998.  The entire process, including regulatory approv-
als, is expected to be completed in 1998.
<PAGE 27>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

    Gas

    On July 18, 1997, the DTE directed the ten Massachusetts gas utilities,
including Commonwealth Gas, to initiate a collaborative process that will
establish guiding principles and specific procedures for unbundling rates and
services for all customers.

    The DTE listed six principles that it considers important to the success
of a competitive natural gas market that will provide safe and reliable
service at the lowest possible cost to customers.  The natural gas market
would: (1) provide the broadest possible choice; (2) provide all customers
with an opportunity to share in the benefits of increased competition; (3)
ensure full and fair competition in the gas supply market; (4) functionally
separate supply from local distribution services; (5) support and further the
goals of environmental regulation; and lastly (6) rely on incentive regulation
where a fully competitive market cannot or presently does not exist.

    In addition, the DTE outlined several specific issues that it expects the
collaborative to address: (1) services that can be offered on a competitive
basis; (2) terms and conditions of service; (3) consumer protections and
social programs; (4) mitigation of gas related and non-gas related transition
costs; (5) third-party supplier qualifications; and (6) curtailment princi-
ples.  The DTE also suggested that the collaborative reconsider the pricing
and provision of interruptible transportation services.

    On August 18, 1997, the DTE noted that the development of unbundling
principles and procedures constitutes only a part of the effort necessary to
develop full customer choice for gas service.  The DTE recognized that each
local distribution company will be filing a comprehensive unbundling proposal
at some later date.  In the interim, the DTE directed those companies that do
not currently have unbundled rates, including Commonwealth Gas, to have such
rates in effect no later than November 1, 1998.

    Commonwealth Gas and eight other gas utilities initiated the Massachu-
setts Gas Unbundling Collaborative (the Collaborative) on September 15, 1997,
to explore and develop generic principles to achieve the goals set forth by
the DTE.  Collaborative participants represented a broad array of stakeholder
interests including the utilities, natural gas marketers, interstate pipe-
lines, producers, energy consultants, unions, consumer advocates and represen-
tatives for the DTE, the Massachusetts Attorney General, and the Massachusetts
Division of Energy Resources.

    On November 15, 1997, the Collaborative filed a status report with the DTE
that outlined its progress in moving the gas industry to a more competitive
structure that provides all customers with meaningful access to competitive
markets consistent with public-policy objectives.  The status report summa-
rized the substantive issues that had been the subject of Collaborative
discussion, including: (1) the disposition of interstate pipeline capacity;
(2) the unbundling of rates; (3) customer enrollment, billing, termination,
and information exchange procedures; and, (4) consumer protections, low-income
discounts, and competitive supplier registration.  The status report also
established a schedule to implement a final unbundling plan by November 1,
1998.

    In accordance with that schedule, the Collaborative submitted with the DTE
<PAGE 28>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

a Rate Unbundling Status Report on January 16, 1998.  The report detailed an
overall process for developing unbundled rates consistent with the DTE's rate
structure goals of efficiency, fairness, simplicity, continuity and earnings
stability.   In response to the Collaborative's proposal, the DTE ordered
Commonwealth Gas to submit, no later than April 15, 1998, a consensus-based
settlement, or partial settlement, of unbundled rate tariffs designed accord-
ing to the general concepts set forth in the report.

    Provisions of Statement of Financial Accounting Standards No. 71

    As described in Note 2(b) of the Notes to Consolidated Financial State-
ments, the system follows the provisions of Statement of Financial Accounting
Standards (SFAS) No. 71, "Accounting for the Effects of Certain Types of
Regulation."  In the event the system is somehow unable to meet the criteria
for following SFAS No. 71, the accounting impact would be an extraordinary,
non-cash charge to operations in an amount that could be material.  Conditions
that could give rise to the discontinuance of SFAS No. 71 include: 1) increas-
ing competition restricting the system's ability to establish prices to
recover specific costs, and 2) a significant change in the current manner in
which rates are set by regulators.  The system monitors these criteria to
ensure that the continuing application of SFAS No. 71 is appropriate.  Based
on the current evaluation of the various factors and conditions that are
expected to impact future cost recovery, the system believes that its retail
electric utility operations, excluding generation-related assets, remain
subject to SFAS No. 71 and its regulatory assets, including those related to
electric generation, remain probable of future recovery.

    As a result of electric industry restructuring, the system's retail
electric companies discontinued application of accounting principles applied
to their investment in electric generation facilities effective March 1, 1998. 
The system will not be required to write off any of its generation-related
assets, including regulatory assets.  These assets will be retained on the
Consolidated Balance Sheets because the legislation and the DTE's plan for a
restructured electric industry specifically provide for their recovery through
the non-bypassable transition charge.

Environmental Matters

    Commonwealth Gas is participating in the assessment of a number of former
manufactured gas plant (MGP) sites and alleged MGP waste disposal locations to
determine if and to what extent such sites have been contaminated and whether
Commonwealth Gas may be responsible for remedial actions.  In April 1997,
Commonwealth Gas recorded an additional liability and corresponding regulatory
asset of $1.2 million due to an increase in the site clean-up cost estimate
for an MGP site for which Commonwealth Gas was previously cited as a Poten-
tially Responsible Party.  The DTE has approved recovery of costs associated 
with MGP sites.

    Commonwealth Gas and certain other system subsidiaries are also involved
in other known or potentially contaminated sites where the associated costs
may not be recoverable in rates and have recorded in prior years an estimated
liability (and a charge to operations) of $2 million to cover the expected
costs associated with assessment and remediation activities.  These estimates
are reviewed and adjusted periodically as further investigation and assignment
of responsibility occurs.  The system is unable to estimate its ultimate
<PAGE 29>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

liability for future environmental remediation costs.  However, in view of the
system's current assessment of its environmental responsibilities, existing
legal requirements and regulatory policies, management does not believe that
these matters will have a material adverse effect on the system's results of
operations or financial position.

    On January 1, 1997, the system adopted the provisions of Statement of
Position (SOP) 96-1, "Environmental Remediation Liabilities."  SOP 96-1 pro-
vides authoritative guidance for recognition, measurement, display and
disclosure of environmental remediation liabilities in financial statements. 
The system has recorded environmental remediation liabilities net of amounts
paid of $2.3 million at December 31, 1997.  The adoption of SOP 96-1 did not
have a material adverse effect on the system's results of operations or
financial position.

Year 2000

    The system has been involved in the Year 2000 compliancy since 1996.  A
complete inventory and review of software, information processing and delivery
systems has been completed, and work continues on computer systems wherever
necessary.  While some computer systems have already been updated, tested and
placed in production, the system expects to complete the balance of the
modifications by early 1999.

    Expenditures incurred by the system through 1997 to review existing
computer systems and to modify existing software and applications amounted to
nearly $900,000, and it is estimated that approximately $2.6 million will be
incurred in 1998 and 1999.

    Management believes that, with appropriate modifications, the system will
be fully compliant regarding all Year 2000 issues and will continue to provide
its products and services uninterrupted through the millennium change. 
Failure to become fully compliant could have a significant impact on the
system's operations.

New Accounting Principles

    During 1997, the Financial Accounting Standards Board issued two new
accounting standards that the system will adopt in 1998.  SFAS No. 130,
"Reporting Comprehensive Income" will require disclosure on comprehensive
income and its components.  SFAS No. 131, "Disclosures about Segments of an
Enterprise and Related Information" will require disclosure of financial and
descriptive information on reportable operating segments.  The adoption of
these standards is not expected to have a material impact on the system's
results of operations or financial position.

Item 8. Financial Statements and Supplementary Data

    The Company's financial statements required by this item are filed
herewith on pages 30 through 52 of this report.

Item 9. Changes in and Disagreements with Accountants on Accounting and
        Financial Disclosure

    None.
<PAGE 30>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

Item 8.  Financial Statements and Supplementary Data

                              MANAGEMENT'S REPORT

      The consolidated financial statements presented herein are representa-
tions of the management of Commonwealth Energy System.  Management recognizes
its responsibility for the preparation and presentation of financial state-
ments in conformity with generally accepted accounting principles.  To fulfill
this responsibility, management maintains a system of internal accounting
controls, including established policies and procedures and a comprehensive
internal auditing program to evaluate the adequacy and effectiveness of
accounting and operating controls, compliance with system policies and
procedures and the safeguarding of system assets.

      The responsibility of our independent auditors' examination is limited
to the expression of an opinion as to the fairness of the consolidated
financial statements presented.  The independent auditors are selected by the
Board of Trustees and report their findings thereto through the Audit Commit-
tee, which is comprised of three outside Trustees.  The Board of Trustees is
responsible for ensuring that both the independent auditors and management
fulfill their respective responsibilities as they pertain to these consolidat-
ed financial statements.

                                          James D. Rappoli,
                                          Financial Vice President
                                            and Treasurer

March 2, 1998.


                   REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS

To the Board of Trustees of Commonwealth Energy System:

      We have audited the accompanying consolidated balance sheets and
consolidated statements of capitalization of COMMONWEALTH ENERGY SYSTEM (the
System) (a Massachusetts trust) and subsidiary companies as of December 31,
1997 and 1996, and the related consolidated statements of income, cash flows,
changes in common shareholders' investment and changes in redeemable preferred
shares for each of the three years in the period ended December 31, 1997. 
These consolidated financial statements are the responsibility of the System
and subsidiary companies' management.  Our responsibility is to express an
opinion on these consolidated financial statements based on our audits.

      We conducted our audits in accordance with generally accepted auditing
standards.  Those standards require that we plan and perform the audit to
obtain reasonable assurance about whether the financial statements are free of
material misstatement.  An audit includes examining, on a test basis, evidence
supporting the amounts and disclosures in the financial statements.  An audit
also includes assessing the accounting principles used and significant
estimates made by management, as well as evaluating the overall financial
statement presentation.  We believe that our audits provide a reasonable basis
for our opinion.

      In our opinion, the consolidated financial statements referred to above
present fairly, in all material respects, the financial position of Common-
wealth Energy System and subsidiary companies as of December 31, 1997 and
1996, and the results of their operations and their cash flows for each of the
three years in the period ended December 31, 1997, in conformity with general-
ly accepted accounting principles.

                                          Arthur Andersen LLP

Boston, Massachusetts
February 19, 1998 (except with respect to certain matters discussed in Note 2,
as to which the date is March 2, 1998).
<PAGE 31>


              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

                  INDEX TO FINANCIAL STATEMENTS AND SCHEDULES

                                   PART II.


FINANCIAL STATEMENTS


      Consolidated Statements of Income for the Years Ended December 31, 1997,
      1996 and 1995

      Consolidated Statements of Cash Flows for the Years Ended December 31,
      1997, 1996 and 1995

      Consolidated Balance Sheets at December 31, 1997 and 1996

      Consolidated Statements of Capitalization for the Years Ended December
      31, 1997, 1996 and 1995

      Consolidated Statements of Changes in Common Shareholders' Investment
      for the Years Ended December 31, 1997, 1996 and 1995

      Consolidated Statements of Changes in Redeemable Preferred Shares for
      the Years Ended December 31, 1997, 1996 and 1995

      Notes to Consolidated Financial Statements


                                   PART IV.


SCHEDULES

      I     Investments in, Equity in Earnings of, and Dividends Received     
            from Related Parties for the Years Ended December 31, 1997, 1996  
            and 1995

      II    Valuation and Qualifying Accounts for the Years Ended December 31,
            1997, 1996 and 1995

SCHEDULES OMITTED

      All other schedules are not submitted because they are not applicable or
      not required or because the required information is included in the
      financial statements or notes thereto.


<PAGE 32>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

                       CONSOLIDATED STATEMENTS OF INCOME

             FOR THE YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995

                (Dollars in thousands except per share amounts)

                                              1997        1996        1995

Operating Revenues
  Electric                                 $  688,508  $  649,678   $604,980
  Gas                                         333,977     341,867    306,953
  Steam and other                              19,259      19,360     17,355
                                            1,041,744   1,010,905    929,288

Operating Expenses
  Fuel used in electric production,
    principally oil                           129,021      91,690     57,820
  Electricity purchased for resale            265,805     265,019    274,795
  Cost of gas sold                            184,122     187,530    158,835
  Other operation                             225,658     215,319    206,280
  Maintenance                                  36,838      40,913     38,414
  Depreciation                                 53,405      51,782     48,170
  Taxes-
    Local property                             19,130      18,049     17,573
    Income                                     31,040      36,099     24,574
    Payroll and other                           9,075       7,839      8,284
                                              954,094     914,240    834,745
Operating Income                               87,650      96,665     94,543

Other Income                                    2,601       4,878      1,461

Income Before Interest Charges                 90,251     101,543     96,004

Interest Charges
  Long-term debt                               33,572      35,586     38,581
  Other interest charges                        6,778       6,782      6,027
                                               40,350      42,368     44,608

Net Income                                     49,901      59,175     51,396
  Dividends on preferred shares                   988       1,050      1,110
Earnings Applicable to Common Shares       $   48,913  $   58,125   $ 50,286

Average Number of Common Shares
  Outstanding                              21,531,433  21,529,676 21,311,836
Earnings Per Common Share                       $2.27       $2.70      $2.36


















The accompanying notes are an integral part of these consolidated financial
statements.
<PAGE 33>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

                          CONSOLIDATED BALANCE SHEETS

                          DECEMBER 31, 1997 AND 1996

                            (Dollars in thousands)

                                                       1997        1996
Assets

Property, Plant and Equipment, at original cost
  Electric                                          $1,173,797   $1,150,818
  Gas                                                  373,541      357,403
  Other                                                 72,475       66,365
                                                     1,619,813    1,574,586
  Less-Accumulated depreciation and amortization       577,962      536,041
                                                     1,041,851    1,038,545
  Construction work in progress                          7,864        5,485
  Nuclear fuel in process                                  193        1,597
                                                     1,049,908    1,045,627

Equity in Corporate Joint Ventures
  Nuclear electric power companies (2.5% to 4.5%)       10,368       10,046
  Other investments                                      3,399        3,349
                                                        13,767       13,395

Current Assets
  Cash                                                   4,299        1,495
  Accounts receivable, less reserves of $9,408 in
    1997 and $8,324 in 1996                            128,946      117,008
  Unbilled revenues                                     32,029       31,698
  Inventories, at average cost-
    Electric production fuel oil                         1,902        2,221
    Natural gas                                         23,301       23,084
    Materials and supplies                               7,441        6,220
  Prepaid taxes                                          9,282        9,079
  Other                                                  5,786        5,686
                                                       212,986      196,491

Deferred Charges
  Regulatory assets                                    178,864      154,291
  Other                                                 29,525       19,151
                                                       208,389      173,442


                                                    $1,485,050   $1,428,955



















The accompanying notes are an integral part of these consolidated financial
statements.
<PAGE 34>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

                          CONSOLIDATED BALANCE SHEETS

                          DECEMBER 31, 1997 AND 1996

                            (Dollars in thousands)

                                                       1997        1996

Capitalization and Liabilities

Capitalization (See separate statement)
  Common share investment                           $  430,770   $  415,694
  Redeemable preferred shares, less current
    sinking fund requirements                           12,200       13,020
  Long-term debt, less current sinking fund
    requirements and maturing debt                     364,311      355,305
                                                       807,281      784,019

Capital Lease Obligations                               12,272       12,346


Current Liabilities
  Interim Financing-
    Notes payable to banks                              94,075      118,475
    Maturing long-term debt                             19,000       14,260
                                                       113,075      132,735

  Other Current Liabilities-
    Current sinking fund requirements                    8,473        8,473
    Accounts payable                                   107,157       90,269
    Accrued taxes-
      Local property and other                           9,795        9,060
      Income                                            14,410        7,910
    Accrued interest                                     6,778        6,267
    Dividends declared                                   8,517        8,289
    Other                                               43,627       39,279
                                                       198,757      169,547
                                                       311,832      302,282


Deferred Credits
  Accumulated deferred income taxes                    176,354      174,877
  Nuclear units' purchased power contracts              69,659       43,677
  Unamortized investment tax credits                    25,340       26,618
  Other                                                 82,312       85,136
                                                       353,665      330,308


Commitments and Contingencies


                                                    $1,485,050   $1,428,955












The accompanying notes are an integral part of these consolidated financial
statements.
<PAGE 35>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

                     CONSOLIDATED STATEMENTS OF CASH FLOWS

             FOR THE YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995

                            (Dollars in thousands)

                                                   1997       1996      1995

Operating Activities
  Net income                                    $ 49,901   $ 59,175  $ 51,396
  Effects of noncash items-
    Depreciation and amortization                 65,646     63,331    60,555
    Deferred income taxes, net                     2,542      3,515     4,182
    Investment tax credits, net                   (1,278)    (1,285)   (1,401)
    Earnings from corporate joint ventures        (1,348)    (1,557)   (1,633)
  Dividends from corporate joint ventures          1,272      1,376     2,067
  Change in working capital, exclusive of cash-
    Accounts receivable and unbilled revenues    (12,269)    (9,446)  (13,626)
    Prepaid (accrued) income taxes                 6,500    (14,097)   14,353
    Prepaid (accrued) local property and
      other taxes                                    532       (555)     (950)
    Accounts payable and other                    20,756    (33,956)   25,199
  Power contract buy-out                             -          -     (25,500)
  Fuel charge stabilization deferral, net         (5,543)     2,372    (3,447)
  Deferred postretirement benefits costs          (2,126)    (2,157)   (4,479)
  FERC Order 636 transition costs, net               -          -      11,390
  All other operating items                      (17,034)    (3,391)    6,565
Net cash provided by operating activities        107,551     63,325   124,671

Investing Activities
  Additions to property, plant and
    equipment (inclusive of AFUDC)-
      Electric                                   (34,524)   (38,844)  (61,643)
      Gas                                        (18,230)   (11,611)  (16,198)
      Other                                       (4,804)    (2,730)   (3,659)
Net cash used for investing activities           (57,558)   (53,185)  (81,500)

Financing Activities
  Sale of common shares                              -           32     9,534
  Payment of dividends                           (35,056)   (34,205)  (33,142)
  Proceeds from (payment of) short-term
    borrowings, net                              (24,400)    62,875    10,750
  Long-term debt issues                           35,000        -         -  
  Retirement of long-term debt and preferred
    shares through sinking funds                  (8,473)    (8,436)   (8,716)
  Long-term debt issues refunded                 (14,260)   (33,230)  (25,000)
Net cash used for financing activities           (47,189)   (12,964)  (46,574)

Net increase (decrease) in cash                    2,804     (2,824)   (3,403)
Cash at beginning of period                        1,495      4,319     7,722
Cash at end of period                           $  4,299   $  1,495  $  4,319

Supplemental Disclosures of Cash Flow Information
  Cash paid during the period for:
    Interest (net of capitalized amounts)       $ 38,201   $ 41,294  $ 42,051
    Income taxes                                $ 24,436   $ 46,563  $ 12,918







The accompanying notes are an integral part of these consolidated financial
statements.
<PAGE 36>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

                   CONSOLIDATED STATEMENTS OF CAPITALIZATION

                          DECEMBER 31, 1997 AND 1996

                            (Dollars in thousands)

                                                         1997       1996
Common Share Investment
  Common shares, $2 par value-
    Authorized-50,000,000 shares
    Outstanding-21,531,784 shares in 1997
      and 21,529,676 shares in 1996                   $ 43,063    $ 43,059
    Amounts paid in excess of par value                111,912     111,685
    Retained earnings                                  275,795     260,950
      Total common share investment                    430,770     415,694

Redeemable Preferred Shares,
  Cumulative, $100 Par Value
    Series A, 4.80%                                      2,520       2,640
    Series B, 8.10%                                      3,840       4,000
    Series C, 7.75%                                      6,660       7,200
    Less-Current sinking fund requirements                (820)       (820)
      Total redeemable preferred shares                 12,200      13,020

Long-term Debt
  System
    Senior Notes due-
      1997, 10.48%                                         -        10,000
      1998, 10.45%                                      10,000      10,000
      1999, 10.58%                                      10,000      10,000
      Less-Maturing long-term debt                     (10,000)    (10,000)
        Total System long-term debt                     10,000      20,000

  Subsidiary companies
    Mortgage Bonds, collateralized by property of
      operating subsidiaries, due-
        2001, 8.99%                                     14,450      18,100
        2006, 8.85%                                     34,300      34,650
        2007, 6.54%                                     10,000         -  
        2017, 7.04%                                     25,000         -  
        2020, 7 3/8%                                    10,000      10,000
        2020, 9 7/8%                                    40,000      40,000
        2020, 9.95%                                     25,000      25,000
        2033, 7.11%                                     35,000      35,000

    Notes due- 
        1997, 6 1/4%                                       -         4,260
        1998, variable rate (6.391% in 1997 and
                6.125% in 1996)                          9,000       9,000
        1999, 8.04%                                     10,000      10,000
        2002, 7 3/4%                                     2,500       2,600
        2002, 9.30%                                     30,000      30,000
        2003, 7.43%                                     15,000      15,000
        2004, 9.50%                                     10,000      12,500
        2007, 8.70%                                      5,000       5,000
        2007, 9.55%                                     10,000      10,000
        2008, 7.70%                                     10,000      10,000
        2012, 9.37%                                     15,789      16,842
        2013, 7.98%                                     25,000      25,000
        2014, 9.53%                                     10,000      10,000
        2019, 9.60%                                     10,000      10,000
        2023, 8.47%                                     15,000      15,000
        Less-Maturing long-term debt                    (9,000)     (4,260)
             Current sinking fund requirements          (7,653)     (7,653)
             Unamortized discount, net                     (75)       (734)
        Total subsidiary companies' long-term debt     354,311     335,305

        Total long-term debt                           364,311     355,305

          Total capitalization                        $807,281    $784,019


The accompanying notes are an integral part of these consolidated financial
statements.
<PAGE 37>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

     CONSOLIDATED STATEMENTS OF CHANGES IN COMMON SHAREHOLDERS' INVESTMENT

             FOR THE YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995

                                                   Amounts
                                           Par     Paid in
                                           Value   Excess
                                           $2 Per  of Par   Retained
                                 Shares    Share   Value    Earnings  Total
                                           (Dollars in thousands)

Balance December 31, 1994       21,051,794 $42,103 $103,168 $217,726 $362,997
Add (Deduct)-
 Net income                            -       -        -     51,396   51,396
 Sale of shares                    476,474     953    8,581      -      9,534
 Cash dividends declared-
  Common shares-$1.50 per share        -       -        -    (32,032) (32,032)
  Preferred shares                     -       -        -     (1,110)  (1,110)
Balance December 31, 1995       21,528,268  43,056  111,749  235,980  390,785
Add (Deduct)-
 Net income                            -       -        -     59,175   59,175
 Sale of shares                      1,408       3       29      -         32
 Cost of stock split                   -       -        (93)     -        (93)
 Cash dividends declared-
  Common shares-$1.54 per share        -       -        -    (33,155) (33,155)
  Preferred shares                     -       -        -     (1,050)  (1,050)
Balance December 31, 1996       21,529,676  43,059  111,685  260,950  415,694
Add (Deduct)-
 Net income                            -       -        -     49,901   49,901
 Shares issued pursuant to
  Long-Term Incentive
  Compensation Plan                  2,108       4       43      -         47
 Amortization of deferred
  compensation                         -       -        184      -        184
 Cash dividends declared-
  Common shares-$1.58 per share        -       -        -    (34,068) (34,068)
  Preferred shares                     -       -        -       (988)    (988)
Balance December 31, 1997       21,531,784 $43,063 $111,912 $275,795 $430,770




        Consolidated Statements of Changes in Redeemable Preferred Shares
               Commonwealth Energy System and Subsidiary Companies
              For the Years Ended December 31, 1997, 1996 and 1995

                                           Authorized and Outstanding
                                   Cumulative Preferred Shares-$100 Par Value

                                     Series A   Series B   Series C    Total
                                      4.80%      8.10%      7.75%      Shares

Balance December 31, 1994            28,800     43,200      82,800    154,800
    Less-Sinking fund redemptions     1,200      1,600       5,400      8,200
Balance December 31, 1995            27,600     41,600      77,400    146,600
    Less-Sinking fund redemptions     1,200      1,600       5,400      8,200
Balance December 31, 1996            26,400     40,000      72,000    138,400
    Less-Sinking fund redemptions     1,200      1,600       5,400      8,200
Balance December 31, 1997            25,200     38,400      66,600    130,200






The accompanying notes are an integral part of these consolidated financial
statements.
<PAGE 38>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

                  NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(1)   General Information

      Commonwealth Energy System (the System) is an exempt public utility
holding company with investments in four operating public utility companies
located in central, eastern and southeastern Massachusetts.  The System is the
parent company and, together with its subsidiaries, is collectively referred
to as "the system."  System electric operations are involved in the produc-
tion, distribution and sale of electricity to 367,000 customers in 41 communi-
ties including New Bedford, Plymouth, Cambridge and the geographic area
comprising Cape Cod.  Gas operations serve 237,000 customers in 49 communities
including New Bedford, Cambridge, Plymouth and Worcester.  In addition to the
utility companies, the system includes a steam distribution company, five real
estate trusts, a company engaged in the operation of LNG facilities and three
new subsidiaries that are pursuing energy-related business opportunities.

      The system has 1,727 regular employees including 1,037 (60%) represented
by various collective bargaining units.  A contract with a collective bargain-
ing unit representing approximately 5% of regular employees that was scheduled
to expire in May 1997 was ratified in April 1997 and is effective through May
31, 2001.  In April 1998, a collective bargaining contract representing
approximately 5% of regular employees is scheduled to expire and two addition-
al contracts (together representing approximately 7% of regular employees) are
scheduled to expire in September 1998.

      During the second quarter of 1997, the system initiated a voluntary
personnel reduction program.  As a result of this program, the total number of
regular employees has declined by approximately 13% in 1997.

(2)   Significant Accounting Policies

      (a)  Principles of Consolidation and Accounting

      The consolidated financial statements include the accounts of the System
and all of its subsidiary companies.  All significant intercompany accounts
and transactions have been eliminated in consolidation.

      The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities at the date of the financial
statements and the reported amounts of revenues and expenses during the
reporting period.  Actual results could differ from those estimates.

      Certain prior year amounts are reclassified from time to time to conform
with the presentation used in the current year's financial statements.

      (b)  Regulatory Assets and Liabilities

      The system's operating utility companies are regulated as to rates,
accounting and other matters by various authorities, including the Federal
Energy Regulatory Commission (FERC) and the Massachusetts Department of
Telecommunications and Energy (DTE), formerly the Massachusetts Department of
Public Utilities.

      Based on the current regulatory framework, the system accounts for the
economic effects of regulation in accordance with the provisions of Statement
of Financial Accounting Standards (SFAS) No. 71, "Accounting for the Effects
of Certain Types of Regulation."  Regulated subsidiaries of the System have
established various regulatory assets in cases where the DTE and/or the FERC
have permitted or are expected to permit recovery of specific costs over time. 
Similarly, the regulatory liabilities established by the system are required
to be refunded to customers over time.  In the event the criteria for applying
SFAS No. 71 are no longer met, the accounting impact would be an extra-
ordinary, non-cash charge to operations of an amount that could be material.
<PAGE 39>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

Criteria that give rise to the discontinuance of SFAS No. 71 include: 1)
increasing competition that restricts the system's ability to establish prices
to recover specific costs, and 2) a significant change in the current manner
in which rates are set by regulators from cost based regulation to another
form of regulation.  These criteria are reviewed on a regular basis to ensure
the continuing application of SFAS No. 71 is appropriate.  Based on the
current evaluation of the various factors and conditions that are expected to
impact future cost recovery, the system believes that its regulatory assets,
including those related to generation, are probable of future recovery.

      As a result of electric industry restructuring, the system's retail
electric companies discontinued application of accounting principles applied
to their investment in electric generation facilities effective March 1, 1998. 
The system will not be required to write off any of its generation-related
assets, including regulatory assets.  These assets will be retained on the
Consolidated Balance Sheets because the legislation and the DTE's plan for a
restructured electric industry specifically provide for their recovery through
a non-bypassable transition charge.

      Effective January 1, 1996, the system adopted SFAS No. 121, "Accounting
for the Impairment of Long-Lived Assets and for Long-Lived Assets to be
Disposed Of."  SFAS No. 121 imposes stricter criteria for regulatory assets by
requiring that such assets be probable of future recovery at each balance
sheet date.  SFAS No. 121 did not have an impact on the system's financial
position or results of operations upon adoption.

      The principal regulatory assets included in deferred charges at December
31, 1997 and 1996 were as follows:
                                                         1997        1996
                                                      (Dollars in thousands)

      Postretirement benefit costs                     $ 25,475    $ 25,051
      Power contract buy-out                             17,609      20,794
      Fuel charge stabilization                          29,655      21,504
      Deferred income taxes                              13,089      13,597
      FERC Order 636 transition costs                     7,336       9,680
      Maine Yankee unrecovered plant and 
         decommissioning costs                           34,908         -  
      Connecticut Yankee unrecovered plant and
         decommissioning costs                           28,566      35,879
      Yankee Atomic unrecovered plant and
         decommissioning costs                            6,184       7,798
      Seabrook related costs                              4,324       6,262
      Other                                              11,718      13,726
                                                       $178,864    $154,291

      The regulatory liabilities, reflected in the accompanying Consolidated
Balance Sheets and related primarily to deferred income taxes, were $14.1
million and $17.7 million at December 31, 1997 and 1996, respectively.

      As of December 31, 1997, $143.1 million of the system's regulatory
assets, including the costs associated with existing power contracts with
three Yankee nuclear power plants that have shut down permanently (see Note
3(d)), and all of its regulatory liabilities are reflected in rates charged to
customers.  Regulatory assets are currently being recovered over a weighted
average period of approximately 11 years.  The fuel charge stabilization
deferral was expected to be recovered over a six-year period beginning in
April 1998, pursuant to a yet to be determined recovery schedule and subject
to final DTE approval.

      In November 1997, the Commonwealth of Massachusetts enacted a comprehen-
sive electric utility industry restructuring bill.  On November 19, 1997, the
System's electric subsidiaries filed a restructuring plan with the DTE.  The
plan, approved by the DTE on February 27, 1998, describes the process by which
the System's retail electric subsidiaries will, beginning March 1, 1998,
initiate a ten percent rate reduction for all customer classes and allow 
<PAGE 40>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

customers to choose their energy supplier.  As part of the plan, the DTE
authorized the recovery of certain strandable costs.  The legislation gives
the DTE the authority to determine the amount of strandable costs that will be
eligible for recovery.  Costs that will qualify as strandable costs and be
eligible for recovery include, but are not limited to, certain above market
costs associated with generating facilities, costs associated with long-term
commitments to purchase power at above market prices from independent power
producers and regulatory assets and associated liabilities related to the
generation portion of the electric business.

      The cost of transitioning to competition will be mitigated, in part,
through the divestiture of the system's non-nuclear generating assets in an
auction process that is expected to be completed in 1998.  Any net proceeds in
excess of book value received from the divestiture of these assets will be
used to mitigate stranded costs.

      The system's ability to recover its stranded costs will depend on
several factors, including the aggregate amount of stranded costs the system
will be allowed to recover and the market price of electricity.  Management
believes that the system will recover its stranded costs.  A change in any of
the above listed factors or in the current legislation could affect the
recovery of stranded costs and may result in a loss to the system.  For
additional information relating to industry restructuring, see the "Industry
Restructuring - Electric" section under Management's Discussion and Analysis
of Financial Condition and Results of Operations.

      (c)  Equity Method of Accounting

      The system uses the equity method of accounting for investments in
corporate joint ventures due, in part, to its ability to exercise significant
influence over operating and financial policies of these entities.  Under this
method, it records as income the proportionate share of the net earnings of
the joint ventures with a corresponding increase in the carrying value of the
investment.  The investment is reduced as cash dividends are received.  The
system conducts business with the corporate joint ventures in which it has
investments, principally four nuclear generating facilities located in New
England and a 3.8% interest in Hydro-Quebec Phase II.

      (d)  Operating Revenues

      Customers are billed for their use of electricity and gas on a cycle
basis throughout the month.  To reflect revenues in the proper period, the
estimated amount of unbilled sales revenue is recorded each month.

      System utility companies are generally permitted to bill customers for
costs associated with purchased power and transmission, fuel used in electric
production, gas, conservation and load management and environmental costs. 
The amount of such costs incurred but not yet reflected in customers' bills is
recorded as unbilled revenues.

      (e)  Depreciation

      Depreciation is provided using the straight-line method at rates
intended to amortize the original cost and the estimated cost of removal less
salvage of properties over their estimated economic lives. The average
composite depreciation rates were as follows: 

                                    1997     1996      1995

      Electric                      3.66%    3.65%     3.52%
      Gas                           2.95     2.94      2.90
      Steam                         3.80     3.89      3.91
      LNG                           3.65     3.59      3.20



<PAGE 41>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES


      (f)  Allowance for Funds Used During Construction

      Under applicable rate-making practices, system companies are permitted
to include an allowance for funds used during construction (AFUDC) as an
element of their depreciable property costs.  This allowance is based on the
amount of construction work in progress that is not included in the rate base
on which utility companies earn a return.  An amount equal to the AFUDC 
capitalized in the current period is reflected in other interest charges in
the accompanying Consolidated Statements of Income and amounted to $368,000,
$257,000 and $857,000 in 1997, 1996 and 1995, respectively.

      While AFUDC does not provide funds currently, these amounts are recover-
able in revenues over the service life of the constructed property.  The
amount of AFUDC recorded was at a weighted average rate of 6.1% in 1997, 6.2%
in 1996 and 7.1% in 1995.

      (g) Earnings Per Share

      The System adopted SFAS No. 128 "Earnings Per Share" for the year ended
December 31, 1997.  SFAS No. 128 requires the presentation of both basic and
diluted earnings per share (EPS).  Diluted EPS reflect the possible impact on
EPS that could occur if securities or other contracts to issue common stock
were exercised or converted into common stock or resulted in the issuance of
common stock that then shared in the earnings of the entity.  The System
granted potential awards in the form of common shares to certain key employees
pursuant to its Long Term Incentive Compensation Plan (see Note 5(d)) during
the first quarter of 1997.  The adoption of SFAS No. 128 did not have a
material impact on the System's EPS.

(3) Commitments and Contingencies

      (a)  Capital Expenditures

      The system is engaged in a continuous construction program presently
estimated at $248.6 million for the five-year period 1998 through 2002.  Of
that amount, $60.7 million is estimated for 1998.  The program is subject to
periodic review and revision.

      The system, through its Advanced Energy Systems, Inc. subsidiary,
tentatively agreed to purchase a total energy plant located in the Longwood
Medical Area of Boston for $146.3 million.  This transaction is expected to be
closed in the second quarter of 1998.  Revenues for fiscal years ended June
30, 1997 and 1996 were $58 million and $53.9 million, respectively.

      (b)  Seabrook Nuclear Power Plant

      The system's 3.52% interest in the Seabrook nuclear power plant is owned
by Canal Electric Company (Canal Electric), a wholesale electric generating
subsidiary, to provide for a portion of the capacity and energy needs of
affiliates Cambridge Electric Light Company (Cambridge Electric) and Common-
wealth Electric Company (Commonwealth Electric).  Canal Electric is recovering
100% of its Seabrook 1 investment through a power contract with Cambridge
Electric and Commonwealth Electric pursuant to FERC and DTE approval.












<PAGE 42>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

      Pertinent information with respect to Canal Electric's joint-ownership
interest in Seabrook 1 and information relating to operating expenses that are
included in the accompanying financial statements are as follows:

                               1997      1996
                           (Dollars in thousands)

     Utility plant-in-
       service               $232,471  $232,183  Plant capacity (MW)    1,150
     Nuclear fuel              22,207    21,613  Canal Electric's share:
     Accumulated depreciation                      Percent interest      3.52%
       and amortization       (64,379)  (57,359)   Entitlement (MW)      40.5
     Construction work in                        In-service date         1990
       progress                 1,036       844  Operating license
                             $191,335  $197,281    expiration date       2026

                                1997      1996      1995
                                 (Dollars in thousands)
      Operating expenses:
        Fuel                  $ 1,471   $ 1,727   $ 2,353
        Other operation         4,206     4,091     4,292
        Maintenance             2,364       990     1,376
        Depreciation            6,314     6,544     6,542
        Amortization            1,319     1,319     1,319
                              $15,674   $14,671   $15,882

      Canal Electric and the other joint owners have established a decommis-
sioning fund to cover decommissioning costs.  The estimated cost to decommis-
sion the plant is $469.1 million in current dollars.  Canal Electric's share
of this liability (approximately $16.5 million), less its share of the market
value of the assets held in a decommissioning trust (approximately $2.5
million), is approximately $14 million at December 31, 1997.

      (c) Price-Anderson Act

      Under the Price-Anderson Act (the Act), owners of nuclear power plants
have the benefit of approximately $8.9 billion of public liability coverage
which would compensate the public for valid bodily injury and property loss on
a no fault basis in the event of an accident at a commercial nuclear power
plant.  Under the provisions of the Act, each nuclear reactor with an operat-
ing license can be assessed up to $79.3 million per nuclear incident with a
maximum assessment of $10 million per incident within one calendar year. 
Nuclear plant owners have initiated insurance programs designed to help cover
liability claims relating to property damage, decontamination, replacement
power and business interruption costs for participating utilities arising from
a nuclear incident.

      The system has an equity ownership interest in four nuclear generating
facilities as well as a 3.52% joint-ownership interest in Seabrook 1.  The
operators of these units maintain nuclear insurance coverage (on behalf of the
owners of the facilities) with Nuclear Electric Insurance Limited (NEIL II)
and the combined American Nuclear Insurers/Mutual Atomic Energy Liability
Underwriters (ANI).  NEIL II provides $2.25 billion of property, boiler,
machinery and decontamination insurance coverage, including accidental
premature decommissioning insurance in the amount of the shortfall in the
Decommissioning Trust Fund, in excess of the underlying $500 million policy. 
All companies insured with NEIL II are subject to retroactive assessments if
losses exceed the accumulated funds available.  ANI provides $500 million of
"all risk" property damage, boiler, machinery and decontamination insurance.
An additional $200 million of primary financial protection coverage is
provided for off-site bodily injury or property damage caused by a nuclear
incident.  ANI also provides secondary financial protection liability insur-
ance which currently provides $8.7 billion of retrospective insurance premium
benefits in accordance with the provisions of the Act.  Additional coverage
($200 million) provided by ANI includes tort liability protection arising out
<PAGE 43>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

of radiation injury claims by nuclear workers and injury or property damage
caused by the transportation or shipment of nuclear materials or waste.

      Based on its various ownership interests in the five nuclear generating
facilities, the system's retrospective premium could be as high as $1.9
million annually or a cumulative total of $15.1 million, exclusive of the
effect of inflation indexing (at five-year intervals) and a 5% surcharge ($4
million) in the event that total public liability claims from a nuclear
incident exceed the funds available to pay such claims.

      (d)  Power Contracts

      The system has long-term contracts to purchase capacity from various
generating facilities.  Generally, these contracts are for fixed periods and
require payment of a demand charge for the capacity entitlement and an energy
charge to cover the cost of fuel.  Information relative to these contracts is
as follows:

                  Range of
                  Contract
                 Expiration     Entitlement                 Cost             
                   Dates         %       MW      1997       1996       1995  
                                                   (Dollars in thousands)
Type of Unit
Natural gas       2008-2017    (a)      208.6  $127,580   $120,842   $121,636
Nuclear             2012       (b)       85.1    41,058     41,280     44,379
Waste-to-energy     2015       100.0     67.0    43,038     39,622     37,526
Hydro             2014-2023    100.0     23.9    10,952     12,537      9,933
  Total                                 384.6  $222,628   $214,281   $213,474

  (a) Includes contracts to purchase power from various non-utility generators
      with capacity entitlements ranging from 11.1% to 100%.

  (b) The system has an 11% entitlement in the Pilgrim nuclear power plant and
      a 2.5% ownership interest in the Vermont Yankee nuclear power plant. 
      The estimated cost to decommission this plant is $385.9 million in
      current dollars.  The system's share of this liability (approximately
      $8.7 million), less its share of the market value of the assets held in
      a decommissioning trust (approximately $4.4 million), is approximately
      $4.3 million at December 31, 1997.

      Pertinent information with respect to life-of-the-unit contracts with
nuclear units that are no longer operating in which the system has an equity
ownership is as follows:

                                          Connecticut    Maine     Yankee
                                             Yankee      Yankee    Atomic
                                               (Dollars in thousands)

Equity Ownership (%)                           4.50       4.00       4.50
Plant Entitlement (%)                          4.50       3.59       4.50
Contract Expiration Date                       2007       2008       2000
Year of Shutdown                               1996       1997       1992
1995 Actual Cost ($)                          9,498      7,376      2,023
1996 Actual Cost ($)                          9,259      6,511      2,260
1997 Actual Cost ($)                          5,760      8,928      2,238
Decommissioning cost estimate (100%) ($)    437,270    386,046    137,428
System's decommissioning cost ($)            19,677     13,859      6,184
Market value of assets (100%) ($)           209,448    199,457    134,143
System's market value of assets ($)           9,425      7,161      6,036

      Based upon regulatory precedent, the operators of the Yankee units
believe they will be permitted to continue to collect from power purchasers
(including system companies) decommissioning costs, unrecovered plant invest-
ment and other costs associated with the permanent closure of these plants
over the remaining period of each plant's operating license.  The system does 
<PAGE 44>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

not believe that the ultimate outcome of the early closing of these plants
will have a material adverse effect on its operations and believes that
recovery of these FERC-approved costs would continue to be allowed in its
rates at the retail level.

      Costs pursuant to these power contracts are included in electricity
purchased for resale in the accompanying Consolidated Statements of Income and
are recoverable in revenues.

      The estimated aggregate obligations for capacity under the long-term
purchased power contracts and a life-of-the-unit contract from the one
remaining operating Yankee nuclear unit (Vermont Yankee) in effect for the
five years subsequent to 1997 is as follows:

                            Long-Term
                            Purchased    Equity Owned
                              Power      Nuclear Unit      Total
                                   (Dollars in thousands)

          1998              $219,909         $4,957      $224,866
          1999               223,490          5,001       228,491
          2000               225,513          4,311       229,824
          2001               233,576          4,806       238,382
          2002               235,228          4,996       240,224

      Due to changing conditions within the nuclear industry, it is possible
that the remaining operating nuclear plant in which the system has an equity
ownership interest could be shut down prior to the expiration of that unit's
operating license.

      The costs associated with these power contract obligations are a
significant component of the system's stranded costs that are included in the
system's restructuring plan approved by the DTE.

      (e) Environmental Matters

      The system is subject to laws and regulations administered by federal,
state and local authorities relating to the quality of the environment.  These
laws and regulations affect, among other things, the siting and operation of
electric generating and transmission facilities and can require the installa-
tion of expensive air and water pollution control equipment.  These regula-
tions have had an impact on the system's operations in the past and would
continue to have an impact on future operations, capital costs and construc-
tion schedules of major facilities; however, the electric generating facili-
ties are likely to be sold at auction in 1998 pursuant to the restructuring
plan filed with the DTE.  For additional environmental information, see
"Environmental Matters" in Management's Discussion and Analysis of Financial
Condition and Results of Operations.

(4)   Income Taxes

      The system files a consolidated federal income tax return.  For finan-
cial reporting purposes, the System and its subsidiaries provide taxes on a
separate return basis.
<PAGE 45>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

      The following is a summary of the consolidated provisions for income
taxes for the years ended December 31, 1997, 1996 and 1995:

                                               1997        1996       1995
                                                (Dollars in thousands)
      Federal
          Current                             $24,396     $28,375    $15,954
          Deferred                              2,612       2,784      8,231
          Investment tax credits, net          (1,278)     (1,285)    (1,401)
                                               25,730      29,874     22,784
      State
          Current                               5,389       5,542      4,176
          Deferred                                316         890      1,115
                                                5,705       6,432      5,291
                                               31,435      36,306     28,075
      Amortization of regulatory liability
          relating to deferred income taxes      (386)       (159)    (5,164)
                                              $31,049     $36,147    $22,911
      Federal and state income taxes
          charged to:
            Operating expense                 $31,040     $36,099    $24,574
            Other (income) expense                  9          48     (1,663)
                                              $31,049     $36,147    $22,911

      Deferred tax liabilities and assets are determined based on the differ-
ence between the financial statement and tax bases of assets and liabilities
using enacted tax rates in effect in the year in which the differences are
expected to reverse.

      In May 1995, Canal Electric refunded certain unprotected excess deferred
taxes to Commonwealth Electric and Cambridge Electric resulting in a reduction
to the 1995 tax provision.

      Accumulated deferred income taxes consisted of the following in 1997 and
1996:
                                                  1997        1996
                                                (Dollars in thousands)
      Liabilities
          Property-related                      $198,183    $195,810
          Power contract buy-out                   6,853      10,002
          Fuel charge stabilization               12,241       8,124
          Postretirement benefits plan             7,742       7,442
          Seabrook nonconstruction                   707       1,183
          All other                               16,140      20,018
                                                 241,866     242,579
      Assets
          Investment tax credits                  16,058      17,205
          Pension plan                             6,409       8,528
          Regulatory liability                     6,103       6,352
          Personnel reduction program              1,540         -  
          All other                               20,960      22,239
                                                  51,070      54,324
      Accumulated deferred income taxes, net    $190,796    $188,255

      The net year-end deferred income tax liability above includes a current
deferred tax liability of $14,442,000 and $13,378,000 in 1997 and 1996,
respectively, which are included in accrued income taxes in the accompanying
Consolidated Balance Sheets.

      The total income tax provision set forth previously represents 38% in
1997 and 1996 and 31% in 1995 of income before such taxes.  The following
table reconciles the statutory federal income tax rate to these percentages:
<PAGE 46>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

                                                  1997      1996      1995
                                                   (Dollars in thousands)

      Federal statutory rate                          35%       35%       35%

      Federal income tax expense at statutory
        levels                                   $28,332   $33,363   $26,007
      Increase (Decrease) from statutory levels:
        State tax net of federal tax benefit       3,708     4,181     3,439
        Tax versus book depreciation               1,714     1,553     1,369
        Amortization of investment tax credits    (1,278)   (1,285)   (1,368)
        Reversals of capitalized expenses           (654)     (654)     (652)
        Dividend received deduction                 (366)     (381)     (389)
        Amortization of excess deferred reserves    (386)     (159)   (5,164)
        Other                                        (21)     (471)     (331)
                                                 $31,049   $36,147   $22,911

        Effective federal income tax rate             38%       38%       31%

(5)  Employee Benefit Plans

      (a) Pension

      The system has a noncontributory pension plan covering substantially all
regular employees who have attained the age of 21 and have completed a year of
service. Pension benefits are based on an employee's years of service and
compensation.  The system makes monthly contributions to the plan consistent
with the funding requirements of the Employee Retirement Income Security Act
of 1974.

      Components of pension expense and related assumptions to develop pension
expense were as follows:

                                            1997        1996        1995
                                               (Dollars in thousands)

      Service cost                        $  7,565    $  7,663    $  6,386
      Interest cost                         24,824      24,462      23,949
      Return on plan assets-(gain)/loss    (61,094)    (45,961)    (62,933)
      Net amortization and deferral         37,540      24,520      42,928
        Total pension expense                8,835      10,684      10,330
      Less: Amounts capitalized
            and deferred                     3,017       2,203       1,842
        Net pension expense               $  5,818    $  8,481    $  8,488

      Discount rate                         7.50%       7.25%       8.50%
      Assumed rate of return                8.75        8.75        9.00
      Rate of increase in future
        compensation                        4.25        4.25        5.00

      Pension expense reflects the use of the projected unit credit method
which is also the actuarial cost method used in determining future funding of
the plan.  Commonwealth Electric and Cambridge Electric, in accordance with
current ratemaking, are deferring the difference between pension contribution
which is reflected in base rates, and pension expense.  The funded status of
the system's pension plan (using a measurement date of December 31) is as
follows:









<PAGE 47>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

                                                 1997          1996
                                               (Dollars in thousands)

      Accumulated benefit obligation:
        Vested                                 $(331,170)    $(254,888)
        Nonvested                                (40,822)      (30,604)
                                               $(371,992)    $(285,492)

      Projected benefit obligation             $(409,039)    $(340,850)
      Plan assets at fair market value           390,625       343,884
        Projected benefit obligation less
          or (greater) than plan assets          (18,414)        3,034
      Unamortized transition obligation            6,429         8,036
      Unrecognized prior service cost             11,922        13,357
      Unrecognized gain                          (20,480)      (43,918)
        Accrued pension liability              $ (20,543)    $ (19,491)

      The following actuarial assumptions were used in determining the plan's
year-end funded status:
                                                 1997          1996

      Discount rate                              7.00%         7.50%
      Rate of increase in future compensation    3.75          4.25

      Plan assets consist primarily of fixed-income and equity securities.
Fluctuations in the fair market value of plan assets will affect pension
expense in future years.

      (b)  Other Postretirement Benefits

      Certain employees are eligible for postretirement benefits if they meet
specific requirements.  These benefits could include health and life insurance
coverage and reimbursement of Medicare Part B premiums.  Under certain
circumstances, eligible employees are required to make contributions for
postretirement benefits.

      To fund its postretirement benefits, the system makes contributions to
various voluntary employees' beneficiary association trusts that were estab-
lished pursuant to section 501(c)(9) of the Internal Revenue Code (the Code). 
The system also makes contributions to a subaccount of its pension plan
pursuant to section 401(h) of the Code to fund a portion of its postretirement
benefit obligation.  The system contributed approximately $12.2 million, $13.7
million and $14 million to these trusts during 1997, 1996 and 1995, respec-
tively.

      The net periodic postretirement benefit cost for the years ended
December 31, 1997, 1996 and 1995 includes the following components and related
assumptions:

                                                  1997      1996     1995
                                                  (Dollars in thousands)

      Service cost                              $ 1,919   $ 2,211  $ 1,774
      Interest cost                               9,223     9,352    9,022
      Return on plan assets                      (9,483)   (5,176)  (5,796)
      Amortization of transition obligation
        over 20 years                             5,336     5,336    5,336
      Net amortization and deferral               5,236     2,038    3,692
         Total postretirement benefit cost       12,231    13,761   14,028
      Less: Amounts capitalized and deferred        466     1,614    5,898
         Net postretirement benefit cost        $11,765   $12,147  $ 8,130

      Discount rate                               7.50%     7.25%    8.50%
      Assumed rate of return                      8.75      8.75     9.00
      Rate of increase in future compensation     4.25      4.25     5.00
<PAGE 48>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

      The funded status of the system's postretirement benefit plan using a
measurement date of December 31, 1997 and 1996 is as follows:

                                                        1997        1996
                                                     (Dollars in thousands)

      Accumulated postretirement benefit obligation:
        Retirees                                     $(102,485)  $ (72,827)
        Fully eligible active plan participants        (18,123)    (11,468)
        Other active plan participants                 (28,756)    (41,352)
                                                      (149,364)   (125,647)
      Plan assets at fair market value                  61,632      45,967
      Accumulated postretirement benefit obligation
         greater than plan assets                      (87,732)    (79,680)
      Unamortized transition obligation                 80,033      85,368
      Unrecognized (gain) loss                           7,699      (5,688)
                                                     $     -     $     -  

      The following actuarial assumptions were used in determining the plan's
estimated accumulated postretirement benefit obligation (APBO) and funded
status for 1997 and 1996:

                                                        1997        1996

      Discount rate                                     7.00%       7.50%
      Rate of increase in future compensation           3.75        4.25
      Medicare Part B premiums                          3.10        9.50
      Medical care                                      6.75        7.00
      Dental care                                       4.50        5.00

      The above dental rate remains constant through the year 2007.  Rates for
Medicare Part B premiums and medical care decrease to 3.1% and 4.5%, respec-
tively, by 2007 and remain at that level thereafter.  A one percent change in
the medical trend rate would have a $1.5 million impact on the system's annual
expense and would change the APBO by approximately $18.2 million.

      Plan assets consist primarily of fixed-income and equity securities.
Fluctuations in the fair market value of plan assets will affect postretire-
ment benefit expense in future years.

      Effective May 1, 1995 the DTE approved a settlement proposal sponsored
jointly by Commonwealth Electric and the Attorney General of Massachusetts
that allows Commonwealth Electric to fully recover costs relating to postreti-
rement benefits and to amortize its $8.6 million deferred balance over a ten-
year period.  In February 1996, FERC accepted for filing rate schedules that
provided for the recovery of Canal Electric's expense effective with its March
1996 contract billings including the recovery of previously deferred costs
over a six-month period.  On April 15, 1997, the DTE issued an accounting
ruling allowing Commonwealth Gas Company to include postretirement benefits
costs in cost-of-service and to amortize the deferred balance of $10.5 million
at March 31, 1997 associated with these costs over a period not to exceed ten
years that began in April 1997.

      (c) Savings Plan

      The system has an Employees Savings Plan that provides for system
contributions equal to contributions by eligible employees of up to four
percent of each employee's compensation rate and up to five percent for those
employees no longer eligible for postretirement health benefits.  The total
system contribution was $4,173,000 in 1997, $4,053,000 in 1996 and $4,393,000
in 1995.





<PAGE 49>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

      (d) Long-Term Incentive Compensation Plan

      The Long-Term Incentive Compensation Plan (the Plan), approved by
shareholders in 1994, was established to advance the interests of the System
by providing long-term financial incentives, primarily common shares of the
System, to selected key  employees of the system for achieving specified
objectives.  The System, in encouraging such share ownership, seeks to
attract, retain and motivate employees who hold positions of significant
responsibility.  Eligible employees are chosen by the Executive Compensation
Committee of the Board of Trustees and are presented grant share awards which
mature after a three-year vesting period.  Shares are issued to participants
in March following the close of the third plan year.  All shares are subject
to forfeiture if specified performance measures are not met.  During the
applicable vesting period, participants have all the voting, dividend and
other related rights of a record holder except that the shares are nontrans-
ferable.  Common shares granted under the Plan can not exceed 1% of the total
shares issued and outstanding.  In 1997, 31,606 common shares, valued at
approximately $707,000, were granted to system officers.  Compensation costs
of approximately $231,000 were recorded in 1997 with the remainder to be
recognized over the remaining vesting period of 26 months.  Common shares
granted pursuant to the Plan had no material impact on earnings per share.

(6)  Interim Financing and Long-Term Debt

      (a)  Notes Payable to Banks

      System companies maintain both committed and uncommitted lines of credit
for the short-term financing of their construction programs and other cor-
porate purposes.  As of December 31, 1997, system companies had $145 million
of committed lines of credit that will expire at varying intervals in 1998. 
These lines are normally renewed upon expiration and require annual fees of up
to .1875% of the individual line.  At December 31, 1997, the uncommitted lines
of credit totaled $10 million.  Interest rates on the outstanding borrowings
generally are at an adjusted money market rate and averaged 5.8% and 5.6% in
1997 and 1996, respectively.  Notes payable to banks totaled $94,075,000 and
$118,475,000 at December 31, 1997 and 1996, respectively.

      (b)  Long-term Debt Maturities and Retirements

      Under terms of various indentures and loan agreements, the System and
certain subsidiary companies are required to make periodic sinking fund
payments for retirement of outstanding long-term debt.  These payments and
balances of maturing debt issues for the five years subsequent to December 31,
1997 are as follows:

                   Sinking Funds    Maturing Debt Issues
      Year         Subsidiaries     System  Subsidiaries      Total
                                  (Dollars in thousands)

      1998             $7,653       $10,000     $ 9,000      $26,653
      1999              7,653        10,000      10,000       27,653
      2000              7,653           -           -          7,653
      2001              9,010           -         3,500       12,510
      2002              5,360           -        32,000       37,360

(7)   Redeemable Preferred Shares

      Each series of the System's preferred shares was issued at par value,
$100 per share, and is subject to periodic, mandatory sinking fund payments.
The System can make additional voluntary redemptions, not exceeding the requi-
red redemption, at par, on a non-cumulative basis, on each sinking fund date.




<PAGE 50>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

      Preferred shares may also be called for redemption, in whole or in
part, in excess of the required and voluntary sinking fund redemptions.  The
obligation to make mandatory redemptions is cumulative and the System is not
allowed to pay dividends to common shareholders or make optional sinking fund
payments if mandatory redemptions are in arrears.  Details of redemptions for
each series are contained in the following table:

                                   Sinking Funds          Optional
                  Dividend           1998-2002           Redemption
                    Rate      Mandatory     Optional     Call Prices
                              (Dollars in thousands)

      Series A     4.80%        $120          $120          $102
      Series B     8.10          160           160           101
      Series C     7.75          540           540           101

      Preferred shareholders have no voting rights except in the event that
six full quarterly dividends have not been paid.  In this circumstance, the
preferred shareholders are entitled, voting as a class, to elect two of the
nine Trustees of the System.

      The preference of these shares in involuntary liquidation is equal to
par value.  The shares are of equal rank and are entitled to cumulative
dividends at the annual rate established for each series.  No dividend can be
declared on any series unless proportionate dividends are concurrently
declared on the other outstanding series and in the event that dividend
payments are in arrears, the System may not redeem any shares unless all
shares of all preferred series are redeemed.

(8)   Disclosures About Fair Value of Financial Instruments

      The fair value of certain financial instruments included in the accom-
panying Consolidated Balance Sheets as of December 31, 1997 and 1996 are as
follows:

                                  1997                   1996   
                          Carrying      Fair      Carrying     Fair  
                            Value      Value        Value     Value  
                                     (Dollars in thousands)

      Long-term debt      $390,964   $444,970     $377,218  $417,411
      Preferred shares      13,020     14,708       13,840    14,601

      The carrying amount of cash and notes payable to banks approximates the
fair value because of the short maturity of these financial instruments.

      The estimated fair value of long-term debt and preferred stock are based
on quoted market prices of the same or similar issues or on the current rates
offered for debt or preferred shares with the same remaining maturity.  The
fair values shown above do not purport to represent the amounts at which those
obligations would be settled.

(9)   Lease Obligations

      System companies lease property, transmission facilities and equipment
under agreements, some of which are capital leases. Several subsidiaries
renegotiate certain lease agreements annually.  These new agreements are for a
term of one year and are renewable monthly thereafter.  COM/Energy Services
Company has agreements in effect for office furniture, computer and transpor-
tation equipment.  Generally, these agreements require the lessee to pay
related taxes, maintenance and other costs of operation.  Leases currently in
effect contain no provisions which prohibit system companies from entering
into future lease agreements or obligations.


<PAGE 51>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

      The following is a breakdown, by major class, of property under capital
lease at December 31, 1997 and 1996:

                                                         1997       1996
                                                     (Dollars in thousands)

      Transmission facilities                          $11,801    $12,454
      Office furniture, computer equipment and other     1,753      1,500
                                                        13,554     13,954
      Less: Accumulated amortization                        53         77
                                                       $13,501    $13,877

      Future minimum lease payments, by period and in the aggregate, of
capital leases and non cancelable operating leases consisted of the following
at December 31, 1997:
                                                      Capital   Operating
                                                      Leases      Leases 
                                                    (Dollars in thousands)

      1998                                            $ 2,603    $11,000
      1999                                              2,456      9,218
      2000                                              2,159      5,012
      2001                                              1,660      3,581
      2002                                              1,598      3,581
      Beyond 2002                                      17,128     11,672
      Total future minimum lease payments              27,604    $44,064
      Less: Estimated interest element
            included therein                           14,103
      Estimated present value of future minimum
            lease payments                            $13,501

      Total rent expense for all operating leases, except those with terms of
a month or less, amounted to $11,181,000 in 1997, $12,922,000 in 1996 and
$13,867,000 in 1995.  There were no contingent rentals and no sublease rentals
for the years 1997, 1996 and 1995.

(10)  Dividend Restriction

      At December 31, 1997, approximately $111,729,000 of consolidated
retained earnings was restricted against the payment of cash dividends by
terms of indentures and note agreements securing long-term debt.

(11)  Segment Information

      System companies provide electric, gas and steam services to retail
customers in communities located in central, eastern and southeastern Massa-
chusetts and, in addition, sell electricity at wholesale to Massachusetts
customers.  Other operations of the system include the development and
operation of rental properties and other activities which do not presently
contribute significantly to either revenues or operating income.

      Operating income of the various industry segments includes income from
transactions with affiliates and is exclusive of interest expense, income
taxes and equity in earnings of unconsolidated corporate joint ventures.

      The amount of identifiable assets represented by the system's investment
in corporate joint ventures consists principally of a percentage ownership in
the assets of four regional electric generating plants and a 3.8% interest in
Hydro-Quebec Phase II.







<PAGE 52>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES


                                             1997        1996        1995
                                               (Dollars in thousands)
  Revenues from
    Unaffiliated Customers
      Electric                            $  688,508  $  649,678  $  604,980
      Gas                                    333,977     341,867     306,953
      Steam and other                         19,259      19,360      17,355
        Total Revenues                    $1,041,744  $1,010,905  $  929,288

  Capital Expenditures (including AFUDC)
      Electric                            $   34,524  $   38,844  $   61,643
      Gas                                     18,230      11,611      16,198
      Other                                    4,804       2,730       3,659
                                          $   57,558  $   53,185  $   81,500

  Operating Income
    Before Income Taxes
      Electric                            $   84,828  $   92,374  $   78,817
      Gas                                     34,918      36,984      36,611
      Steam and other                         (1,056)      3,406       3,689
        Total Operating Income Before
          Income Taxes                    $  118,690  $  132,764  $  119,117

  Identifiable Assets
      Electric                            $1,049,094  $1,011,306  $  982,384
      Gas                                    395,966     388,930     374,615
      Steam and other                         74,298      58,081      57,269
                                           1,519,358   1,458,317   1,414,268
    Intercompany eliminations                (48,075)    (42,757)    (35,140)
    Investment in corporate joint
      ventures                                13,767      13,395      13,214
        Total Identifiable Assets         $1,485,050  $1,428,955  $1,392,342

  Depreciation Expense
      Electric                            $   41,103  $   39,977  $   36,977
      Gas                                     10,482      10,061       9,656
      Steam and other                          1,820       1,744       1,537
        Total Depreciation                $   53,405  $   51,782  $   48,170



<PAGE 53>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

                                   PART III.

Item 10. Trustees and Executive Officers of the Registrant

a. Trustees of the Registrant:

   Information required by this item is incorporated herein by reference to
   the Notice of 1998 Annual Meeting and Proxy Statement dated
   March 30, 1998, pages 3-4.

b. Executive Officers of the Registrant:
                                                                     Age at
                                                                    December
Name of Officer         Position and Business Experience            31, 1997

William G. Poist        President, Chief Executive Officer and          64
                        Trustee of the System and Chairman and
                        Chief Executive Officer of its principal
                        subsidiary companies since January 1,
                        1992; Vice President of the System and
                        COM/Energy Services Company* effective
                        September 1, 1991; President and Chief
                        Operating Officer of Commonwealth Gas
                        Company* from 1983 to 1991 and Hopkinton
                        LNG Corp.* from 1985 to 1991.

Russell D. Wright       Vice Chairman and Chief Executive Officer of    51
                        Utility Operations effective March 1, 1998;
                        President and Chief Operating Officer of
                        Commonwealth Gas Company* effective
                        February 6, 1997 and President and
                        Chief Operating Officer of Cambridge
                        Electric Light Company*, Canal Electric
                        Company*, COM/Energy Steam Company*,
                        and Commonwealth Electric Company* effective
                        March 1, 1993; Financial Vice President and
                        Treasurer of the System and Financial Vice
                        President of its subsidiary companies
                        from 1987 to 1993.

Deborah A. McLaughlin   President and Chief Operating Officer of        39
                        Utility Operations effective March 1, 1998;
                        Vice President of Customer Service for
                        Utility Operations from 1997 to 1998;
                        Vice President of Customer Service for
                        Cambridge Electric Light Company*, Canal
                        Electric Company*, COM/Energy Steam
                        Company*, and Commonwealth Electric
                        Company* from 1993 to 1997; Audit Manager
                        for COM/Energy Services Company* from
                        1987 to 1993.


    * Subsidiary of the System.
<PAGE 54>


              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

b. Executive officers of the Registrant (Continued):
                                                                     Age at
                                                                    December
Name of Officer         Position and Business Experience            31, 1997

James D. Rappoli        Financial Vice President and Treasurer of       46
                        the System and its subsidiary companies
                        effective March 1, 1993; Treasurer of System
                        subsidiary companies from 1990 to 1993;
                        Assistant Treasurer of System subsidiary
                        companies from 1989 to 1990.

Michael P. Sullivan     Vice President, Secretary, and                  49
                        General Counsel of the System
                        and subsidiary companies (effective
                        June 1993); Vice President, Secretary,
                        and General Attorney of the System and
                        subsidiary companies since 1981.

John R. Williams        Vice President of Corporate Services of         54
                        COM/Energy Services Company* (effective
                        December 2, 1996); Vice President of
                        Operations at Commonwealth Electric*
                        from 1993 to 1996; Vice President of
                        Human Resources and Communications at
                        COM/Energy Services Company* from 1990 to
                        1993; Vice President of Corporate Human
                        Resources at COM/Energy Services Company*
                        from 1987 to 1990.

    * Subsidiary of the System.

   The term of office for System officers expires May 7, 1998, the date of
the next Annual Organizational Meeting.

   There are no family relationships between any trustee and executive
officer and any other trustee or executive of the System.  There were no
arrangements or understandings between any officer or trustee and any other
person pursuant to which he was or is to be selected as an officer, trustee or
nominee.

   There have been no events under any bankruptcy act, no criminal pro-
ceedings and no judgments or injunctions material to the evaluation of the
ability and integrity of any trustee or executive officer during the past five
years.

Item 11.  Executive Compensation

   Information required by this item is incorporated herein by reference to
the Notice of 1998 Annual Meeting and Proxy Statement dated March 30, 1998,
pages 5-9.

Item 12.  Security Ownership of Certain Beneficial Owners and Management

   Information required by this item is incorporated herein by reference to 
the Notice of 1998 Annual Meeting and Proxy Statement dated March 30, 1998,
pages 2-4.

<PAGE 55>


              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

Item 13.  Certain Relationships and Related Transactions

   Information required by this item is incorporated herein by reference to
the Notice of 1998 Annual Meeting and Proxy Statement dated March 30, 1998,
pages 2-4.

                                   PART IV.

Item 14.    Exhibits, Financial Statement Schedules and Reports on Form 8-K

(a) 1.  Index to Financial Statements

    Consolidated financial statements and notes thereto of Commonwealth
    Energy System and Subsidiary Companies, together with the Report of
    Independent Public Accountants, are filed under Item 8 of this Form 10-K
    and listed on the Index to Financial Statements (page 31).

(a) 2.  Index to Financial Statement Schedules

              Commonwealth Energy System and Subsidiary Companies

    Filed herewith at page(s) indicated -

    Report of Independent Public Accountants on Schedules (page 68).

    Schedule I - Investments in, Equity in Earnings of, and Dividends Re-
    ceived from Related Parties - Years Ended December 31, 1997, 1996 and
    1995 (pages 69-71).

    Schedule II - Valuation and Qualifying Accounts - Years Ended December
    31, 1997, 1996 and 1995 (page 72).

    All other schedules have been omitted because they are not applicable,
    not required or because the required information is included in the
    financial statements or notes thereto.

    Subsidiaries not Consolidated and Fifty-Percent or Less Owned Persons

    Financial statements of 50% or less owned persons accounted for by the
    equity method have been omitted because they do not, considered individ-
    ually or in the aggregate, constitute a significant subsidiary.

    Form 11-K, Annual Reports of Employee Stock Purchases, Savings and
    Similar Plans

    Pursuant to Rule 15(d)-21 of the Securities and Exchange Act of 1934, the
    information, financial statements and exhibits required by Form 11-K with
    respect to the Employees Savings Plan of Commonwealth Energy System and
    Subsidiary Companies will be filed as an amendment to this report under
    cover of Form 10-K/A no later than April 30, 1998.




<PAGE 56>


              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

(a) 3.  Exhibits:
                              Notes to Exhibits -

  a.  Unless otherwise designated, the exhibits listed below are incorporated
      by reference to the appropriate exhibit numbers and the Securities and
      Exchange Commission file numbers indicated in parentheses.

  b.  During 1981, New Bedford Gas and Edison Light Company sold its gas
      business and properties to Commonwealth Gas Company and changed its
      corporate name to Commonwealth Electric Company.

  c.  The following is a glossary of Commonwealth Energy System and subsid-
      iary companies' acronyms that are used throughout the following Exhibit
      Index:

        CES ......................  Commonwealth Energy System
        CE .......................  Commonwealth Electric Company
        CEL ......................  Cambridge Electric Light Company
        CEC ......................  Canal Electric Company
        CG .......................  Commonwealth Gas Company
        NBGEL ....................  New Bedford Gas and Edison Light
                                    Company
        HOPCO ....................  Hopkinton LNG Corp.

                                 Exhibit Index

Exhibit 3. Declaration of Trust

                    Commonwealth Energy System (Registrant)

  3.1.1   Declaration of Trust of CES dated December 31, 1926, as amended by
          vote of the shareholders and trustees May 4, 1995 (Exhibit 1 to the
          CES Form 10-Q (September 1995), File No. 1-7316).

Exhibit 4.  Instruments defining the rights of security holders, including
            indentures

                    Commonwealth Energy System (Registrant)

Debt Securities -

  4.1.1   CES Note Agreement ($40 Million Privately Placed Senior Notes)
          dated June 28, 1989 (Exhibit 1 to the CES Form 10-Q (September
          1989), File No. 1-7316).

                       Cambridge Electric Light Company

Indenture of Trust or Supplemental Indenture of Trust -

  4.2.1   Original Indenture on Form S-1 (April, 1949) (Exhibit 7(a), File
          No. 2-7909).

  4.2.2   Third Supplemental on Form 10-K (1984) (Exhibit 1, File No. 2-
          7909).
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              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

  4.2.3   Fourth Supplemental on Form 10-K (1984) (Exhibit 2, File No. 2-
          7909).

  4.2.4   Sixth Supplemental on Form 10-Q (June 1989) (Exhibit 1, File No. 2-
          7909).

                    Subsidiary Companies of the Registrant

  4.2.5  Seventh Supplemental on Form 10-Q (June 1992), (Exhibit 1, File No
         2-7909).

                            Canal Electric Company

Indenture of Trust and First Mortgage or Supplemental Indenture of Trust and
First Mortgage -

  4.3.1  Indenture of Trust and First Mortgage with State Street Bank and
         Trust Company, Trustee, dated October 1, 1968 (Exhibit 4(b) to Form
         S-1, File No. 2-30057).

  4.3.2  First and General Mortgage Indenture with Citibank, N.A., Trustee,
         dated September 1, 1976 (Exhibit 4(b)2 to Form S-1, File No. 2-
         56915).

  4.3.3  First Supplemental dated October 1, 1968 with State Street Bank and
         Trust Company, Trustee, dated September 1, 1976 (Exhibit 4(b)3 to
         Form S-1, File No. 2-56915).

  4.3.4  Third Supplemental dated September 1, 1976 with Citibank, N.A., New
         York, NY, Trustee, dated December 1, 1990 (Exhibit 3 to 1990 Form
         10-K, File No. 2-30057).

  4.3.5  Fourth Supplemental dated September 1, 1976 with Citibank, N.A., New
         York, NY, Trustee, dated December 1, 1990 (Exhibit 4 to 1990 Form
         10-K, File No. 2-30057).

                           Commonwealth Gas Company

Indenture of Trust or Supplemental Indenture of Trust -

  4.4.1   Original Indenture on Form S-1 (Feb., 1949) (Exhibit 7(a), File No.
          2-7820).

  4.4.2   Sixteenth Supplemental on Form 10-K (1986) (Exhibit 1, File No. 2-
          1647).

  4.4.3   Seventeenth Supplemental on Form 10-K (1990) (Exhibit 2, File No.
          2-1647).

  4.4.4   Eighteenth Supplemental on Form 10-Q (March 1994) (Exhibit 1, File
          No. 2-1647).

  4.4.5   Nineteenth Supplemental on Form 10-K (1997) (Exhibit 1, File No. 2-
          1647).
<PAGE 58>


              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

Exhibit 10. Material Contracts

10.1      Power contracts.

10.1.1    Power contracts between CEC (Unit 1) and NBGEL and CEL dated
          December 1, 1965 (Exhibit 13(a)(1-4) to the CEC Form S-1, File No.
          2-30057).

10.1.2    Power contract between Yankee Atomic Electric Company (YAEC) and
          CEL dated June 30, 1959, as amended April 1, 1975 (Refiled as
          Exhibit 1 to the 1991 CEL Form 10-K, File No. 2-7909).

10.1.2.1 Second, Third and Fourth Amendments to 10.1.2 as amended October 1,
         1980, April 1, 1985 and May 6, 1988, respectively (Exhibit 2 to the
         CEL Form 10-Q (June 1988), File No. 2-7909).

10.1.2.2 Fifth and Sixth Amendments to 10.1.2 as amended June 26, 1989 and
         July 1, 1989, respectively (Exhibit 1 to the CEL Form 10-Q (Septem-
         ber 1989), File No. 2-7909).

10.1.3   Power Contract between YAEC and NBGEL dated June 30, 1959, as
         amended April 1, 1975 (Refiled as Exhibit 2 to the 1991 CE Form
         10-K, File No. 2-7749).

10.1.3.1 Second, Third and Fourth Amendments to 10.1.3 as amended October 1,
         1980, April 1, 1985 and May 6, 1988, respectively (Exhibit 1 to the
         CE Form 10-Q (June 1988), File No. 2-7749).

10.1.3.2 Fifth and Sixth Amendments to 10.1.3 as amended June 26, 1989 and
         July 1, 1989, respectively (Exhibit 3 to the CE Form 10-Q (September
         1989), File No. 2-7749).

10.1.4   Power Contract between Connecticut Yankee Atomic Power Company
         (CYAPC) and CEL dated July 1, 1964 (Exhibit 13-K1 to the System's
         Form S-1, (April 1967) File No. 2-25597).

10.1.4.1 Additional Power Contract providing for extension on contract term
         between CYAPC and CEL dated April 30, 1984 (Exhibit 5 to the CEL
         Form 10-Q (June 1984), File No. 2-7909).

10.1.4.2 Second Supplementary Power Contract providing for decommissioning
         financing between CYAPC and CEL dated April 30, 1984 (Exhibit 6 to
         the CEL Form 10-Q (June 1984), File No. 2-7909).

10.1.5   Power contract between Vermont Yankee Nuclear Power Corporation
         (VYNPC) and CEL dated February 1, 1968 (Exhibit 3 to the CEL 1984
         Form 10-K, File No. 2-7909).

10.1.5.1 First Amendment dated June 1, 1972 (Section 7) and Second Amendment
         dated April 15, 1983 (decommissioning financing) to 10.1.5 (Exhibits
         1 and 2, respectively, to the CEL Form 10-Q (June 1984), File No. 2-
         7909).
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              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

10.1.5.2 Third Amendment dated April 1, 1985 and Fourth Amendment dated June
         1, 1985 to 10.1.5 (Exhibits 1 and 2, respectively, to the CEL Form
         10-Q (June 1986), File No. 2-7909).

10.1.5.3 Fifth and Sixth Amendments to 10.1.5 dated February 1, 1968, both as
         amended May 6, 1988 (Exhibit 1 to the CEL Form 10-Q (June 1988),
         File No. 2-7909).

10.1.5.4 Seventh Amendment to 10.1.5 dated February 1, 1968, as amended June
         15, 1989 (Exhibit 2 to the CEL Form 10-Q (September 1989), File No.
         2-7909).

10.1.5.5 Additional Power Contract dated February 1, 1984 between CEL and
         VYNPC providing for decommissioning financing and contract extension
         (Refiled as Exhibit 1 to CEL 1993 Form 10-K, File No. 2-7909).

10.1.6   Power contract between Maine Yankee Atomic Power Company (MYAPC) and
         CEL dated May 20, 1968 (Exhibit 5 to the System's Form S-7, File No.
         2-38372).

10.1.6.1 First Amendment dated March 1, 1984 (decommissioning financing) and
         Second Amendment dated January 1, 1984 (supplementary payments) to
         10.1.6 (Exhibits 3 and 4 to the CEL Form 10-Q (June 1984), File No.
         2-7909).

10.1.6.2 Third Amendment to 10.1.6 dated October 1, 1984 (Exhibit 1 to the
         CEL Form 10-Q (September 1984), File No. 2-7909).

10.1.7   Agreement between NBGEL and Boston Edison Company (BECO) for the
         purchase of electricity from BECO's Pilgrim Unit No. 1 dated Au-
         gust 1, 1972 (Exhibit 7 to the CE 1984 Form 10-K, File No. 2-7749).

10.1.7.1 Service Agreement between NBGEL and BECO for purchase of stand-by
         power for BECO's Pilgrim Station dated August 16, 1978 (Exhibit 1 to
         the CE 1988 Form 10-K, File No. 2-7749).

10.1.7.2 System Power Sales Agreement by and between CE and BECO dated July
         12, 1984 (Exhibit 1 to the CE Form 10-Q (September 1984), File No.
         2-7749).

10.1.7.3 Power Exchange Agreement by and between BECO and CE dated December
         1, 1984 (Exhibit 16 to  the CE 1984 Form 10-K, File No. 2-7749).

10.1.7.4 Service Agreement for Non-Firm Transmission Service between BECO and
         CEL dated July 5, 1984 (Exhibit 4 to the CEL 1984 Form 10-K, File
         No. 2-7909).

10.1.8   Agreement for Joint-Ownership, Construction and Operation of New
         Hampshire Nuclear Units (Seabrook) dated May 1, 1973 (Exhibit 13(N)
         to the NBGEL Form S-1 dated October 1973, File No. 2-49013 and as
         amended below:

10.1.8.1 First through Fifth Amendments to 10.1.8 as amended May 24, 1974,
         June 21, 1974, September 25, 1974, October 25, 1974 and January 31,
         1975, respectively (Exhibit 13(m) to the NBGEL Form S-1 (November 7,
         1975), File No. 2-54995).

10.1.8.2 Sixth through Eleventh Amendments to 10.1.8 as amended April 18,
         1979, April 25, 1979, June 8, 1979, October 11, 1979 and December
         15, 1979, respectively (Refiled as Exhibit 1 to the CEC 1989 Form
         10-K, File No. 2-30057).
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              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

10.1.8.3  Twelfth through Fourteenth Amendments to 10.1.8 as amended May 16,
          1980, December 31, 1980 and June 1, 1982, respectively (Filed as
          Exhibits 1, 2, and 3 to the CE 1992 Form 10-K, File No. 2-7749).

10.1.8.4  Fifteenth and Sixteenth Amendments to 10.1.8 as amended April 27,
          1984 and June 15, 1984, respectively (Exhibit 1 to the CEC Form 10-
          Q (June 1984), File No. 2-30057).

10.1.8.5  Seventeenth Amendment to 10.1.8 as amended March 8, 1985 (Exhibit 1
          to the CEC Form 10-Q (March 1985), File No. 2-30057).

10.1.8.6  Eighteenth Amendment to 10.1.8 as amended March 14, 1986 (Exhibit 1
          to the CEC Form 10-Q (March 1986), File No. 2-30057).

10.1.8.7  Nineteenth Amendment to 10.1.8 as amended May 1, 1986 (Exhibit 1 to
          the CEC Form 10-Q (June 1986), File No. 2-30057).

10.1.8.8  Twentieth Amendment to 10.1.8 as amended September 19, 1986 (Exhib-
          it 1 to the CEC 1986 Form 10-K, File No. 2-30057).

10.1.8.9  Twenty-First Amendment to 10.1.8 as amended November 12, 1987
          (Exhibit 1 to the CEC 1987 Form 10-K, File No. 2-30057).

10.1.8.10 Settlement Agreement and Twenty-Second Amendment to 10.1.8, both
          dated January 13, 1989 (Exhibit 4 to the CEC 1988 Form 10-K, File
          No. 2-30057).

10.1.9    Purchase and Sale Agreement together with an implementing Addendum
          dated December 31, 1981, between CE and CEC, for the purchase and
          sale of the CE 3.52% joint-ownership interest in the Seabrook
          units, dated January 2, 1981 (Refiled as Exhibit 4 to the CE 1992
          Form 10-K, File No. 2-7749).

10.1.10   Agreement to transfer ownership, construction and operational
          interest in the Seabrook Units 1 and 2 from CE to CEC dated January
          2, 1981 (Refiled as Exhibit 3 to the 1991 CE Form 10-K, File No. 2-
          7749).

10.1.11   Power Contract, as amended to February 28, 1990, superseding the
          Power Contract dated September 1, 1986 and amendment dated June 1,
          1988, between CEC (seller) and CE and CEL (purchasers) for seller's
          entire share of the Net Unit Capability of Seabrook 1 and related
          energy (Exhibit 1 to the CEC Form 10-Q (March 1990), File No. 2-
          30057).

10.1.12   Agreement between NBGEL and Central Maine Power Company (CMP), for
          the joint-ownership, construction and operation of William F. Wyman
          Unit No. 4 dated November 1, 1974 together with Amendment No. 1
          dated June 30, 1975 (Exhibit 13(N) to the NBGEL Form S-1, File No.
          2-54955).




<PAGE 61>


              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

10.1.12.1 Amendments No. 2 and 3 to 10.1.12 as amended August 16, 1976 and
          December 31, 1978 (Exhibit 5(a) 14 to the System's Form S-16 (June
          1979), File No. 2-64731).

10.1.13   Agreement between the registrant and Montaup Electric Company (MEC)
          for use of common facilities at Canal Units I and II and for
          allocation of related costs, executed October 14, 1975 (Exhibit 1
          to the CEC 1985 Form 10-K, File No. 2-30057).

10.1.13.1 Agreement between the registrant and MEC for joint-ownership of
          Canal Unit II, executed October 14, 1975 (Exhibit 2 to the CEC 1985
          Form 10-K, File No. 2-30057).

10.1.13.2 Agreement between the registrant and MEC for lease relating to
          Canal Unit II, executed October 14, 1975 (Exhibit 3 to the CEC 1985
          Form 10-K, File No. 2-30057).

10.1.14   Contract between CEC and NBGEL and CEL, affiliated companies, for
          the sale of specified amounts of electricity from Canal Unit 2
          dated January 12, 1976 (Exhibit 7 to the System's 1985 Form 10-K,
          File No. 1-7316).

10.1.15   Capacity Acquisition Agreement between CEC,CEL and CE dated Septem-
          ber 25, 1980 (Refiled as Exhibit 1 to the 1991 CEC Form 10-K, File
          No. 2-30057).

10.1.15.1 Amendment to 10.1.15 as amended and restated June 1, 1993,  hence-
          forth referred to as the Capacity Acquisition and Disposition
          Agreement, whereby Canal Electric Company, as agent, in addition to
          acquiring power may also sell bulk electric power which Cambridge
          Electric Light Company and/or Commonwealth Electric Company owns or
          otherwise has the right to sell (Exhibit 1 to Canal Electric's Form
          10-Q (September 1993), File No. 2-30057).

10.1.16   Phase 1 Vermont Transmission Line Support Agreement and Amendment
          No. 1 thereto between Vermont Electric Transmission Company, Inc.
          and certain other New England utilities, dated December 1, 1981 and
          June 1, 1982, respectively (Exhibits 5 and 6 to the CE 1992 Form
          10-K, File No. 2-7749).

10.1.16.1 Amendment No. 2 to 10.1.16 as amended November 1, 1982 (Exhibit 5
          to the CE Form 10-Q (June 1984), File No. 2-7749).

10.1.16.2 Amendment No. 3 to 10.1.16 as amended January 1, 1986 (Exhibit 2 to
          the CE 1986 Form 10-K, File No. 2-7749).

10.1.17   Power Purchase Agreement between Pioneer Hydropower, Inc. and CE
          for the purchase of available hydro-electric energy produced by a
          facility located in Ware, Massachusetts, dated September 1, 1983
          (Refiled as Exhibit 1 to the CE 1993 Form 10-K, File No. 2-7749).




<PAGE 62>


              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

10.1.18   Power Purchase Agreement between Corporation Investments, Inc.
          (CI), and CE for the purchase of available hydro-electric energy
          produced by a facility located in Lowell, Massachusetts, dated
          January 10, 1983 (Refiled as Exhibit 2 to the CE 1993 Form 10-K,
          File No. 2-7749).

10.1.18.1 Amendment to 10.1.18 between CI and Boott Hydropower, Inc., an
          assignee therefrom, and CE, as amended March 6, 1985 (Exhibit 8 to
          the CE 1984 Form 10-K, File No. 2-7749).

10.1.19   Phase 1 Terminal Facility Support Agreement dated December 1, 1981,
          Amendment No. 1 dated June 1, 1982 and Amendment No. 2 dated
          November 1, 1982, between New England Electric Transmission Corpo-
          ration (NEET), other New England utilities and CE (Exhibit 1 to the
          CE Form 10-Q (June 1984), File No. 2-7749).

10.1.19.1 Amendment No. 3 to 10.1.19 (Exhibit 2 to the CE Form 10-Q (June
          1986), File No. 2-7749).

10.1.20   Preliminary Quebec Interconnection Support Agreement dated May 1,
          1981, Amendment No. 1 dated September 1, 1981, Amendment No. 2
          dated June 1, 1982, Amendment No. 3 dated November 1, 1982, Amend-
          ment No. 4 dated March 1, 1983 and Amendment No. 5 dated June 1,
          1983 among certain New England Power Pool (NEPOOL) utilities
          (Exhibit 2 to the CE Form 10-Q (June 1984), File No. 2-7749).

10.1.21   Agreement with Respect to Use of Quebec Interconnection dated
          December 1, 1981, Amendment No. 1 dated May 1, 1982 and Amendment
          No. 2 dated November 1, 1982 among certain NEPOOL utilities (Exhib-
          it 3 to the CE Form 10-Q (June 1984), File No. 2-7749).

10.1.21.1 Amendatory Agreement No. 3 to 10.1.21 as amended June 1, 1990,
          among certain NEPOOL utilities (Exhibit 1 to the CEC Form 10-Q
          (September 1990), File No. 2-30057).

10.1.22   Phase I New Hampshire Transmission Line Support Agreement between
          NEET and certain other New England Utilities dated December 1, 1981
          (Exhibit 4 to the CE Form 10-Q (June 1984), File No. 2-7749).

10.1.23   Agreement, dated September 1, 1985, with Respect To Amendment of
          Agreement With Respect To Use Of Quebec Interconnection, dated
          December 1, 1981, among certain NEPOOL utilities to include Phase
          II facilities in the definition of "Project" (Exhibit 1 to the CEC
          Form 10-Q (September 1985), File No. 2-30057).

10.1.24   Agreement to Preliminary Quebec Interconnection Support Agreement -
          Phase II among Public Service Company of New Hampshire (PSNH), New
          England Power Co. (NEP), BECO and CEC whereby PSNH assigns a
          portion of its interests under the original Agreement to the other
          three parties, dated October 1, 1987 (Exhibit 2 to the CEC 1987
          Form 10-K, File No. 2-30057).



<PAGE 63>


              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

10.1.25   Preliminary Quebec Interconnection Support Agreement - Phase II
          among certain New England electric utilities dated June 1, 1984
          (Exhibit 6 to the CE Form 10-Q (June 1984), File No. 2-7749).

10.1.25.1 First, Second and Third Amendments to 10.1.25 as amended March 1,
          1985, January 1, 1986 and March 1, 1987, respectively (Exhibit 1 to
          the CEC Form 10-Q (March 1987), File No. 2-30057).

10.1.25.2 Fifth, Sixth and Seventh Amendments to 10.1.25 as amended October
          15, 1987, December 15, 1987 and March 1, 1988, respectively (Exhib-
          it 1 to the CEC Form 10-Q (June 1988), File No. 2-30057).

10.1.25.3 Fourth and Eighth Amendments to 10.1.25 as amended July 1, 1987 and
          August 1, 1988, respectively (Exhibit 3 to the CEC Form 10-Q
          (September 1988), File No. 2-30057).

10.1.25.4 Ninth and Tenth Amendments to 10.1.25 as amended November 1, 1988
          and January 15, 1989, respectively (Exhibit 2 to the CEC 1988 Form
          10-K, File No. 2-30057).

10.1.25.5 Eleventh Amendment to 10.1.25 as amended November 1, 1989 (Exhibit
          4 to the CEC 1989 Form 10-K, File No. 2-30057).

10.1.25.6 Twelfth Amendment to 10.1.25 as amended April 1, 1990 (Exhibit 1 to
          the CEC Form 10-Q (June 1990), File No. 2-30057).

10.1.26   Phase II Equity Funding Agreement for New England Hydro-Transmis-
          sion Electric Company, Inc. (New England Hydro) (Massachusetts),
          dated June 1, 1985, between New England Hydro and certain NEPOOL
          utilities (Exhibit 2 to the CEC Form 10-Q (September 1985), File
          No. 2-30057).

10.1.27   Phase II Massachusetts Transmission Facilities Support Agreement
          dated June 1, 1985, refiled as a single agreement incorporating
          Amendments 1 through 7 dated May 1, 1986 through January 1, 1989,
          respectively, between New England Hydro and certain NEPOOL utili-
          ties (Exhibit 2 to the CEC Form 10-Q (September 1990), File No. 2-
          30057).

10.1.28   Phase II New Hampshire Transmission Facilities Support Agreement
          dated June 1, 1985, refiled as a single agreement incorporating
          Amendments 1 through 8 dated May 1, 1986 through January 1, 1990,
          respectively, between New England Hydro-Transmission Corporation
          (New Hampshire Hydro) and certain NEPOOL utilities (Exhibit 3 to
          the CEC Form 10-Q (September 1990), File No. 2-30057).

10.1.29   Phase II Equity Funding Agreement for New Hampshire Hydro, dated
          June 1, 1985, between New Hampshire Hydro and certain NEPOOL
          utilities (Exhibit 3 to the CEC Form 10-Q (September 1985), File
          No. 2-30057).

10.1.29.1 Amendment No. 1 to 10.1.29 dated May 1, 1986 (Exhibit 6 to the CEC
          Form 10-Q (March 1987), File No. 2-30057).

<PAGE 64>


              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

10.1.29.2 Amendment No. 2 to 10.1.29 as amended September 1, 1987 (Exhibit 3
          to the CEC Form 10-Q (September 1987), File No. 2-30057).

10.1.30   Phase II New England Power AC Facilities Support Agreement, dated
          June 1, 1985, between NEP and certain NEPOOL utilities (Exhibit 6
          to the CEC Form 10-Q (September 1985), File No. 2-30057).

10.1.30.1 Amendments Nos. 1 and 2 to 10.1.30 as amended May 1, 1986 and
          February 1, 1987, respectively (Exhibit 5 to the CEC Form 10-Q
          (March 1987), File No. 2-30057).

10.1.30.2 Amendments Nos. 3 and 4 to 10.1.30 as amended June 1, 1987 and
          September 1, 1987, respectively (Exhibit 5 to the CEC Form 10-Q
          (September 1987), File No. 2-30057).

10.1.31   Agreement Authorizing Execution of Phase II Firm Energy Contract,
          dated September 1, 1985, among certain NEPOOL utilities in regard
          to participation in the purchase of power from Hydro-Quebec (Exhib-
          it 8 to the CEC Form 10-Q (September 1985), File No. 2-30057).

10.1.32   Agreements by and between Swift River Company and CE for the
          purchase of available hydro-electric energy to be produced by units
          located in Chicopee and North Willbraham, Massachusetts, both dated
          September 1, 1983 (Exhibits 11 and 12 to the CE 1984 Form 10-K,
          File No. 2-7749).

10.1.33   Power Purchase Agreement by and between SEMASS Partnership, as
          seller, to construct, operate and own a solid waste disposal
          facility at its site in Rochester, Massachusetts and CE, as buyer
          of electric energy and capacity, dated September 8, 1981 (Exhibit
          17 to the CE 1984 Form 10-K, File No. 2-7749).

10.1.33.1 Power Sales Agreement to 10.1.33 for all capacity and related
          energy produced, dated October 31, 1985 (Exhibit 2 to the CE 1985
          Form 10-K, File No. 2-7749).

10.1.33.2 Amendment to 10.1.33 for all additional electric capacity and
          related energy to be produced by an addition to the Original Unit,
          dated March 14, 1990 (Exhibit 1 to the CE Form 10-Q (June 1990),
          File No. 2-7749).

10.1.33.3 Amendment to 10.1.33 for all additional electric capacity and
          related energy to be produced by an addition to the Original Unit,
          dated May 24, 1991 (Exhibit 1 to CE Form 10-Q (June 1991), File No.
          2-7749).

10.1.34   Power Sale Agreement by and between CE (buyer) and Northeast Energy
          Associated, Ltd. (NEA) (seller) of electric energy and capacity,
          dated November 26, 1986 (Exhibit 1 to the CE Form 10-Q (March
          1987), File No. 2-7749).

10.1.34.1 First Amendment to 10.1.34 as amended August 15, 1988 (Exhibit 1 to
          the CE Form 10-Q (September 1988), File No. 2-7749).

<PAGE 65>


              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

10.1.34.2 Second Amendment to 10.1.34 as amended January 1, 1989 (Exhibit 2
          to the CE 1988 Form 10-K, File No. 2-7749).

10.1.34.3 Power Sale Agreement dated August 15, 1988 between NEA and CE for
          the purchase of 21 MW of electricity (Exhibit 2 to the CE Form
          10-Q (September 1988), File No. 2-7749).

10.1.34.4 Amendment to 10.1.34.3 as amended January 1, 1989 (Exhibit 3 to the
          CE 1988 Form 10-K, File No. 2-7749).

10.1.35   Power Purchase Agreement and First Amendment, dated September 5,
          1989 and August 3, 1990, respectively, by and between Commonwealth
          Electric (buyer) and Dartmouth Power Associates Limited Partnership
          (seller), whereby buyer will purchase all of the energy (67.6 MW)
          produced by a single gas turbine unit (Exhibit 1 to the CE Form 10-
          Q (June 1992), File No. 2-7749).

10.1.35.1 Second Amendment, dated June 23, 1994, to 10.1.50 by and between
          Commonwealth Electric Company and Dartmouth Power Associates, L.P.
          dated September 5, 1989 (Exhibit 4 to the CE Form 10-Q (June 1995),
          File No. 2-7749).

10.1.36   Power Purchase Agreement by and between Masspower (seller) and Com-
          monwealth Electric Company (buyer) for a 11.11% entitlement to the
          electric capacity and related energy of a 240 MW gas-fired cogen-
          eration facility, dated February 14, 1992 (Exhibit 1 to Common-
          wealth Electric's Form 10-Q (September 1993), File No. 2-7749).

10.1.37   Power Sale Agreement by and between Altresco Pittsfield, L.P.
          (seller) and Commonwealth Electric Company (buyer) for a 17.2%
          entitlement to the electric capacity and related energy of a 160 MW
          gas-fired cogeneration facility, dated February 20, 1992 (Exhibit 2
          to Commonwealth Electric's Form 10-Q (September 1993), File No. 2-
          7749).

10.1.37.1 System Exchange Agreement by and among Altresco Pittsfield, L.P.,
          Cambridge Electric Light Company, Commonwealth Electric Company and
          New England Power Company, dated July 2, 1993 (Exhibit 3 to Common-
          wealth Electric's Form 10-Q (September 1993), File No 2-7749).

10.1.37.2 Power Sale Agreement by and between Altresco Pittsfield, L. P.
          (seller) and Cambridge Electric Light Company (Cambridge Electric)
          (buyer) for a 17.2% entitlement to the electric capacity and
          related energy of a 160 MW gas-fired cogeneration facility, dated
          February 20, 1992 (Exhibit 1 to Cambridge Electric's Form 10-Q
          (September 1993), File No. 2-7909).

10.1.37.3 First Amendment, dated November 7, 1994, to 10.1.37 by and between
          Commonwealth Electric Company and Altresco Pittsfield, L.P. dated
          February 20, 1992 (Filed as Exhibit 3 to Commonwealth Electric
          Company's Form 10-Q (June 1995), File 2-7749).



<PAGE 66>


              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

10.1.37.4 First Amendment, dated November 7, 1994, to 10.1.37.2 by and
          between Cambridge Electric Light Company and Altresco Pittsfield,
          L.P. dated February 20, 1992 (Filed as Exhibit 2 to Cambridge
          Electric Light Company's Form 10-Q (June 1995), File 2-7909).

10.2      Natural gas purchase contracts.

10.2.1    Transportation Agreement between CNG and CG to provide for trans-
          portation of natural gas on a daily basis from Steuben Gas Storage
          Company to TGP (Exhibit 10 to the CG 1991 Form 10-K, File No. 2-
          1647).

10.3      Other agreements.

10.3.1    Pension Plan for Employees of Commonwealth Energy System and
          Subsidiary Companies as amended and restated January 1, 1993
          (Exhibit 1 to CES Form 10-Q (September 1993), File No. 1-7316).

10.3.2    Employees Savings Plan of Commonwealth Energy System and Subsid-
          iary Companies as amended and restated January 1, 1993.(Exhibit 2
          to CES Form 10-Q (September 1993), File No. 1-7316).

10.3.2.1  First Amendment to 10.3.2, effective October 1, 1994. (Exhibit 1 to
          CES Form S-8 (January 1995), File No. 1-7316).

10.3.2.2  Second Amendment to 10.3.2, effective April 1, 1996 (Exhibit 1 to
          CES Form 10-K/A Amendment No. 1 (April 30, 1996), File No. 1-7316).

10.3.2.3  Third Amendment to 10.3.2, effective January 1, 1997 (Exhibit 1 to
          CES Form 10-K/A Amendment No. 1 (April 29, 1997), File No. 1-7316).

10.3.3    New England Power Pool Agreement (NEPOOL) dated September 1, 1971
          as amended through August 1, 1977, between NEGEA Service Corpora-
          tion, as agent for CEL, CEC, NBGEL, and various other electric
          utilities operating in New England together with amendments dated
          August 15, 1978, January 31, 1979 and February 1, 1980. (Exhibit
          5(c)13 to New England Gas and Electric Association's Form S-16
          (April 1980), File No. 2-64731).

10.3.3.1  Thirteenth Amendment to 10.3.3 as amended September 1, 1981 (Re-
          filed as Exhibit 3 to the System's 1991 Form 10-K, File No.
          1-7316).

10.3.3.2  Fourteenth through Twentieth Amendments to 10.3.3 as amended
          December 1, 1981, June 1, 1982, June 15, 1983, October 1, 1983,
          August 1, 1985, August 15, 1985 and September 1, 1985, respectively
          (Exhibit 4 to the CES Form 10-Q (September 1985), File No. 1-7316).

10.3.3.3  Twenty-first Amendment to 10.3.3 as amended to January 1, 1986
          (Exhibit 1 to the CES Form 10-Q (March 1986), File No. 1-7316).

10.3.3.4  Twenty-second Amendment to 10.3.3 as amended to September 1, 1986
          (Exhibit 1 to the CES Form 10-Q (September 1986), File No. 1-7316).

<PAGE 67>


              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

10.3.3.5  Twenty-third Amendment to 10.3.3 as amended to April 30, 1987
          (Exhibit 1 to the CES Form 10-Q (June 1987), File No. 1-7316).

10.3.3.6  Twenty-fourth Amendment to 10.3.3 as amended March 1, 1988 (Exhibit
          1 to the CES Form 10-Q (March 1989), File No. 1-7316).

10.3.3.7  Twenty-fifth Amendment to 10.3.3. as amended to May 1, 1988 (Exhib-
          it 1 to the CES Form 10-Q (March 1988), File No. 1-7316).

10.3.3.8  Twenty-sixth Agreement to 10.3.3 as amended March 15, 1989 (Exhibit
          1 to the CES Form 10-Q (March 1989), File No. 1-7316).

10.3.3.9  Twenty-seventh Agreement to 10.3.3 as amended October 1, 1990
          (Exhibit 3 to the CES 1990 Form 10-K, File No. 1-7316).

10.3.3.10 Twenty-eighth Agreement to 10.3.3 as amended September 15, 1992
          (Exhibit 1 to the CES Form 10-Q (September 1994), File No. 1-7316).

10.3.3.11 Twenty-ninth Agreement to 10.3.3 as amended May 1, 1993 (Exhibit 2
          to the CES Form 10-Q (September 1994), File No. 1-7316).

10.3.4    Guarantee Agreement by CEL (as guarantor) and MYA Fuel Company (as
          initial lender) covering the unconditional guarantee of a portion
          of the payment obligations of Maine Yankee Atomic Power Company
          under a loan agreement and note initially between Maine Yankee and
          MYA Fuel Company (Exhibit 3 to the CEL Form 10-K for 1985, File No.
          2-7909). 

Exhibit 21. Subsidiaries of the Registrant

            Filed herewith as Exhibit 1 is a list of subsidiaries of Common-
            wealth Energy System, all of which are wholly-owned, as of Decem-
            ber 31, 1997.

Exhibit 22. Published Report Regarding Matters Submitted to Vote of Security
            Holders.

            Filed herewith as Exhibit 2 is the Notice of 1998 Annual Meeting
            and Proxy Statement dated March 30, 1998.

Exhibit 27. Financial Data Schedule

            Filed herewith as Exhibit 3 is the Financial Data Schedule for
            the twelve months ended December 31, 1997.

(b) Reports on Form 8-K

            No reports on Form 8-K were filed during the three months ended
            December 31, 1997.
<PAGE 68>


                   REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS



To the Board of Trustees of Commonwealth Energy System:


    We have audited, in accordance with generally accepted auditing standards,
the consolidated financial statements of Commonwealth Energy System included
in this Form 10-K and have issued our report thereon dated February 19, 1998
(except with respect to certain matters discussed in Note 2, as to which the
date is March 2, 1998).  Our audits were made for the purpose of forming an
opinion on those consolidated financial statements taken as a whole.  The
schedules listed in Part IV, Item 14 of this Form 10-K are presented for
purposes of complying with the Securities and Exchange Commission's rules and
are not part of the basic consolidated financial statements.  These schedules
have been subjected to the auditing procedures applied in the audits of the
basic consolidated financial statements and, in our opinion, fairly state in
all material respects the financial data required to be set forth therein in
relation to the basic consolidated financial statements taken as a whole.


                                          ARTHUR ANDERSEN LLP

Boston, Massachusetts
February 19, 1998.

<PAGE 69>

<TABLE>                                                                                                     SCHEDULE I
                                      COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES
                      INVESTMENTS IN, EQUITY IN EARNINGS OF, AND DIVIDENDS RECEIVED FROM RELATED PARTIES
                                             FOR THE YEAR ENDED DECEMBER 31, 1997
                                                    (Dollars in Thousands)
<CAPTION>                              Balance at                                                  Balance at
                                   Beginning of Year        Additions        Deductions            End of Year      Notes
                                   Number                 Equity                                Number             Receive-
                                     of                     in    Other  Distribution Other      of                  able
<S>                                Shares   Investment   Earnings  (A)   of Earnings   (B)      Shares  Investment    (C)    
SUBSIDIARIES CONSOLIDATED:       <C>        <C>         <C>      <C>     <C>          <C>      <C>      <C>        <C>
 (All issues are common stock)
   Cambridge Electric Light Co.     346,600   $ 45,851   $ 5,216  $  -    $ 2,842     $ -      346,600   $ 48,225  $  7,500
   COM/Energy Steam Co.              25,500      3,194     1,265     -        951       -       25,500      3,508       375
   Canal Electric Co.             1,523,200     99,021    14,828     -     14,318       -    1,523,200     99,531       - 
   Commonwealth Gas Co.           2,857,000    110,020    15,443     -      9,428       -    2,857,000    116,035       - 
   Darvel Realty Trust                   26      1,001        52     -        -         -           26      1,053       - 
   COM/Energy Freetown Rlty.              1      5,031      (347)    -        -         -            1      4,684     1,730
   COM/Energy Research Park Rlty.         1        877       582     -        528       -            1        931       - 
   COM/Energy Cambridge Rlty.             1         43        (5)    -        -         -            1         38       - 
   COM/Energy Acushnet Rlty.              1        694        62     -         55       -            1        701       - 
   COM/Energy Services Co.            3,250        262        22     -        -         -        3,250        284       - 
   Commonwealth Electric Co.      2,043,972    175,545    16,923     -     12,264       -    2,043,972    180,204       -  
   Hopkinton LNG Corp.                5,000      3,881       549     -        548       -        5,000      3,882       650
   Advanced Energy Systems, Inc.        -          -        (904)  1,921      -         -          100      1,017       -
   COM/Energy Resources, Inc.           -          -         (60)    101      -         -          100         41       -
   COM/Energy Marketing, Inc.           -          -        (758)  1,200      -         -          100        442       -
   COM/Energy Technologies, Inc.        -          -        (916)  3,300      -         -          100      2,384       -  
                                              $445,420   $51,952  $6,522  $40,934     $ -                $462,960   $ 9,795
OTHER INVESTMENTS:
 (Accounted for by the equity method)
   Nuclear Electric Power Companies  52,454    $10,046   $ 1,045     -    $   723     $ -       52,454   $ 10,368
   Hydro-Quebec Phase II            137,329      3,321       233     -        248      231     127,034      3,075
   Other Investments                    -           28       -       296      -         -          -          324
<FN>                                          $ 13,395   $ 1,278     296  $   971     $231               $ 13,767
NOTES:
       (A)  Additional investment.
       (B)  In 1997, New England Hydro-Transmission Company, Inc. repurchased 7.5% (10.249.2 shares) of its outstanding
            shares.  Canal Electric Company received proceeds of $145,539 ($14.20 per share) and has included this amount
            with dividends.  Also in 1997, New England Hydro-Transmission Corporation repurchased 6.85% (46.124 shares) of
            its outstanding shares.  Canal Electric Company received proceeds of $85,207 (41,847.46 per share) and has
            included this amount with dividends.
       (C)  Notes are written for 11 months and 29 days.  Interest is at the prime rate and is adjusted for changes in the
            rate during the term of the notes.
</TABLE>
<PAGE 70>
<TABLE>
                                                                                                             SCHEDULE I
                                      COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES
                      INVESTMENTS IN, EQUITY IN EARNINGS OF, AND DIVIDENDS RECEIVED FROM RELATED PARTIES
                                             FOR THE YEAR ENDED DECEMBER 31, 1996
                                                    (Dollars in Thousands)
<CAPTION>
                                           Balance at                                           Balance at
                                       Beginning of Year    Additions      Deductions           End of Year    
                                       Number                 Equity                         Number                 Notes
                                         of                     in     Distribution Other     of                  Receivable
                                       Shares   Investment   Earnings  of Earnings   (B)     Shares   Investment      (A)   
<S>                                  <C>        <C>         <C>        <C>          <C>     <C>       <C>         <C>
SUBSIDIARIES CONSOLIDATED:
 (All issues are common stock)
   Cambridge Electric Light Company    346,600  $ 44,179     $ 5,120      $ 3,448     $ -     346,600  $ 45,851    $  4,665
   COM/Energy Steam Company             25,500     3,539       1,583        1,928       -      25,500     3,194       2,155
   Canal Electric Company            1,523,200    98,471      16,574       16,024       -   1,523,200    99,021       5,620
   Commonwealth Gas Company          2,857,000   109,659      16,789       16,428       -   2,857,000   110,020       5,495
   Darvel Realty Trust                      26     1,055          75          129       -          26     1,001         -
   COM/Energy Freetown Realty                1     5,477        (446)         -         -           1     5,031       1,305
   COM/Energy Research Park Realty           1       739         461          323       -           1       877         -
   COM/Energy Cambridge Realty               1        48          (5)         -         -           1        43         -
   COM/Energy Acushnet Realty                1       575         119          -         -           1       694         -
   COM/Energy Services Company           3,250       337         (27)          48       -       3,250       262         -
   Commonwealth Electric Company     2,043,972   168,919      19,605       12,979       -   2,043,972   175,545       2,240
   Hopkinton LNG Corp.                   5,000     3,893         548          560       -       5,000     3,881       1,015
                                                $436,891     $60,396      $51,867     $ -              $445,420     $22,495

OTHER INVESTMENTS:
 (Accounted for by the equity method)
   Nuclear Electric Power Companies     52,454  $  9,814     $ 1,059      $   827     $ -      52,454  $ 10,046
   Hydro-Quebec Phase II               137,391     3,372         498          436      113    137,329     3,321
   Other Investments                       -          28         -            -         -         -          28
                                                $ 13,214     $ 1,557      $ 1,263     $113             $ 13,395
<FN>
NOTES: (A)  Notes are written for 11 months and 29 days.  Interest is at the prime rate and is adjusted for changes in the
            rate during the term of the notes.
       (B)  In 1996, New England Hydro-Transmission Corporation repurchased 6.52% of their outstanding shares at $1,831.30
            per share.  Canal Electric Company received $112,616 for the repurchase of 61.495 shares, and has included this
            amount with dividends.
</TABLE>
<PAGE 71>
<TABLE>                                                                                                     SCHEDULE I
                                      COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES
                      INVESTMENTS IN, EQUITY IN EARNINGS OF, AND DIVIDENDS RECEIVED FROM RELATED PARTIES
                                             FOR THE YEAR ENDED DECEMBER 31, 1995
                                                    (Dollars in Thousands)
<CAPTION>
                                           Balance at                                           Balance at
                                       Beginning of Year    Additions      Deductions           End of Year    
                                       Number                 Equity                         Number                 Notes
                                         of                     in     Distribution Other     of                  Receivable
                                       Shares   Investment   Earnings  of Earnings   (B)     Shares   Investment      (A)   
<S>                                  <C>        <C>         <C>        <C>          <C>     <C>       <C>         <C>
SUBSIDIARIES CONSOLIDATED:
 (All issues are common stock)
   Cambridge Electric Light Company    346,600  $ 43,784     $ 5,438      $ 5,043     $-      346,600  $ 44,179    $ 2,425
   COM/Energy Steam Company             25,500     4,110       2,093        2,664      -       25,500     3,539        500
   Canal Electric Company            1,523,200    98,048      14,132       13,709      -    1,523,200    98,471        555
   Commonwealth Gas Company          2,857,000   106,001      16,229       12,571      -    2,857,000   109,659      1,425
   Darvel Realty Trust                      26       870         185          -        -           26     1,055        -
   COM/Energy Freetown Realty                1     5,833        (356)         -        -            1     5,477      1,085
   COM/Energy Research Park Realty           1       886         239          386      -            1       739        -
   COM/Energy Cambridge Realty               1        57          (9)         -        -            1        48        -
   COM/Energy Acushnet Realty                1       524          67           16      -            1       575        -
   COM/Energy Services Company           3,250       337          49           49      -        3,250       337        -
   Commonwealth Electric Company     2,043,972   163,561      15,169        9,811      -    2,043,972   168,919        -
   Hopkinton LNG Corp.                   5,000     3,893         548          548      -        5,000     3,893        -  
                                                $427,904     $53,784      $44,797     $-               $436,891     $6,610

OTHER INVESTMENTS:
 (Accounted for by the equity method)
   Nuclear Electric Power Companies     52,454  $  9,818     $ 1,093      $ 1,097     $-       52,454  $  9,814
   Hydro-Quebec Phase II               137,442     3,802         540          876      94     137,391     3,372
   Other Investments                       -          28         -            -        -          -          28
                                                $ 13,648     $ 1,633      $ 1,973     $94              $ 13,214
<FN>
NOTES:  (A) Notes are written for 11 months and 29 days.  Interest is at the prime rate and is adjusted for changes in the
            rate during the term of the notes.
        (B) In 1995, New England Hydro-Transmission Corporation repurchased 6.52% of their outstanding shares at $1,834.62
            per share.  Canal Electric Company received $94,017 for the repurchase of 51.246 shares, and has included this
            amount with dividends.
</TABLE>
<PAGE 72>

                                                               SCHEDULE II

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

                       VALUATION AND QUALIFYING ACCOUNTS

             FOR THE YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995

                            (Dollars in Thousands)


                                      Additions       
                   Balance at  Provision                 Deductions   Balance
                   Beginning   Charged to                 Accounts    at End
Description         of Year    Operations   Recoveries   Written Off  of Year


                                     Year Ended December 31, 1997   

Allowance for
  Doubtful Accounts  $8,324     $8,638        $2,085       $ 9,639    $9,408


                                     Year Ended December 31, 1996   

Allowance for
  Doubtful Accounts  $8,040     $7,152        $1,866       $ 8,734    $8,324


                                     Year Ended December 31, 1995   

Allowance for
  Doubtful Accounts  $7,956     $8,089        $2,180       $10,185    $8,040

<PAGE 73>


                          COMMONWEALTH ENERGY SYSTEM

                     FORM 10-K          DECEMBER 31, 1997

                                  SIGNATURES

     Pursuant to the requirements of Section 13 or 15(d) of the Securities
Exchange Act of 1934, the registrant has duly caused this report to be signed
on its behalf by the undersigned, thereunto duly authorized.

                                           COMMONWEALTH ENERGY SYSTEM   
                                                (Registrant)


                                  By:    WILLIAM G. POIST               
                                         William G. Poist, President and
                                         Chief Executive Officer

     Pursuant to the requirements of the Securities Exchange Act of 1934, this
report has been signed below by the following persons on behalf of the
registrant and in the capacities and on the date indicated.

Principal Executive Officer:

WILLIAM G. POIST                                   March 26, 1998
William G. Poist,
President and Chief Executive Officer

Principal Financial and Accounting Officer:

JAMES D. RAPPOLI                                   March 26, 1998
James D. Rappoli,
Financial Vice President and Treasurer

A majority of the Board of Trustees:

SHELDON A. BUCKLER                                 March 26, 1998
Sheldon A. Buckler, Chairman of
    the Board

KEVIN C. BRYANT                                    March 26, 1998
Kevin C. Bryant, Trustee

PETER H. CRESSY                                    March 26, 1998
Peter H. Cressy, Trustee

B. L. FRANCIS                                      March 26, 1998
Betty L. Francis, Trustee

FRANKLIN M. HUNDLEY                                March 26, 1998
Franklin M. Hundley, Trustee
<PAGE 74>


                          COMMONWEALTH ENERGY SYSTEM

                     FORM 10-K          DECEMBER 31, 1997

                                  SIGNATURES
                                  (Continued)


WILLIAM J. O'BRIEN                                 March 26, 1998
William J. O'Brien, Trustee

WILLIAM G. POIST                                   March 26, 1998
William G. Poist, Trustee

MICHAEL C. RUETTGERS                               March 26, 1998
Michael C. Ruettgers, Trustee

G. L. WILSON                                       March 26, 1998
Gerald L. Wilson, Trustee

<PAGE 75>



                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS




   As independent public accountants, we hereby consent to the incorporation
by reference of our reports included in this Form 10-K into the System's
previously filed Registration Statements on Form S-8 File No. 33-57467 and on
Form S-3 File No. 33-55593.  It should be noted that we have not audited any
financial statements of the System subsequent to December 31, 1997 or per-
formed any audit procedures subsequent to the date of our report.



                                             ARTHUR ANDERSEN LLP

Boston, Massachusetts
March 31, 1998.


                                                   Exhibit 1

                   COMMONWEALTH ENERGY SYSTEM

                      LIST OF SUBSIDIARIES

                        DECEMBER 31, 1997



Advanced Energy Systems, Inc.

Cambridge Electric Light Company

Canal Electric Company

COM/Energy Acushnet Realty

COM/Energy Cambridge Realty

COM/Energy Freetown Realty

COM/Energy Marketing, Inc.

COM/Energy Research Park Realty

COM/Energy Resources, Inc.

COM/Energy Services Company

COM/Energy Steam Company

COM/Energy Technologies, Inc.

Commonwealth Electric Company

Commonwealth Gas Company

Darvel Realty Trust

Hopkinton LNG Corp.


<PAGE 1>









                                                Commonwealth
                                                Energy System
                                                Notice of 1998
                                                Annual Meeting and
                                                Proxy Statement






































                                        Please sign and return your
                                        proxy promptly
<PAGE>
<PAGE 2>


                          COMMONWEALTH ENERGY SYSTEM

                           Cambridge, Massachusetts

                   Notice of Annual Meeting of Shareholders

                                  May 7, 1998

To the Shareholders of
COMMONWEALTH ENERGY SYSTEM:

      Notice is hereby given that the Annual Meeting of Shareholders of
Commonwealth Energy System will be held at the office of the System, One Main
Street, P.O. Box 9150, Cambridge, Massachusetts 02142-9150, on Thursday,
May 7, 1998, at 10:30 o'clock A.M., Eastern Daylight Time, for the following
purposes:

       1. To elect three Trustees to hold office for a three-year term and
          until the election and qualification of their respective successors.

       2. To take action on a proposal by the Board of Trustees to amend
          Section 22 of the System's Declaration of Trust, as         
          amended, to revise the conditions under which presently         
          authorized but unissued Common Shares of the System might         
          be issued.

       3. To approve the Restricted Common Share Plan for Trustees of
          Commonwealth Energy System.

       4. To consider and vote upon a shareholder proposal, if presented    
          at the meeting, as described herein.

       5. To transact such other business as may properly come before the
          meeting or any adjournment or adjournments thereof.

       Common Shareholders of record at the close of business on March 17,
1998 are entitled to notice of, and to vote at, the meeting.

                                          By order of the Trustees, 



                                          Michael P. Sullivan
                                          Vice President, Secretary 
                                          and General Counsel

March 30, 1998

                                   IMPORTANT

       We cordially invite you to attend the Annual Meeting of Shareholders,
but IF YOU DO NOT EXPECT TO BE PRESENT, PLEASE MAIL YOUR PROXY IN ORDER THAT
THE PRESENCE OF A QUORUM MAY BE ASSURED.  Because our shares are widely
distributed over a large number of holders, it is both necessary and desirable
that all Shareholders send in their proxies.  Failure to secure a quorum on
the date set would necessitate an adjournment which would cause the System
considerable and needless expense.  To avoid this, please SIGN AND DATE the
accompanying proxy and mail it promptly in the enclosed envelope to
Commonwealth Energy System, P.O. Box 9150, Cambridge, Massachusetts
02142-9150.
<PAGE>
<PAGE 3>


                                PROXY STATEMENT

       This statement is furnished in connection with the solicitation of
proxies by the Board of Trustees of Commonwealth Energy System (hereinafter
called the "System") to be used at the Annual Meeting of Shareholders of the
System to be held on Thursday, May 7, 1998, at the principal executive office
of the System, One Main Street, P.O. Box 9150, Cambridge, Massachusetts
02142-9150, of which due notice has been given in accordance with the System's
Declaration of Trust dated December 31, 1926, as amended.  If the enclosed
form of proxy is executed and returned, it may nevertheless be revoked at any
time insofar as it has not been exercised.  A properly executed and returned
proxy will be voted in accordance with the directions contained thereon. 
Abstentions shall be voted neither "for" nor "against," but shall be counted
in the determination of a quorum.  Broker non-votes shall not be counted
either in calculating the number of shares present for the purpose of
determination of a quorum or for the purpose of determining whether a matter
has received the required number of votes.  The giving of a later-dated proxy
revokes all proxies previously given.  The approximate date on which this
Proxy Statement and the accompanying proxy card will first be mailed to
Shareholders is March 30, 1998.

                             FINANCIAL STATEMENTS

       The audited financial statements of Commonwealth Energy System and
Subsidiary Companies, which include comparative Consolidated Balance Sheets as
of December 31, 1997 and 1996, Consolidated Statements of Income and
Consolidated Statements of Cash Flows for the three years ended December 31,
1997 and the Report of Independent Public Accountants are set forth in the
Annual Report to Shareholders.

                               VOTING SECURITIES

       Each Common Share is entitled to one vote.  Only Shareholders of record
at the close of business on March 17, 1998 are qualified to vote at the
meeting.  There were outstanding as of the record date 21,561,282 Common
Shares.

       The Employees Savings Plan of Commonwealth Energy System and Subsidiary
Companies owned beneficially 2,617,000 Common Shares representing 12% of the
outstanding Common Shares as of February 28, 1998.  Members of the Plan are
entitled to give voting instructions with respect to their interests.

                 OWNERSHIP BY MANAGEMENT OF VOTING SECURITIES

       The following table shows the beneficial ownership, reported to the
System as of February 28, 1998, of Common Shares of the System owned by the
Chief Executive Officer and the four other most highly paid Executive Officers
and, as a group, all Trustees and Executive Officers of the System.

                                               Total
                                               Common         Percent of
      Name                                     Shares (1)        Class  

      William G. Poist                          20,472           0.1%
      Russell D. Wright                         12,055           0.1%
      James D. Rappoli                           8,257           0.1%
      Michael P. Sullivan                        6,946           0.1%
      John R. Williams                           6,013           0.1%
      All Trustees and Executive Officers
        as a group (13 persons)                 71,967           0.3%
<PAGE>
<PAGE 4>


(1)   Beneficial ownership set forth in this Proxy Statement includes, where
      applicable, shares with respect to which voting or investment power is
      attributed to an Executive Officer or Trustee because of joint fiduciary
      ownership of the shares or relationship of the Executive Officer or
      Trustee to the record owner, such as a spouse, together with shares held
      under the Employees Savings Plan of Commonwealth Energy System and
      Subsidiary Companies.

                   MATTERS TO BE BROUGHT BEFORE THE MEETING

                            1-ELECTION OF TRUSTEES

      Three Trustees will be elected at the Annual Meeting of Shareholders to
hold office for the ensuing three years in accordance with the Declaration of
Trust which provides for staggered terms of Trustees of three years each.  The
three Trustees elected at this meeting will hold office for a three-year term
and until the election and qualification of their respective successors. 
Under the terms of the Declaration of Trust, Trustees are required to be
elected by a plurality vote of the Shareholders.

      The Shares represented by the enclosed form of proxy will be voted, and
the persons named in such form of proxy will, unless otherwise directed in the
proxy, vote shares represented by proxies received for the election of the
following nominees:

                              Sheldon A. Buckler
                               Betty L. Francis
                             Michael C. Ruettgers

      It is not contemplated that any of the three nominees will be unable to
serve.  Should any of the nominees be unable to serve, your proxy will be
voted for the election of a nominee acceptable to the remaining Trustees.

                 INFORMATION CONCERNING NOMINEES AND TRUSTEES

                                                                 Common Shares
                                                                 Beneficially
                                               Year First        Owned as of
                                                Became a         February 28,
Name, Principal Occupation and Term of Office   Trustee    Age       1998     

(A) KEVIN C. BRYANT, Regional President, 
(D)   BankBoston - South Region, Fall River, 
      Massachusetts
      TERM EXPIRES IN 2000.................      (1997)     37         200

(C) SHELDON A. BUCKLER, Chairman of the Board
      of Commonwealth Energy System; Retired
      Vice Chairman of the Board and a 
      Director, Polaroid Corporation, 
      Cambridge, Massachusetts (Manufacturer 
      of photographic equipment and supplies); 
      Director, Aseco Corp.; Cerion Technologies, 
      Inc.; Nashua Corporation; Parlex Corp. 
      and Spectrum Information Technologies, Inc.
      TERM EXPIRES IN 1998 (NOMINEE).......      (1991)     66       6,260
<PAGE>
<PAGE 5>


                  INFORMATION CONCERNING NOMINEES AND TRUSTEES
                                                                 Common Shares
                                                                 Beneficially
                                               Year First        Owned as of
                                                Became a         February 28,
Name, Principal Occupation and Term of Office   Trustee    Age        1998    

(A) PETER H. CRESSY, Chancellor, University of
(E)   Massachusetts Dartmouth, North Dartmouth,
      Massachusetts; Retired Rear Admiral,
      United States Navy
      TERM EXPIRES IN 1999 ...............       (1994)     56         337

(A) BETTY L. FRANCIS, Executive Vice President
(D)   and Chief Credit Officer, HomeSide
      Lending, Inc., Jacksonville, Florida
      TERM EXPIRES IN 1998(NOMINEE) ......       (1991)     51         200

(C) FRANKLIN M. HUNDLEY, Of Counsel,
(D)   Rich, May, Bilodeau & Flaherty,
      P.C., Boston, Massachusetts (Attorneys);
      Director, The Berkshire Gas Company
      TERM EXPIRES IN 2000................       (1985)     63       5,108

(B) WILLIAM J. O'BRIEN, Partner, Centre For
(C)   Generative Leadership L.L.C., Hamilton,
      Massachusetts (Consulting); Retired
      President and CEO, The Hanover Insurance
      Company
      TERM EXPIRES IN 1999 ..................    (1994)     65       3,500

    WILLIAM G. POIST, President and Chief
      Executive Officer of Commonwealth Energy
      System and Chairman and a Director of 
      its subsidiary companies
      TERM EXPIRES IN 1999 ...................   (1992)     64      20,472

(B) MICHAEL C. RUETTGERS, President, Chief
(E)   Executive Officer and a Director, EMC
      Corporation, Hopkinton, Massachusetts
      (Data storage technology); Director,
      EG&G Inc.
      TERM EXPIRES IN 1998(NOMINEE) .........    (1995)     55       1,000

(B) GERALD L. WILSON, Vannevar Bush Professor of
(E)   Engineering, Massachusetts Institute of
      Technology, Cambridge, Massachusetts;
      Director, Analogic Corp. and Aseco Corp.
      TERM EXPIRES IN 2000....................   (1985)     58       1,619

      Each of the persons named above has held his or her present position (or
another executive position with the same employer) for more than the past five
years.

      During 1997, fees of $308,174 were incurred for legal services rendered
by the firm of Rich, May, Bilodeau & Flaherty, P.C., of which Mr. Hundley is 
Of Counsel. The firm has been employed in the last fiscal year and the current
fiscal year.
<PAGE>
<PAGE 6>


      Each Trustee, including nominees, owned beneficially less than one-third
of one percent of the outstanding Common Shares.

(A)   Member of Audit Committee.
(B)   Member of Executive Compensation Committee.
(C)   Member of Nominating Committee.
(D)   Member of Benefit Review Committee.
(E)   Member of Strategic Planning Committee.
<PAGE>
<PAGE 7>


            COMPENSATION OF EXECUTIVE OFFICERS DURING THE YEAR 1997

      The following table shows compensation paid by the System and its
subsidiaries to the System's President and Chief Executive Officer and the
four other highest paid Executive Officers of the System whose total
compensation in 1997 exceeded $100,000.
<TABLE>
                          SUMMARY COMPENSATION TABLE
<CAPTION>
                                                     Long-Term Compensation   
                        Annual Compensation        Awards      Payouts
                                                                        Long-
                                                                        Term
                                                               Options  Incen-
                                                Other   Restr- /Stock   tive   All
                                                Annual  icted  Apprec-  Plan   Other
                                                Compen- Stock  iation  (LTIP) Compen-
 Name and                     Salary            sation  Awards Rights  Payouts sation
 Principal Position     Year    (1)    Bonus      (2)    (3)   (SARS)    (4)     (5)  
<S>                     <C>  <C>      <C>         <C>  <C>       <C>  <C>      <C>
William G. Poist        1997 $388,200 $160,290    -        -     -    $134,900 $15,528
 President and Chief    1996  380,000  142,142    -    $160,000  -        -     15,204
 Executive Officer of   1995  350,000   95,645    -       -     -              14,004
 the System and Chair-
 man of its subsidiary 
 companies

Russell D. Wright       1997 $276,333 $118,825    -        -     -    $100,800 $10,977
 Chief Executive        1996  250,000   97,427    -   $100,000  -        -     10,020
 Officer of Utility     1995  231,667   66,060    -       -     -        -      9,269
 Operations
 
James D. Rappoli        1997 $194,967 $ 75,370    -        -     -    $ 53,040 $ 7,797
  Financial Vice        1996  178,167   60,740    -    $ 54,800  -        -      7,126
  President and         1995  164,583   46,624    -        -     -        -      6,586
  Treasurer of the
  System and its
  subsidiary companies

Michael P. Sullivan    1997 $173,667 $ 66,154    -        -     -    $ 48,360 $ 6,944
  Vice President,      1996  161,666   55,121    -    $ 54,000  -        -      6,229
  Secretary and General 1995  151,000   43,278    -        -     -        -      6,044
  Counsel of the System
  and its subsidiary
  companies

John R. Williams       1997 $154,858 $ 58,219    -        -     -    $ 51,991 $ 6,191
  Vice President -     1996  149,883   50,790    -    $ 58,000  -        -      5,796
  Corporate Services   1995  149,400   35,812    -        -     -        -      5,976
  of COM/Energy
  Services Company
</TABLE>
- --------------------
<PAGE>
<PAGE 8>


(1)   The amounts in this column represent the aggregate total of cash
      compensation received and compensation deferred by the
      above-named individuals.  Compensation is deferred pursuant to
      the provisions of the Employees Savings Plan of Commonwealth
      Energy System and Subsidiary Companies and the Executive Salary
      Continuation and Excess Benefit Plan for Employees of
      Commonwealth Energy System and Subsidiary Companies.

(2)   The dollar value of perquisites and other personal benefits,
      securities or property totaling either $50,000 or 10% of total
      annual salary and bonus, together with various other earnings,
      amounts reimbursed for the payment of taxes and the dollar value
      of any stock discounts not generally available are required to be
      disclosed in this column.  In 1997, there were no such
      perquisites, earnings, reimbursements or discounts paid or made.

(3)   The amounts in this column represent the value of the restricted
      stock award made in 1997 which was calculated by multiplying the
      average closing market price of the System's Common Shares at the
      time of the grant by the number of Common Shares awarded.  The
      restrictions on these shares shall lapse three years from the
      date of grant provided that the individual is still in the employ
      of the System.  Dividends are paid on the restricted Common
      Shares to the same extent as they are paid on the System's Common
      Shares. The aggregate number of restricted Common Share holdings
      for the above-named Executive Officers as of February 28, 1998 is
      17,952 Common Shares, having an aggregate value of $647,394.

(4)   The amounts in this column represent the cash awards made in 1998
      under the terms of the 1996-1997 Strategic Plan Compensation
      Program.  The Program measured System Common Share performance,
      (requiring System Common Share total return of at least 95% of
      industry average for award consideration), together with both the
      Executive Officer's contributions to the System's Strategic Plan
      over the two-year period and each Executive Officer's general
      performance.

(5)   The amounts in this column represent the aggregate contributions or
      account credits made by the System and certain subsidiary companies
      during 1997 on behalf of the above-named individuals to the Employees
      Savings Plan of Commonwealth Energy System and Subsidiary Companies and
      the Executive Salary Continuation and Excess Benefit Plan for Employees
      of Commonwealth Energy System and Subsidiary Companies.  The Employees
      Savings Plan of Commonwealth Energy System and Subsidiary Companies is
      a defined contribution plan.  The Plan incorporates salary deferral
      provisions pursuant to Section 401(k) of the Internal Revenue Code for
      all employees who have elected to participate on that basis.  The
      Executive Salary Continuation and Excess Benefit Plan for Employees of
      Commonwealth Energy System and Subsidiary Companies is a defined
      contribution/defined benefit plan.  Unlike the Employees Savings Plan,
      this Plan is not a qualified plan under Section 401(a) of the Internal
      Revenue Code.  The Plan was established to provide an additional
      benefit to eligible participants in the Employees Savings Plan whose
      benefit under that Plan would be curtailed by limits in effect under
      the Internal Revenue Code for qualified plans.  Of the amounts set
      forth in the "All Other Compensation" column, $6,333, $2,375, $2,374,
      $2,375 and $4,692 represent the contributions made on behalf of Messrs.
      Poist, Wright, Rappoli, Sullivan and Williams, respectively, by the
      Employees Savings Plan. Amounts credited to the accounts of Messrs.
      Poist, Wright, Rappoli, Sullivan and Williams by the Executive Salary
      Continuation and Excess Benefit Plan in 1997 equaled $9,195, $8,602,
      $5,423, $4,569 and $1,499, respectively.
<PAGE>
<PAGE 9>


                              PENSION PLAN TABLE

      The following table shows annual retirement benefits payable to
employees, including Executive Officers, upon retirement at age 65, in various
compensation and years of service classifications, assuming the election of a
retirement allowance payable as a life annuity from the Pension Plan for
Employees of Commonwealth Energy System and Subsidiary Companies and the
Executive Salary Continuation and Excess Benefit Plan for Employees of
Commonwealth Energy System and Subsidiary Companies, as of December 31, 1997.
<TABLE>
<CAPTION>
    Highest Annual
  Consecutive 3-Year
    Average Base
    Salary of Last               Annual Benefit for Years of Service (1)
      10 Years         10 Years   15 Years  20 Years   25 Years   30 Years   35 Years
    <S>                <C>        <C>       <C>        <C>        <C>        <C>
    $ 90,000 ....      $ 15,673   $ 23,509  $ 31,345   $ 39,181   $ 47,018   $ 51,104
     120,000 ....        21,173     31,759    42,345     52,931     63,518     69,104
     150,000 ....        26,673     40,009    53,345     66,681     80,018     87,104
     180,000 ....        32,173     48,259    64,345     80,431     96,518    105,104
     210,000 ....        37,673     56,509    75,345     94,181    113,018    123,104
     240,000 ....        43,173     64,759    86,345    107,931    129,518    141,104
     270,000 ....        48,673     73,009    97,345    121,681    146,018    159,104
     300,000 ....        54,173     81,259   108,345    135,431    162,518    177,104
     330,000 ....        59,672     89,509   119,345    149,181    179,018    195,104
     360,000 ....        65,172     97,759   130,345    162,931    195,518    213,104
     390,000 ....        70,672    106,009   141,345    176,681    212,018    231,104
     420,000 ....        76,172    114,259   152,345    190,431    228,518    249,104
     450,000 ....        81,672    122,509   163,345    204,181    245,018    267,104

- -------------
<FN>
(1)   Federal law places certain limits on the amount of benefits which can be
      paid from qualified pension plans.  Payments made by the System in
      excess of the applicable limitations are made pursuant to the terms of
      the Executive Salary Continuation and Excess Benefit Plan for Employees
      of Commonwealth Energy System and Subsidiary Companies.  For 1997, the
      maximum annual compensation limit under the Pension Plan for Employees
      of Commonwealth Energy System and Subsidiary Companies was $160,000, and
      the maximum annual benefit under that Plan was $125,000.
</TABLE>
      The Pension Plan is a non-contributory defined benefit plan.  The Plan
is a final average earnings type plan under which benefits reflect the
employee's years of credited service.  The employee receives the higher of
either a Social Security integrated or non-integrated formula to realize the
maximum retirement benefit applicable to his or her employment history.  Both
of the formulae are based on the average of the three highest consecutive
January 1 base salaries during the ten-year period preceding the employee's
retirement or termination.  Retirement benefits are available to employees on
or after age fifty-five provided the sum of their age and years of service is
at least seventy-five.  Messrs. Poist, Wright, Rappoli, Sullivan and Williams
have 33, 30, 23, 22 and 23 credited years of service respectively. For the
purposes of calculating the annual retirement benefits of Messrs. Poist,
Wright, Rappoli, Sullivan and Williams pursuant to the Plan, only the amounts
set forth in the summary compensation table as "Salary" are utilized to
determine each Executive Officer's three highest consecutive January 1 base
salaries during the ten-year period preceding the Executive Officer's
retirement or termination.
<PAGE>
<PAGE 10>


      Each Executive Officer of the System has elected certain pre-retirement
death benefits and supplemental retirement benefits in exchange for waiving
certain standard life insurance benefits (in excess of $50,000), and the
survivor income benefits generally available to all eligible employees.  The
alternative program for Executive Officers provides a pre-retirement death
benefit of either:  (i) a lump-sum payment of three times annual base salary
or (ii) fifty percent of monthly base salary for one hundred and eighty
months.  The supplemental retirement benefit provides that an Executive
Officer may retire after the attainment of age fifty-five and completion of
ten years of service.  Normal retirement at age sixty-five provides an annual
payment equal to thirty-five percent of final base salary per year for life or
for a period of one hundred and eighty months, whichever is longer.  Benefits
are reduced for retirement prior to age sixty-five.  The supplemental
retirement benefits are in addition to the amounts shown in the table above
and are not subject to limitation.  If termination of employment occurs
following a change in control of the System after the Executive Officer's
completion of ten years of service with the System but before the attainment
of age fifty-five, the Executive Officer shall be entitled to receive upon
attainment of age fifty-five a retirement benefit equal to the amounts that
would have been payable had the Executive Officer remained in the employment
of the System until the date of the Executive Officer's fifty-fifth birthday
and retired on that date.  Should the employment of the Executive Officer
terminate for any other reason (other than death) and before completion of ten
years of service and attainment of age fifty-five, there are no benefits
payable under this alternative program for Executive Officers. 

      The System has entered into Severance Agreements with its Executive
Officers, including Messrs. Poist, Wright, Rappoli, Sullivan and Williams. 
The Severance Agreements provide that in the event of termination of
employment following a change of control of the System, as defined in the
Severance Agreements, the System shall pay to the Executive Officer a lump sum
severance benefit together with certain other benefits. The severance benefit
payable to Mr. Poist is up to three times his annual salary and annual
incentive compensation, and to Messrs. Wright, Rappoli, Sullivan and Williams
up to two times annual salary and annual incentive compensation.  No benefit
would be paid if the effect of any payment would be to provide benefits above
those normally payable beyond age sixty-five.  

<PAGE>
<PAGE 11>


            SECTION 16(a) BENEFICIAL OWNERSHIP REPORTING COMPLIANCE

      Section 16(a) of the Securities Exchange Act of 1934, as amended,
requires Trustees, Executive Officers and persons who beneficially own more
than ten percent (10%) of the System's Common Shares to file initial reports
of ownership on Form 3 and reports of changes in ownership on Form 4 and/or
Form 5 with the Securities and Exchange Commission (the "Commission") and any
national securities exchange on which the System's securities are registered. 
Trustees, Executive Officers and greater than ten percent (10%) beneficial
owners are required by the Commission's regulations to furnish the System with
copies of all Section 16(a) forms they file.

      Based on a review of the copies of such forms furnished to the System
and written representations from the Trustees and Executive Officers, the
System believes that all Section 16(a) filing requirements applicable to its
Trustees, Executive Officers and greater than ten percent (10%) beneficial
owners were complied with for 1997.


            COMPENSATION COMMITTEE REPORT ON EXECUTIVE COMPENSATION

      The Executive Compensation Committee of the Board of Trustees (the
"Committee") is composed of three independent, non-employee Trustees.  The
Committee reviews and approves compensation levels for the System's Chief
Executive Officer and oversees the System's executive compensation programs
affecting all Executive Officers.  These programs have been designed in order
to attract, retain, motivate and reward those individuals who are most
responsible for the System's growth and profitability.  The programs reflect
the Committee's objectives of tying a substantial portion of each Executive
Officer's compensation to both the System's and the individual's success in
meeting designated goals and objectives and in realizing increases in total
shareholder return.

      Compensation for Executive Officers consists of base salary and awards
of cash incentive compensation under the System's Annual Incentive Plan and
1996-1997 Strategic Plan Compensation Program.  Long-term incentive awards in
the form of restricted stock awards of Common Shares are made under the terms
of the System's Long Term Incentive Plan.  Executive Officers also participate
in the Pension Plan and the Employees Savings Plan and receive benefits under
medical and other benefit plans which are available to employees generally. 

Base Salary

      In setting the base salaries for the Chief Executive Officer and all
other Executive Officers, the Committee evaluates the general responsibilities
of the particular position and the individual's experience in that position
and also applies the data and criteria described in the next paragraph. 
The Chief Executive Officer's base salary target is designed generally to
match the market median for the utility reference group described in the next
paragraph.  The Committee adjusts the Chief Executive Officer's salary in
relation to the salary range target through the evaluation of the same
objective criteria used to determine the Chief Executive Officer's annual
incentive award set forth below.  Less emphasis is placed on base salary
adjustments than on incentive compensation, consistent with the Committee's
objectives of placing increasingly greater emphasis on performance based,
at-risk incentive compensation.
<PAGE>
<PAGE 12>


      In setting the Chief Executive Officer's base salary for 1997, the
Committee surveyed and reviewed compensation levels and the reference criteria
relating to such compensation levels within the gas and electric utility
industry.  Compensation data and comparisons were provided to the Committee by
independent sources and were used by the Committee together with market
compensation data provided by the System's human resources department,
compensation reports contained in proxy materials for companies considered by
the Committee to be similar to the System in size, responsibility and
complexity and utility industry references such as those provided by the
Edison Electric Institute.  Among the reference criteria reviewed by the
Committee in developing external market pay norms were business type
(investor-owned utilities), scope (utilities with revenues of approximately
$500 million to $2 billion) and location (utilities headquartered in the
northeast region of the U.S.).  This market reference group of companies
represents a subset of Value Line, Inc.'s utility sample.

Annual Incentive Compensation

      The Chief Executive Officer is eligible to receive annual cash bonus
compensation under the System's Annual Incentive Plan.  In 1997, the Annual
Incentive Plan provided for awards to the Chief Executive Officer of up to a
maximum of 43.5% of annual base salary.  Both individual and System
performance goals and objectives were set.  The Chief Executive Officer's
award for 1997 was determined on a weighted basis, with two-thirds of the
award potential attributable to the attainment of System goals and objectives
and one-third of the award potential attributable to individual goals and
objectives.  For 1997, the System criteria forming the goals and objectives
applicable to the Annual Incentive Plan were: 1) meeting pre-established
targets comparing System actual net income to budgeted net income for 1997; 2)
success in implementing budgetary constraints in the interest of controlling
costs; and 3) meeting certain pre-established benchmark measures of operation
and maintenance expenses per customer, as compared to a peer group of 18
utility companies recommended by the System's independent compensation
consultant.  Each of the three System goals and objectives are equally
weighted, and awards are made based on meeting, exceeding or reaching maximum
attainment of targets. 

      The goal established for actual net income was to meet or exceed the
approved budgeted amounts.  The System's 1997 net income exceeded targeted net
income by 9.8%, just below the 10% maximum award standard.  The goal
established for cost control was for operation and maintenance expenses in
1997 to be below the approved budgeted amounts.  This goal was exceeded by the
System having reduced actual operation and maintenance expenses to 3.8% below
established budgets.  The goal of maintaining operation and maintenance
expenses per customer within the top 50% of the 18 company industry peer group
was also exceeded, as the System was rated the fifth most effective of the 18
companies in controlling operation and maintenance expenses.  In the
aggregate, the goals and objectives applicable to the System component of the
Annual Incentive Plan were rated as 96% achieved.

      The individual goals of the Chief Executive Officer for 1997 under the
Annual Incentive Plan included: the Chief Executive Officer's contributions in
creating a value-added organization; implementation of the System's Strategic
Plan; oversight of the consolidation of gas and electric operations; and the
effective continuance and expansion of the System's investor relations
program.  Performance relative to achieving individual goals was rated as 85%
achieved, resulting in an aggregate performance rating of 92% achievement.
<PAGE>
<PAGE 13>


Long-Term Compensation

      The System has in place two long term incentive compensation plans, one
which provides for the potential of awards of restricted Common Shares of the
System and the other providing for the potential of cash awards.

      The Long-Term Incentive Plan, approved by shareholders in 1994, measures
performance and provides for the potential for awards of Common Shares over a
three-year Plan Period.  The Plan provides for awards to the Chief Executive
Officer of up to a maximum of 50% of annual base salary, awarded in the form
of restricted Common Shares.  Awards of Common Shares under the Plan are made
if the System's average three-year total return (share appreciation and
dividends), as compared to the peer group index of utility companies as
established by Value Line, Inc., meets or exceeds the achievement standards
set by the Committee at the beginning of a Plan Period.  In this way, the
interests of Executive Officers and Shareholders continue to be aligned.

      Under the terms of the Plan, no three-year Plan Period was in effect for
1995-1997, and as a result no award was made.

      The 1996-1997 Strategic Plan Compensation Program ("Program") provided
Executive Officers the opportunity to receive cash awards up to an amount
which is equivalent to the amount which would be awarded in Grant Shares under
the terms of the Long Term Incentive Plan as if a three-year Plan Period
ending in 1997 was in effect.  Unlike the Long Term Incentive Plan, which uses
Shareholder total return as the sole criterion, the Program rated System
Common Share performance, the Executive Officer's specific contributions to
achieving results in implementing the System's Strategic Plan, and the Chief
Executive Officer's general and overall performance.  For the two-year Program
period, commencing in 1996, the Threshold, Program Target and Maximum
Shareholder Return achievement standards were 95% of Index Average, Index
Average, and 120% of Index Average, respectively.  During the Program period,
the System's average annual total return was equal to 219% of the Value Line
peer group's total return, which under the terms of the Program provided for a
maximum potential award to the Chief Executive Officer of up to 50% of 1996
annual base salary.  The individual performance of the Chief Executive Officer
under the Plan was rated at 71% achieved, resulting in a cash award pursuant
to the terms of the Program of 35.5% of his 1996 annual base salary.

Other Executive Officers

      The Chief Executive Officer, in conjunction with the System's human
resources department and an independent consultant, established salary ranges
for each Executive Officer.  The salary ranges were based in part upon
salaries provided to executive officers in the System's industry peer group,
as reported by the Edison Electric Institute and from regional salary surveys,
so as to establish salary ranges generally in the median of the peer group. 
Specific salary levels were then established through an evaluation of the
responsibilities of the position, the individual's experience in that position
and the Executive Officer's achievement of goals and performance of duties. 
The base salary levels, as recommended by the Chief Executive Officer, were
also reviewed and approved by the Executive Compensation Committee.

      In addition to base salary, the named Executive Officers are also
eligible to receive compensation under the Annual Incentive Plan, the Long
Term Incentive Plan and the 1996-1997 Strategic Plan Compensation Program. 
The named Executive Officers are eligible to receive compensation of up to a
maximum of 38% (for Vice Presidents) to 43.5% (for the Operating Companies'
President) of annual base salary under the Annual Incentive Plan and of up to
40% (for Vice Presidents) to 50% (for the Operating Companies' President) of
<PAGE>
<PAGE 14>


annual base salary in restricted Common Shares under the Long Term Incentive
Plan and in cash awards under the 1996-1997 Strategic Plan Compensation
Program. In 1997, the System goals and objectives constituting the annual
performance criteria and the corresponding weightings which determined
eligibility for awards to the named Executive Officers under the Annual
Incentive Plan were the same as those applicable to the Chief Executive
Officer.  The individual goals and objectives of the other Executive Officer
Annual Incentive Plan participants included: negotiating critical contracts
relating to System electric generation plants; overseeing important state
legislation affecting the System's electric operations; and continuing and
expanding the System's investor relations program.

      The performance criteria applicable to the named Executive Officers
under the Long Term Incentive Plan and the 1996-1997 Strategic Plan
Compensation Program are the same as those applicable to the Chief Executive
Officer.

Policy on Deductibility of Compensation

      Pursuant to Section 162(m) of the Internal Revenue Code, the ability of
the System to deduct the compensation paid to any of the five most highly paid
officers in excess of $1 million is limited by Federal Law.  The compensation
of each of the System's Executive Officers, however, is lower than the $1
million threshold at which tax deductions are limited. It is therefore not
necessary that the Committee formulate a policy with respect to qualifying
compensation for deductibility under the Internal Revenue Code.

Conclusion

      The Committee continues to take action to link executive compensation
directly to corporate performance and shareholder total return.  A substantial
portion of each Executive Officer's compensation is now dependent upon
measurable individual performance and System Common Share appreciation.

                    THE EXECUTIVE COMPENSATION COMMITTEE
                    Michael C. Ruettgers, Chairperson
                    William J. O'Brien
                    Gerald L. Wilson
<PAGE>
<PAGE 15>


                     COMPARATIVE TOTAL SHAREHOLDER RETURN

      The line graph below compares the cumulative total shareholder return
for the System's Common Shares to the cumulative total return of the S&P 500
Stock Index and a Peer Group Index which is comprised of 87 utility companies
(including the System) which are followed by Value Line, Inc.  The entities
which comprise the Peer Group are also set forth hereinafter.

                      Comparative Five-Year Total Returns
         Commonwealth Energy System, S&P 500 and Value Line Peer Group
                    (Performance results through 12/31/97)


        ---------------------------------------------------------------


                          Line graph illustration of

                 comparative five-year (1993-1997) cumulative

                     total returns based on values listed

                                in chart below.


        ---------------------------------------------------------------


                   1992      1993      1994      1995      1996      1997

      COM/Energy   $100      $116      $ 98      $130      $145      $220
      S&P 500       100       110       112       154       190       253
      Peer Group    100       112        98       129       130       166

      Assumes $100 invested at the close of trading on the last trading day of
      1992 in COM/Energy Common Shares, S&P 500 and the Peer Group.  Also
      assumes reinvestment of dividends.

      Source: Value Line, Inc.

                                  PEER GROUP

Allegheny Power System, Inc.              MDU Resources Group, Inc.
Ameren Corp.                              MidAmerican Energy Holdings Company
American Electric Power Co., Inc.         Minnesota Power & Light Co.
Atlantic Energy Inc.                      Montana Power Co.
Baltimore Gas and Electric Company        Nevada Power Co.
Boston Edison Company                     New Century Energies, Inc.
Carolina Power & Light Co.                New England Electric System
Central Hudson Gas & Electric Corp.       New York State Electric & Gas Corp.
Central Louisiana Electric Company Inc.   Niagara Mohawk Power Corporation
Central Maine Power Co.                   NIPSCO Industries, Inc.
Central & South West Corp.                Northeast Utilities
Central Vermont Public Service Corp.      Northern States Power Co.
CILCORP Inc.                              Northwestern Public Service Co.
CINergy Corp.                             OGE Energy, Inc
CMS Energy Corp.                          Orange and Rockland Utilities, Inc.
Commonwealth Energy System                Otter Tail Power Co.
<PAGE>
<PAGE 16>


Consolidated Edison Co. of New York, Inc. PG&E Corporation
DPL, Inc.                                 PacifiCorp.
Delmarva Power & Light Co.                PECO Energy Company
Dominion Resources, Inc.                  Pinnacle West Capital Corp.
DQE                                       Potomac Electric Power Co.
DTE Energy Corporation                    PP&L Resources, Inc.
Duke Power Co.                            Public Service Co. of New Mexico
Eastern Utilities Associates              Public Service Enterprise Group Inc.
Edison International                      Puget Sound Power & Light Co.
Empire District Electric Company          Rochester Gas and Electric Corp.
Enova Corporation                         St. Joseph Light & Power Co.
Entergy Corporation                       SCANA Corp.
FirstEnergy Corp.                         Sierra Pacific Resources
Florida Progress Corp.                    SIGCORP
FPL Group, Inc.                           The Southern Company
GPU, Inc.                                 TECO Energy, Inc.
Green Mountain Power Corp.                Texas Utilities Company
Hawaiian Electric Industries, Inc.        TNP Enterprises, Inc.
Houston Industries, Incorporated          Unicom Corp.
Idaho Power Co.                           Unisource Energy Corp.
IES Industries                            United Illuminating Co.
Illinova Corp.                            UtiliCorp. United Inc.
Interstate Power Co.                      Washington Water Power Co.
IPALCO Enterprises, Inc.                  Western Resources, Inc.
Kansas City Power & Light Co.             Wisconsin Energy Corp.
KU Energy Corporation                     WPL Holdings, Inc.
LG&E Energy Corp.                         WPS Resources Corporation
Long Island Lighting Co.                  

               MEETINGS OF THE BOARD OF TRUSTEES AND COMMITTEES

      The System's Board of Trustees held thirteen meetings throughout 1997. 
The Board has an Audit Committee, an Executive Compensation Committee, a
Nominating Committee, a Benefit Review Committee and a Strategic Planning
Committee.

      The Audit Committee is composed of Betty L. Francis, Chairperson, Kevin
C. Bryant and Peter H. Cressy.  The Committee held four meetings in 1997.  The
Committee's functions are to recommend the selection of an independent public
accountant, to review the scope of and approach to audit work, to review
non-audit services provided by the independent public accountants and to
review accounting principles and practices and the adequacy of internal
controls.

      The Executive Compensation Committee is composed of Michael C.
Ruettgers, Chairperson, William J. O'Brien and Gerald L. Wilson.  During 1997,
the Committee held five meetings. This Committee reviews and recommends
compensation and promotional adjustments for certain of the System's personnel
and also reviews and recommends adjustments to the compensation of Trustees.

      The Nominating Committee is composed of Sheldon A. Buckler, Chairperson,
Franklin M. Hundley and William J. O'Brien.  The Committee held four meetings
in 1997.  The functions of the Committee are to coordinate suggestions or
searches for potential nominees for the position of Trustee, to review and
evaluate qualifications of potential nominees and to recommend to the Board of
Trustees nominees for vacancies occurring from time to time on the Board of
Trustees.  The Committee will consider nominees recommended by Shareholders
upon the timely submission of the names of such nominees with their
qualifications and biographical information forwarded to the Nominating
Committee of the Board of Trustees.
<PAGE>
<PAGE 17>


      The Benefit Review Committee is composed of Franklin M. Hundley,
Chairperson, Kevin C. Bryant and Betty L. Francis.  During 1997, the Committee
held one meeting.  The Committee was organized to consider and recommend to
the Board of Trustees matters associated with the System's major funded
benefit plans.  Functions of the Committee include recommending the
composition of benefit plan boards and reviewing investment policy,
objectives, performance or proposed changes related to the plans.

      The Strategic Planning Committee is composed of Gerald L. Wilson,
Chairperson, Peter H. Cressy and Michael C. Ruettgers.  The Committee held
seven meetings during 1997.  The functions of this Committee are to attend
strategic planning sessions, provide support and insight to management and
coordinate management planning activities with the Board of Trustees.

      Effective January 1, 1998, each Trustee who was not an employee of the
System is compensated for his or her services as Trustee at the rate of
$17,500 per year, plus $1,000 for each Trustee and Committee meeting attended. 
The Chairpersons of the Audit, Executive Compensation, Benefit Review and
Strategic Planning Committees each receive an additional $1,500 during the
year.  In addition, the Chairman of the Board receives a retainer of $20,000
per year for his services as Chairman of the Board and of the Nominating
Committee.

      Trustees are entitled to defer all or a specified portion of their
compensation pursuant to the terms of the Deferred Compensation Plan for
Trustees of Commonwealth Energy System.  An account is established for each
Trustee electing to participate in the Plan, which account is credited with
the amount which would otherwise be payable to the Trustee as compensation for
the Trustee's services.  At the end of each month, interest is credited at an
annual rate equivalent to the weighted average prime lending rate.  Upon the
Trustee's retirement, the account balance is paid either in a lump sum or in
annual installments according to the election made by the Trustee. The rights
of the Trustee in the account are not assignable and constitute an unsecured
claim against the general assets of the System.

      The Retirement Plan for Trustees of Commonwealth Energy System was
adopted to provide retirement benefits to non-management members of the Board
of Trustees in recognition of their services to the System.  Members of the
Board of Trustees who have served as Trustees for at least five years are
eligible to participate in the Plan.  Each eligible Trustee qualifies for an
annual retirement benefit payment equal to fifty percent of the annual
retainer fee in effect at retirement (excluding retainers for chairing
committees), plus 10% of the annual retainer fee for each year in addition to
five years served, up to 100% of such fee.  The annual retirement benefit
payment is adjusted to reflect the first subsequent increase, if any, in the
annual retainer fee for service on the Board following the Trustee's
retirement.  The annual retirement benefit payment becomes vested at the time
of eligibility and is payable to Trustees for a period equal to the greater of
ten years or the number of years of service as a Trustee.  Provided that
Common Shareholders approve the Restricted Common Share Plan for Trustees of
Commonwealth Energy System, the Board will take action to amend the Plan by
limiting the number of years following retirement during which benefits are
paid to a Trustee to the Trustee's number of years of service on the Board as
of June 1, 1998.
<PAGE>
<PAGE 18>


             2-AMENDMENT TO SECTION 22 OF THE DECLARATION OF TRUST

      There will be presented to Shareholders by the Board of Trustees a
proposal to consent to an amendment to Section 22 of the System's Declaration
of Trust, which Section sets forth the conditions under which presently
authorized but unissued Common Shares of the System may be issued by the
Trustees without the vote or written consent of a majority of the Common
Shares outstanding at the time.  The purposes of the amendment are to expand
the conditions under which such presently authorized but unissued Common
Shares may be issued without such vote or written consent of a majority of the
Common Shares outstanding at the time.  The text of the proposed amendment to
Section 22 is annexed as Appendix A to this Proxy Statement.

      The proposed amendment to Section 22 would allow for the issuance of
Common Shares to fund the Restricted Common Share Plan for Trustees of
Commonwealth Energy System, which Shareholders are being requested to approve
at the 1998 Annual Meeting of Shareholders.  The Trustees believe that such
amendment will be in the interest of Shareholders, as it will both enable the
System to continue to attract and retain qualified Trustees and will provide
further incentive to Trustees to maximize shareholder value for the benefit of
Shareholders. The annual Common Share payment amount is projected to be most
representative of the value of retirement benefits which will no longer be
provided under the terms of the Retirement Program for Trustees of
Commonwealth Energy System if the Restricted Common Share Plan is approved.
The Board of Trustees believes that the Restricted Common Share Plan will
provide greater incentives for Trustees and will better align the interests of
Trustees with the interests of Shareholders.

      The required approval by Shareholders to the proposed amendment and the
subsequent enactment of the Restricted Common Share Plan for Trustees of
Commonwealth Energy System will allow the System to continue to attract and
maintain valuable Trustees who will continue to advance the interests of
Shareholders.

      Upon the consent of the holders of a majority of the outstanding Common
Shares present at the meeting and entitled to vote on the proposed amendment,
the Trustees of the System will on May 7, 1998 vote to amend the Declaration
of Trust and will file said Declaration of Trust, as amended, as required by
the terms of the Declaration of Trust and the laws of the Commonwealth
of Massachusetts.

   THE BOARD OF TRUSTEES RECOMMENDS A VOTE "FOR" APPROVAL OF THE AMENDMENT.
<PAGE>
<PAGE 19>


                  3-RESTRICTED COMMON SHARE PLAN FOR TRUSTEES
                         OF COMMONWEALTH ENERGY SYSTEM

      On February 26, 1998, the Board of Trustees approved and adopted,
effective as of June 1, 1998, the Restricted Common Share Plan for Trustees of
Commonwealth Energy System (the "Plan").  Since Plan payments are to be made
in the form of System Common Shares, the Board of Trustees is seeking
Shareholder approval of the Plan and has conditioned the adoption of the Plan
on Shareholder approval.

      The purpose of the Plan is to increase non-employee Trustee ownership
interest in the System by providing compensation for service on the Board of
Trustees in the form of Common Shares, thus further aligning the interests of
the members of the Board with those of Shareholders of the System.  A summary
description of the Plan follows.  This description is qualified in its
entirety by reference to the full text of the Plan, which is attached to this
proxy statement as Appendix B.

      Eligible participants under the Plan are members of the Board of
Trustees who are not full time employees of the System or any of its
subsidiaries.  The Plan provides for issuance annually of a number of Common
Shares equal in value to $7,000 in payment of a portion of the annual Trustee
retainer fee for services on the Board of Trustees.  The number of Common
Shares issuable is determined by dividing the dollar amount of $7,000 to be
distributed in the form of Common Shares by the fair market value of a share
of the Common Shares on the date the fee is payable.  For this purpose fair
market value means the average closing price of the Common Shares in
consolidated trading on the first five trading days of the month that the
Common Shares are issued, as reported by the New York Stock Exchange. 
Pro-rata partial issuances of Common Shares will be made whenever a Trustee
has served on the Board for a portion of a calendar year.

      The annual amount of $7,000 to be paid in Common Shares is equivalent to
the projected additional average retirement benefit which would otherwise be
provided to Trustees under the terms of the Retirement Program for Trustees of
Commonwealth Energy System.  Upon the approval of the Plan, the Board intends
to limit the number of years during which benefits will be paid to a Trustee
upon the Trustee's retirement to the Trustee's number of years of service on
the Board as of June 1, 1998. As a result, no increase in overall Trustee
compensation shall result.  Common Shares issued under the Plan are subject to
restrictions that they may not be sold or transferred until the restrictions
lapse.  Restrictions lapse upon (a) death, (b) disability, (c) retirement in
accordance with the policy on retirement of non-employee Trustees, (d)
termination of service with the consent of a majority of the members of the
Board of Trustees, other than the participant, (e) five years passing from the
date of issuance of the Common Shares, or (f) a change in control, as defined
in the Plan.  If a participant ceases to be a Trustee for any other reason,
the restricted unvested shares are forfeited and revert to the System. The
certificates representing restricted Common Shares are to be held by the
System until the lapse of restrictions, but the participant is entitled to all
voting, dividend and distribution rights of such Common Shares.

      On March 17, 1998 the closing price per share of the Common Shares on
the New York Stock Exchange was $36 5/8.

      The adoption of the Plan will require the affirmative votes of the
holders of a majority of the Shares present at the meeting and entitled to
vote.

   THE BOARD OF TRUSTEES RECOMMENDS A VOTE "FOR" APPROVAL OF THE RESTRICTED
COMMON SHARE PLAN FOR TRUSTEES OF COMMONWEALTH ENERGY SYSTEM.
<PAGE>
<PAGE 20>


                            4-SHAREHOLDER PROPOSAL

      The System has been advised that Mr. John Jennings Crapo, Porter Square
Branch, P.O. Box 151, Cambridge, Massachusetts, 02140-0002, holder of 450
Common Shares, proposes to submit the following proposal at the 1998 Annual
Meeting:

      RESOLVED:  That the shareholders of Commonwealth Energy System assembled
in Annual Meeting of Shareholders balloting in person and by proxy hereby
request that the Board of Trustees present to shareholders at the next Annual
Meeting of Shareholders an appropriate amendment to the Declaration of Trust
dated December 31, 1926, as amended, to provide that any elections following
the adoption of the said amendment, Trustees whose terms have expired be
elected annually and not by classes as is now provided.  But this amendment
shall not apply to any person holding the office of Trustee when this
amendment is presented to stockholders for ratification at the Annual Meeting
of Shareholders in question.

      SUPPORTING STATEMENT:  This proposal to de-classify the Board of
Trustees has received considerable support.  Proponent believes the proposal
will receive more support now that he has modified it to have the amendment to
the Declaration of Trust not go into effect until Trustees who serve at time
as Trustees no longer serve as Trustee/Trustees.  The Trustees make
commitments to serve three years each term as is presently allowed and this
dedication is to be acknowledged by not rudely terminating devoted service to
the Commonwealth Energy System.

      BOARD OF TRUSTEES RECOMMENDATION:

      The Board of Trustees recommends a vote AGAINST this proposal for the
following reasons:

      This proposal has been submitted at various Annual Meetings since 1991. 
It requests that the Board of Trustees submit a proposal to Shareholders at
the 1999 Annual Meeting, calling for the repeal of the classified Board, so
that all Trustees would be elected on an annual basis.  The classified board
was adopted at the 1987 Annual Meeting, when Shareholders voted to amend the
System's Declaration of Trust to create three classes of Trustees with an
equal number of Trustees in each class, and to provide that the Trustees would
serve three-year staggered terms, such that three Trustees are eligible for
election each year.  The classified board is intended to help to ensure
continued familiarity of Board members with the business, management and
policies of the System, since a majority of the Trustees at any given time
would have prior experience as Board members.  These amendments are also
designed to encourage persons seeking to acquire control of the System to
initiate an acquisition through arms-length negotiations with the System's
Board of Trustees and management, by making it more difficult to change the
composition of the Board.  Also, the amendments may allow the System's
management to obtain more time and information for evaluating a takeover
proposal, in order to fully protect the interests of the System and its
Shareholders.

      The Board continues to believe that each Trustee is fully accountable to
Shareholders throughout each term of office, whether that term is three years
or one year.  The Board further notes that the classified board system was
determined to be of sufficient merit such that the Massachusetts legislature
has codified that system in its 1990 amendments to the laws pertaining to
Massachusetts business corporations (however, the System, as a Massachusetts
Trust, is not affected by this legislation).
<PAGE>
<PAGE 21>


      Repeal of the classified Board (which, if the present proposal is
adopted, would actually be pursuant to the acceptance of a proposed Amendment
to the Declaration of Trust to be offered at the 1999 Annual Meeting of
Shareholders) requires the affirmative vote or written consent of
three-quarters of the shares entitled to vote, in accordance with the terms of
the System's Declaration of Trust.

          ACCORDINGLY, A VOTE "AGAINST" THE PROPOSAL IS RECOMMENDED.

                               5-OTHER BUSINESS

      The Board of Trustees of the System knows of no matters other than those
set forth in the Notice of the Annual Meeting which are likely to be brought
before the meeting.  If any other matters of which the Board of Trustees is
not aware are appropriately presented for action, however, it is the intention
of the persons named in the proxy to vote in accordance with their judgment on
such matters.

                                 MISCELLANEOUS

      The independent public accounting firm selected by the Trustees as
Auditor of the System is Arthur Andersen LLP.  It is expected that
representatives of Arthur Andersen LLP will be present at the Annual Meeting
with the opportunity to make a statement if they desire to do so and to
respond to appropriate questions.

      The cost of soliciting proxies will be borne by the System.  A limited
number of regular employees may solicit proxies by telephone or in person
subsequent to the initial solicitation by mail.  In addition, the System has
retained the firm of D. F. King to aid in such solicitation of proxies.  The
System expects to pay such firm a fee of $5,500 plus expenses.  The System
will reimburse banks, brokerage firms and other custodians, nominees and
fiduciaries for reasonable expenses incurred in sending proxy material to
security owners.

      The proxy card for a participant in the System's Dividend Reinvestment
and Common Share Purchase Plan includes the number of shares which are
registered in the participant's name and the number of shares beneficially
owned by the participant that are held in the name of the nominee of the
System for the Plan.  A participant's vote with respect to the shares
registered in the participant's name is also an instruction by the participant
to the nominee to vote the shares credited to the participant's account under
the Plan.

      In order for Shareholder proposals for the 1999 Annual Meeting of
Shareholders to be eligible for inclusion in the System's Proxy Statement,
they must be received by the System at its principal office in Cambridge,
Massachusetts, prior to December 3, 1998.

      It is important that proxies be returned promptly to avoid unnecessary
expense.  Therefore, Shareholders are urged, regardless of the number of
shares owned, to SIGN, DATE and RETURN the enclosed proxy promptly.


                                                 Michael P. Sullivan
                                                 Vice President, Secretary
                                                   and General Counsel

Cambridge, Massachusetts 02142-9150
March 30, 1998
<PAGE>
<PAGE 22>



                                                            APPENDIX A


                             PROPOSED AMENDMENT TO
                    SECTION 22 OF THE DECLARATION OF TRUST



      Section 22 of the System's Declaration of Trust would be amended by
adding the words "and to fund compensation plans applicable to the Board of
Trustees for services as a Trustee" in subparagraph (c) of Section 22,

      so that the third paragraph of Section 22 reads in its entirety, as
follows:

      (A)   To provide the System with Funds
            (1) To acquire additional stock of any subsidiary of the System
      which is authorized for its proper corporate purposes;
            (2) To acquire common stock of any Massachusetts gas or     
      electric company if as a result of such transaction the System will own
      51% or more of such stock;
            (3) To acquire debt securities maturing more than one year from
      the date of issue thereof of any subsidiary of the System;
            (4) To retire temporary indebtedness of the System incurred by it
      for the purchase of such stock or debt securities;
            (5) To make temporary advances to any subsidiary of the System; or

      (B)   In Exchange
            (1) For publicly held stock of any subsidiary of the System;
      or
            (2) For stock of any Massachusetts gas or electric company if as a
      result of such exchange the System will own 51% or more of such stock;
      or

      (C)   To provide shares to fund long-term incentive compensation plans
      that may be adopted from time to time and to fund compensation plans
      applicable to the Board of Trustees for services as a Trustee.
<PAGE>
<PAGE 23>


                                                                  APPENDIX B

                          COMMONWEALTH ENERGY SYSTEM
                   RESTRICTED COMMON SHARE PLAN FOR TRUSTEES

 1.   Name of Plan.  This plan shall be known as the "Commonwealth Energy
System Restricted Common Share Plan for Trustees" and is hereinafter referred
to as the "Plan".

 2.   Purpose.  The purpose of the Plan is to advance the interests of
Commonwealth Energy System (the "System") by providing long-term financial
incentives to Trustees in the form of System Common Shares.  By encouraging
such share ownership, the System seeks to attract, retain and motivate
Trustees of experience, ability and quality and to strengthen the mutuality of
interests between the Board of Trustees and the System's Common Shareholders.

 3.   Effective Date and Term.  The Plan was adopted on February 26, 1998, to
be effective as of June 1, 1998, provided the Plan is approved by the System's
Common Shareholders at the next Annual Meeting of Shareholders of the System
following adoption.  The Plan shall remain in effect until amended or
terminated by action of the Board of Trustees of the System.

 4.   Eligible Participants.  Each member of the Board of Trustees from time
to time who is not a full time employee of the System or any of its
subsidiaries shall be eligible to participate in the Plan (the
"Participants").

 5.   Automatic Receipt of Restricted Shares.  In accordance with the votes
taken by the Board of Trustees on February 26, 1998, until further action by
the Board of Trustees and commencing with the month following approval of the
Plan by the System's Common Shareholders, in addition to the cash retainer fee
compensation established by the Board of Trustees, each Participant shall be
paid annual retainer fees at the rate of $7,000 for service on the Board of
Trustees, payable in Common Shares, par value $2 per share of the System,
subject to the restrictions set forth in Section 6 hereof.  Such fee shall be
payable annually on the date of the Board of Trustees' first regularly
scheduled meeting in a calendar year. The number of Common Shares to be issued
to each Participant on each payment date shall be determined by dividing the
annual retainer fee which is to be paid in Common Shares by the Fair Market
Value of such Common Shares, as hereinafter defined.  A pro-rata issuance of
Common Shares will be made for 1998 and for any period during which a
Participant is entitled to payment for less than a full year.  The Board of
Trustees shall have the authority to revise the amount of annual retainer fees
for service on the Board of Trustees payable in Common Shares under this
Section 5 not more frequently than annually.

 6.   Restrictions on Shares.  The Common Shares issued under Section 5 shall
be restricted and may not be sold or transferred (including, without
limitation, transfer by gift or donation), except that such restrictions shall
lapse upon:

      (a)   Death of the Participant;
      (b)   Disability of the Participant preventing continued service on the  
            Board;
      (c)   Retirement of the Participant from service as a Trustee of the
            System in accordance with the policy on retirement of non-employee
            Trustees then in effect;
      (d)   Termination of service as a Trustee with the consent of a majority
            of the members of the Board other than the Participant; 
<PAGE>
<PAGE 24>


      (e)   The passage of five years from the date of issue of any such
            Common Shares; or
      (f)   A Change in Control, as hereinafter defined.

      If a Participant ceases to be a Trustee of the System for any other
reason, the unvested Common Shares issued to such Trustee subject to this
Section shall be forfeited and shall revert to the System.

      The certificates for Common Shares which are subject to this Section
shall be held by the System until the lapse of restrictions as provided in
this Section; provided, however, the Participant shall be entitled to all
voting, dividend and distribution rights for such Common Shares.

      Participants shall have the right to direct in writing, on forms
provided by the System, that upon the lapse of restrictions in accordance with
subsections (a) through (f) above, the Common Shares held by such Participant
under the Plan shall be transferred and delivered by the System to the
individuals or entities as specified by the Participant on such form.

 7.   Fair Market Value.  The term "Fair Market Value" shall mean the average
closing price of the Common Shares in consolidated trading on the first five
trading days of the month that the Common Shares are issued, as reported on
the principal national securities exchange on which the Common Shares are
listed or admitted to trading.

 8.   Fractions of Shares.  Whenever under the terms of the Plan a fractional
share would be required to be issued, the number of shares shall be rounded up
to the next highest whole number of shares.

 9.   Change in Control.  For the purposes of this Plan, a "change in control"
shall mean the occurrence of any of the following:

      (1)   The System receives a report on Schedule 13D filed with the
            Securities and Exchange Commission disclosing that any person (as
            such term is defined in Section 13(d) of the Exchange Act),group,
            partnership, association, corporation or other entity is the
            beneficial owner, directly or indirectly, of 20% or more of the
            outstanding voting Common Shares of the System (other than: 1) a
            registered investment company which has expressly stated that it
            has no intention to acquire control of the System or which the
            Board of Trustees has determined that such registered investment
            company has no intention to acquire control of the System and 2)
            the Employees Savings Plan of Commonwealth Energy System and
            Subsidiary Companies); provided that if the Board of Trustees
            subsequently determines that such registered investment company
            does intend to acquire control of the System or the registered
            investment company expresses this intent, the beneficial ownership
            of 20% or more of the outstanding voting Common Shares of the
            System shall be considered to be a "change in control" event
            described in this clause (1);

      (2)   Any person (as such term is defined in Section 13(d) of the
            Exchange Act), group, partnership, association, corporation or
            other entity other than the System or a wholly-owned subsidiary of
            the System, purchases shares pursuant to a tender offer or
            exchange offer to acquire voting shares (or securities convertible
            into shares) for cash, securities or any other consideration,
            provided that after consummation of the offer, the person, group,
            partnership, association, corporation or other entity in question
            is the beneficial owner (as defined in Rule 13(d)-3 under the
            Exchange Act) directly or indirectly, of 20% or more of the then
<PAGE>
<PAGE 25>


            outstanding voting Common Shares of the System (calculated as
            directed in paragraph (d) of Rule 13(d)-3 under the Exchange Act
            in the case of rights to acquire Common Shares);

      (3)   The Board of Trustees of the System approves: (a) any
            consolidation or merger of the System in which the System is not
            the continuing or surviving entity or pursuant to which Common
            Shares of the System would be converted into cash, securities or
            other property; or (b) any transaction or series of related
            transactions the result of which all or substantially all the
            assets of the System are sold;

      (4)   The System ceases to be a reporting company pursuant to Section
            13(a) of the Securities Exchange Act of 1934 or any similar
            successor provision; or

      (5)   During any period of two consecutive years (24-month period),
            individuals who at the beginning of such period constituted the
            Board of Trustees of the System cease for any reason (other than
            retirements or resignations in the normal course of business) to
            constitute a majority thereof; provided, however, that any Trustee
            who is not in office at the beginning of such 24-month period, but
            whose election by the Board of Trustees or whose nomination for
            election by the System's Common Shareholders was to fill a vacancy
            caused by death or retirement and was approved by a vote of at
            least two-thirds of the Trustees then still in office and who
            either were Trustees at the beginning of such period or whose
            election or nomination for election was previously so approved,
            shall be deemed to have been in office at the beginning of such
            period for purposes of this definition.

10.   Information Reporting.  At the time the interest of a Participant in the
Common Shares vests, the System will deliver a certificate for such Common
Shares to the Participant and will, in accordance with Internal Revenue
Service regulations, provide to the Participant a Form 1099, reporting the
taxable value of the vested Common Shares, which value shall be based upon the
fair market value of the Common Shares on the date they vest.  If the
Participant shall elect under Section 83 of the Internal Revenue Code of 1986,
as amended, to accelerate the recognition of income attributable to the
receipt of Common Shares, the Participant shall furnish the System with a copy
of such election concurrently with its filing with the Internal Revenue
Service, in which case the System will provide a Form 1099 reporting the
taxable value of the granted Common Shares as of the grant date.

11.   General Restriction.  The issuance of Common Shares or the delivery of
certificates for such Common Shares to Participants hereunder shall be subject
to the requirement that, if at any time the Chief Financial Officer of the
System shall reasonably determine, in his discretion, that the listing,
registration or qualification of such Common Shares upon any securities
exchange or under any state or federal law, or the consent or approval of any
government regulatory body, is necessary or desirable as a condition of, or in
connection with, such issuance or delivery thereunder, such issuance or
delivery shall not take place unless such listing, registration,
qualification, consent or approval shall have been effected or obtained free
of any conditions not reasonably acceptable to the Chief Financial Officer.

12.   Rule 16b-3.  It is the intention that the Plan and the operation thereof
qualify for the exemption provisions contained in Rule 16b-3 adopted by the
Securities and Exchange Commission under the Securities Exchange Act of 1934,
as amended, as in effect from time to time or any successor rule ("Rule").  To
the extent that the implementation or operation of any provision hereof does
not comply with the requirements of the Rule as applicable to the Plan, such
<PAGE>
<PAGE 26>


provision shall be inoperative or shall be interpreted, to the extent
practicable, to apply in a manner not inconsistent with the requirements of
the Rule.

13.   Share Dividends; Share Splits; Share Combinations; Recapitalization. 
The Board of Trustees of the System may make appropriate adjustments in the
maximum number of Common Shares subject to the Plan to give effect to any
share dividends, share splits, share combinations, recapitalizations and other
similar changes in the capital structure of the System.  The provisions
contained in the Plan shall apply to any other capital shares of the System,
and any other securities which may be acquired by the Participant as a result
of a share dividend, share split, share combination, or exchange for other
securities resulting from any recapitalization, reorganization or any other
transaction affecting the Common Shares subject to the Plan.

14.   Termination or Amendment of Plan.
      (a)   Except as provided in paragraph 14(b), the Board of Trustees may
            at any time suspend, reinstate, or terminate the Plan or make such
            changes in or additions to the Plan as it deems advisable without
            further action on the part of the Common shareholders of the
            System, provided;

            (i)   that no such termination or amendment shall adversely affect
                  or impair any then issued and outstanding Common Shares
                  without the consent f the Participant holding such Common
                  Shares; and

            (ii)  that no such amendment which (a) materially increases the
                  maximum number of Common Shares subject to this Plan; (b)
                  materially increases the benefits accruing to Participants
                  under the Plan (except as is provided in Section 5); or (c)
                  materially modifies the requirement as to eligibility for
                  participation in the Plan may be made without first
                  obtaining shareholder approval, if independent legal counsel
                  advises that such approval is necessary.

      (b)   In the event of a change in control (as defined in Section 9), the
            System may neither terminate the Plan nor reduce benefits under
            the Plan with respect to those individuals who are Participants as
            of the date of the change in control.

15.   Shares Subject to the Plan.  The maximum number of Common Shares which
may be cumulatively granted under the Plan, subject to adjustment as provided
in Paragraph 13 of the Plan, shall be one percent (1%) of the total issued and
outstanding Common Shares of the System.  Any Common Shares which are
forfeited pursuant to Section 6 shall again be eligible for issuance.

16.   Governing Law.  This Plan shall be subject to and construed in
accordance with the laws of the Commonwealth of Massachusetts.

<PAGE>
<PAGE 27>


                          COMMONWEALTH ENERGY SYSTEM
               Proxy-Annual Meeting of Shareholders-May 7, 1998
          This Proxy is Solicited on Behalf of the Board of Trustees

      The undersigned hereby appoints Sheldon A. Buckler, Franklin M. Hundley
and William G. Poist, and each or any of them, with power of substitution, as
proxies to attend the Annual Meeting of Shareholders of the System to be held
on Thursday, May 7, 1998 and at any adjournment thereof and to vote the number
of shares which the shareholder(s) would be entitled to vote if personally
present:

      To vote your shares for all Trustee nominees, mark the "FOR"  box on
item 1. To withhold voting for all nominees, mark the "WITHHELD" box.  If you
do not wish your shares voted "FOR" a particular nominee, mark the "EXCEPTION"
box  and enter name(s) of the exception(s) in the space provided.

_____________________________________________________________________________
               The Trustees recommend a vote "FOR" #1, 2 and #3
1.  Election of Trustees
    Nominees: S. A. Buckler, B. L. Francis, M. C. Ruettgers
    [  ]  FOR     [  ]  WITHHELD   [  ]  EXCEPTION(S)
    EXCEPTION(S): ____________________
2.  Amendment to Declaration of Trust
    [  ]  FOR     [  ]  AGAINST    [  ]  ABSTAIN
3.  Restricted Common Share Plan for Trustees
    [  ]  FOR     [  ]  AGAINST    [  ]  ABSTAIN
_____________________________________________________________________________
                  The Trustees recommend a vote "AGAINST" #4
4.  Shareholder Proposal
    [  ]  FOR     [  ]  AGAINST    [  ]  ABSTAIN
_____________________________________________________________________________
5.  Upon any other business that may properly come before the meeting.
_____________________________________________________________________________
      This Proxy will be voted as directed above.  If no other indication
         is made, this proxy will be voted FOR proposals #1, 2 AND 3,
                           and AGAINST proposal #4.
           Any proxy or proxies to vote such shares at said meeting
          heretofore given by the shareholder(s) are hereby revoked.
                     PLEASE SIGN AND DATE ON REVERSE SIDE





                        ____________________________________________________

                        ____________________________________________________
                        Signature(s) should agree with name(s) printed below

       (When signing as attorney, executor or administrator, trustee or
           guardian, etc., please indicate your full title as such.)

Acct. No.                                                   No. of Shares





Dated_______________________, 1998

           PLEASE SIGN, DATE AND RETURN IN ENCLOSED PREPAID ENVELOPE



<TABLE> <S> <C>

<ARTICLE> UT
<LEGEND>
This schedule contains summary financial information extracted from the
balance sheet, statement of income and statement of cash flows contained in
Form 10-K of Commonwealth Energy System for the fiscal year ended December 31,
1997 and is qualified in its entirety by reference to such financial
statements.
</LEGEND>
<CIK> 0000071304
<NAME> COMMONWEALTH ENERGY SYSTEM
<MULTIPLIER> 1,000
       
<S>                            <C>
<FISCAL-YEAR-END>              DEC-31-1997
<PERIOD-END>                   DEC-31-1997
<PERIOD-TYPE>                         YEAR
<BOOK-VALUE>                      PER-BOOK
<TOTAL-NET-UTILITY-PLANT>        1,049,908
<OTHER-PROPERTY-AND-INVEST>         13,767
<TOTAL-CURRENT-ASSETS>             212,986
<TOTAL-DEFERRED-CHARGES>           208,389
<OTHER-ASSETS>                           0
<TOTAL-ASSETS>                   1,485,050
<COMMON>                            43,063
<CAPITAL-SURPLUS-PAID-IN>          111,912
<RETAINED-EARNINGS>                275,795
<TOTAL-COMMON-STOCKHOLDERS-EQ>     430,770
               12,200
                              0
<LONG-TERM-DEBT-NET>               364,311
<SHORT-TERM-NOTES>                       0
<LONG-TERM-NOTES-PAYABLE>           94,075
<COMMERCIAL-PAPER-OBLIGATIONS>           0
<LONG-TERM-DEBT-CURRENT-PORT>       26,653
              820
<CAPITAL-LEASE-OBLIGATIONS>         12,272
<LEASES-CURRENT>                     1,229
<OTHER-ITEMS-CAPITAL-AND-LIAB>     542,720
<TOT-CAPITALIZATION-AND-LIAB>    1,485,050
<GROSS-OPERATING-REVENUE>        1,041,744
<INCOME-TAX-EXPENSE>                31,040
<OTHER-OPERATING-EXPENSES>         923,054
<TOTAL-OPERATING-EXPENSES>         954,094
<OPERATING-INCOME-LOSS>             87,650
<OTHER-INCOME-NET>                   2,601
<INCOME-BEFORE-INTEREST-EXPEN>      90,251
<TOTAL-INTEREST-EXPENSE>            40,350
<NET-INCOME>                        49,901
            988
<EARNINGS-AVAILABLE-FOR-COMM>       48,913
<COMMON-STOCK-DIVIDENDS>            34,068
<TOTAL-INTEREST-ON-BONDS>           33,572
<CASH-FLOW-OPERATIONS>             107,551
<EPS-PRIMARY>                         2.27
<EPS-DILUTED>                         2.27
        


</TABLE>


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