BOSTON EDISON CO
424B2, 1995-09-27
ELECTRIC SERVICES
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<PAGE>
                                                               Filed Pursuant to
                                                               Rule 424(b)(2)
                                                               File No. 33-57840

PROSPECTUS SUPPLEMENT
TO PROSPECTUS DATED FEBRUARY 12, 1993
AS AMENDED MARCH 5, 1993

                                1,000,000 SHARES

                             BOSTON EDISON COMPANY

                                  COMMON STOCK
                               ($1.00 PAR VALUE)

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

    The  Company's  Common Stock  is listed  on  the New  York and  Boston Stock
Exchanges under the symbol "BSE". The last reported sale price of the  Company's
Common Stock on September 26, 1995 on the New York Stock Exchange composite tape
was  $26.875  per  share. See  "Recent  Dividends and  Stock  Price Information"
herein.

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

THESE SECURITIES HAVE NOT BEEN APPROVED  OR DISAPPROVED BY THE SECURITIES  AND
  EXCHANGE  COMMISSION  OR  ANY  STATE  SECURITIES  COMMISSION  NOR  HAS THE
    SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES  COMMISSION
      PASSED  UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS SUPPLEMENT
       OR THE PROSPECTUS TO WHICH  IT RELATES. ANY REPRESENTATION  TO
                      THE CONTRARY IS A CRIMINAL OFFENSE.

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

    The  shares of Common Stock offered  hereby (the "Shares") will be purchased
from the Company by  Merrill Lynch, Pierce, Fenner  & Smith Incorporated as  the
Underwriter  at a price of $26.05  per share (resulting in $26,050,000 aggregate
net proceeds (before  expenses) to the  Company). The Company  will pay  certain
expenses of the offering estimated at approximately $175,000.

    The  Shares may be  offered by the Underwriter  from time to  time in one or
more transactions (which may involve block  transactions) on the New York  Stock
Exchange  or on other national securities exchanges on which the Common Stock is
traded, in  the  over-the-counter  market, through  negotiated  transactions  or
otherwise  at market  prices prevailing  at the  time of  the sale  or at prices
otherwise negotiated, subject to  prior sale, when, as  and if delivered to  and
accepted by the Underwriter. See "Plan of Distribution" herein.

    The  Company  has  agreed  to  indemnify  the  Underwriter  against  certain
liabilities, including liabilities under the Securities Act of 1933, as amended.

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

    The Shares are offered, subject to prior  sale, when, as and if accepted  by
the  Underwriter. It is expected  that the Shares will  be ready for delivery in
New York, New York on or about September 29, 1995.

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

                              MERRILL LYNCH & CO.

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

         The date of this Prospectus Supplement is September 26, 1995.
<PAGE>
                  RECENT DIVIDENDS AND STOCK PRICE INFORMATION

    The  Company's Common Stock is listed on the New York Stock Exchange and the
Boston Stock Exchange. The high and low sales prices of the Common Stock on  the
New York Stock Exchange composite tape as reported in the Eastern Edition of THE
WALL STREET JOURNAL, and the dividends paid, have been as follows:

<TABLE>
<CAPTION>
                                                          PRICE
                                                      --------------  DIVIDENDS
                        YEAR                           HIGH    LOW      PAID
                         ---                          ------  ------  ---------
 <S>                                                  <C>     <C>     <C>
 1993
   First Quarter....................................  30 1/2  26 3/8     .425
   Second Quarter...................................  30 7/8  27 7/8     .425
   Third Quarter....................................  32 5/8  29 3/4     .425
   Fourth Quarter...................................  32 1/4  27 7/8     .425
 1994
   First Quarter....................................  29 7/8      26     .440
   Second Quarter...................................  29 1/8  25 1/4     .440
   Third Quarter....................................  27 5/8  22 3/4     .440
   Fourth Quarter...................................  24 1/4  21 1/2     .440
 1995
   First Quarter....................................  25 1/2  23 1/8     .455
   Second Quarter...................................      27  23 3/8     .455
   Third Quarter....................................      27  24 1/2     .455
   (through September 26, 1995)
</TABLE>

    See "Dividends and Stock Price Information" in the accompanying Prospectus.

    The  last reported  sale price  of the  Common Stock  on the  New York Stock
Exchange composite tape on September 26, 1995 was $26.875 per share. At June 30,
1995, the book value of the Company's Common Stock was $20.17 per share.

                                USE OF PROCEEDS

    The Company will use the  net proceeds from the sale  of the Shares for  the
payment  of obligations incurred under bank lines of credit and commercial paper
for capital  expenditures  for extensions,  additions  and improvements  to  the
Company's  plant and properties. As of September  26, 1995, such lines of credit
and commercial  paper  had a  weighted  average interest  rate  of 5.88%  and  a
weighted average maturity of 15 days.

                              RECENT DEVELOPMENTS

CORPORATE RESTRUCTURING

    In  July 1995,  the Company announced  a corporate  reorganization into four
separate business units effective November 1, 1995: a customer division,  fossil
generating  division,  nuclear  generating  division  and  a  corporate services
division. As  part of  the reorganization,  the Company  intends to  reduce  its
workforce  by  approximately 450  employees by  the  end of  1996. Part  of this
reduction  will  be  achieved  through  a  voluntary  retirement  incentive.  In
September  1995, the Company  announced a voluntary  enhanced retirement program
which will be effective in October 1995 for non-union employees who are at least
55 years old with  at least ten  years of service. More  than 200 employees  are
eligible  for  the program,  which  is available  until  November 15,  1995. The
Company is  also  currently negotiating  with  its two  union  locals  regarding
implementing a similar enhanced retirement program for union employees. If these
negotiations  are successful, the  unions are expected  to vote on  a program by
early October  for which  approximately  400 employees  would be  eligible.  The
Company  expects  that  a  majority of  the  eligible  non-union  employees will
participate in  the enhanced  retirement program,  as would  a majority  of  the
eligible union employees if a similar plan were implemented. The Company expects
to  incur  a one-time  charge  to fourth  quarter earnings  as  a result  of the
program; the charge will  be determined by the  number of employees that  accept
the offer.

                                      S-2
<PAGE>
    Approximately 70 of the Company's upper- and middle-management positions and
related  administrative support positions will be  eliminated by the end of 1995
regardless of  the  results  of  the  enhanced  retirement  program.  A  special
severance  program  was  announced  for these  affected  employees  who  are not
eligible for or do not accept the enhanced retirement program, which will result
in a one-time, pre-tax charge to third quarter earnings of $7 million.  Assuming
the  union agrees to implement the enhanced retirement program, the total of the
$7 million third  quarter pre-tax  charge and the  fourth quarter  charge to  be
incurred  from the enhanced  retirement program (based  on the Company's current
estimate of  union  and non-union  employee  participation in  the  program)  is
estimated  to be approximately $25 million  (pre-tax). Depending on the level of
participation, the charge  could be higher  or lower. The  Company is  currently
evaluating  its options in order to achieve  the 450 employee reduction if it is
not achieved  through the  enhanced retirement  program and  the management  and
administrative  support reduction. The Company  anticipates ongoing savings as a
result of the reorganization.

INDUSTRY RESTRUCTURING

    On August 16, 1995, the  Massachusetts Department of Public Utilities  (DPU)
issued  an order  on restructuring of  the electric utility  industry. The order
provides  for  Massachusetts-based  electric  utilities  to  restructure   their
operations  to permit more competition for customers. It includes principles for
a restructured  electric  industry that  consists  of customer  choice  and  the
benefits  of  competition  for  all customers;  full  competition  in generation
markets;  functionally  separate   generation,  transmission  and   distribution
services;  universal service;  support for  environmental regulation  goals; and
incentive regulation for the transmission and distribution of electricity, which
remain monopoly  services. The  DPU's order  also set  principles to  guide  the
transition  from a regulated to a competitive industry structure: honor existing
commitments; unbundle  rates  for generation,  transmission,  and  distribution;
reduce  rates in  the near term;  maintain demand-side  management programs; and
ensure an orderly and quick  transition which minimizes customer confusion.  The
order  allows a  reasonable opportunity for  the recovery  of net, non-mitigable
potentially strandable costs, over  a period of five  to ten years. These  costs
include  investments in  plant that  might not  be recoverable  in a competitive
market, liabilities for future decommissioning of nuclear plants, the amounts by
which  certain  purchase  power  contracts  exceed  the  competitive  price  for
generation  and prudently incurred regulatory assets. The procedure and criteria
for recovering potentially strandable costs is uncertain, and the extent of  the
Company's  ability to recover all or part of its potentially strandable costs is
unknown at this time.

    The order  established  only general  principles  for the  transition  to  a
competitive market and did not establish a particular model for the new industry
structure. The order requires each of the Massachusetts-based electric utilities
to  develop a plan for moving toward competition consistent with the DPU's order
and encourages utilities to  negotiate with all  interested parties while  doing
so.  The Company is one of three companies required to file a restructuring plan
by February 16, 1996.

                              PLAN OF DISTRIBUTION

    Subject to the terms and conditions set forth in the Purchase Agreement, the
Company has agreed to sell, and the Underwriter has agreed to purchase from  the
Company, 1,000,000 shares of Common Stock. Under the terms and conditions of the
Purchase  Agreement, the Underwriter is committed to take and pay for all of the
Shares, if any are taken.

    It is expected that all or a  substantial portion of the Shares may be  sold
by  the  Underwriter to  institutional purchasers  in  one or  more transactions
(which may involve  block transactions)  on the New  York Stock  Exchange or  on
other  national  securities exchanges  on which  the Common  Stock is  traded or
otherwise. The distribution of the Shares may also be effected from time to time
in special  offerings,  exchange distributions  and/or  secondary  distributions
pursuant  to and in accordance with the rules  of the New York Stock Exchange or
such other exchanges, in the over-the-counter market, in negotiated transactions
through the writing of options on the Shares (whether such options are listed on
an options exchange  or otherwise)  or otherwise, or  in a  combination of  such
methods at prevailing market prices or at negotiated prices. The Underwriter may
effect  such  transactions by  selling Shares  to or  through dealers,  and such

                                      S-3
<PAGE>
dealers may  receive  compensation in  the  form of  discounts,  concessions  or
commissions  from the Underwriter and/or the  purchasers of such Shares for whom
they may act as agents or to whom they may sell as principal.

    In connection with  the sale  of the  Shares, the  Underwriter will  receive
compensation   in  the  form  of  commissions   or  discounts  and  may  receive
compensation from purchasers of the  Shares for whom it may  act as agent or  to
whom  it may sell as principal in the  form of commissions or discounts, in each
case in  amounts  which  will  not  exceed  those  customary  in  the  types  of
transactions   involved.  Underwriters  and  dealers  that  participate  in  the
distribution of the Shares may be  deemed to be underwriters, and any  discounts
received  by them from the Company and  any compensation received by them on the
resale of the  Shares by them  may be  deemed to be  underwriting discounts  and
commissions under the Securities Act of 1933, as amended (the "Act").

    The  Company has agreed not  to offer or sell,  or announce the offering of,
any shares of  Common Stock  for a  period of  90 days  after the  date of  this
Prospectus  Supplement  (with  certain  exceptions)  without  the  prior written
consent of the Underwriter.

    The  Company  has  agreed  to  indemnify  the  Underwriter  against  certain
liabilities, including liabilities under the Act.

                                 LEGAL OPINIONS

    The  validity of the Shares  will be passed upon for  the Company by Ropes &
Gray, One International Place, Boston,  Massachusetts, counsel for the  Company,
and  for the  Underwriter by  Choate, Hall &  Stewart, Exchange  Place, 53 State
Street, Boston, Massachusetts,  counsel for the  Underwriter. Thomas G.  Dignan,
Jr., a partner of Ropes & Gray, is a Director of the Company.

                                    EXPERTS

    The  consolidated balance sheets of the Company  as of December 31, 1994 and
1993 and  the consolidated  statements of  income, retained  earnings, and  cash
flows  for each of the  three years in the period  ended December 31, 1994, have
been incorporated by  reference herein in  reliance on the  report of Coopers  &
Lybrand  L.L.P., independent accountants, given on the authority of that firm as
experts in accounting and auditing.

    With respect to the unaudited interim consolidated financial information for
the periods ended March 31 and June 30, 1995 and 1994, incorporated by reference
herein, Coopers & Lybrand  L.L.P. have reported that  they have applied  limited
procedures  in  accordance  with professional  standards  for a  review  of such
information. However, their separate reports included in the Company's Quarterly
Reports on Form 10-Q for  the quarters ended March 31,  1995 and June 30,  1995,
and  incorporated by reference herein, state that they did not audit and they do
not express  an  opinion on  that  interim consolidated  financial  information.
Accordingly,  the degree of reliance on their reports on such information should
be restricted in light of the  limited nature of the review procedures  applied.
Coopers  & Lybrand L.L.P. are not subject to the liability provisions of Section
11 of the Act for their reports on the unaudited interim consolidated  financial
information  because  such  reports  are  not  "reports",  or  a  "part"  of the
registration statement prepared or certified by Coopers & Lybrand L.L.P.  within
the meaning of Sections 7 and 11 of the Act.

                                      S-4
<PAGE>
                                 $1,100,000,000
                             BOSTON EDISON COMPANY
                DEBT SECURITIES, CUMULATIVE PREFERRED STOCK AND
                                  COMMON STOCK
                            ------------------------

    Boston  Edison Company (the "Company") may from  time to time offer (i) Debt
Securities (the "New Debt Securities") consisting of unsecured debentures, notes
and/or other evidences of  indebtedness, in one or  more series, (ii) shares  of
its  Cumulative Preferred Stock, $100 par  value (the "New Preferred Stock"), in
one or more series,  and/or (iii) shares  of its Common  Stock, $1.00 par  value
(the  "Common  Stock"), at  an aggregate  initial offering  price not  to exceed
$1,100,000,000 at prices and on terms to  be determined at the time or times  of
sale.  One  or more  series of  the New  Preferred Stock  may be  represented by
Depositary Shares  evidenced by  Depositary  Receipts ("Depositary  Shares")  as
described  herein.  The New  Debt  Securities, New  Preferred  Stock, Depositary
Shares and Common Stock are referred to herein collectively as the "Securities".

    For  each  offering  of  Securities  for  which  this  Prospectus  is  being
delivered,   there  will  be  an  accompanying  Prospectus  Supplement  (each  a
Prospectus  Supplement)  that  sets  forth  the  specific  series   designation,
aggregate  principal amount, maturity or maturities, rate or rates (or manner of
calculation thereof) and times of payment of interest, redemption terms and  any
other special terms of the New Debt Securities, if any, in respect of which this
Prospectus  is  being  delivered;  the specific  series  designation,  number of
shares,  dividend  rate,  redemption  terms,  sinking  fund  or  purchase   fund
provisions,  if any, and any other special  terms of the New Preferred Stock, if
any, in respect of which this Prospectus  is being delivered; and the number  of
shares  and the specific terms  of the offering thereof  of the Common Stock, if
any, in respect of which this Prospectus is being delivered.

    The Company's  Common Stock  is listed  on  the New  York and  Boston  Stock
Exchanges under the symbol "BSE." See "Dividends and Stock Price Information."

    The  Securities  may  be sold  directly  by  the Company  or  through agents
designated from time to time  or through underwriters or  dealers or a group  of
underwriters  represented  by one  or more  underwriters. If  any agents  of the
Company or  any underwriters  are involved  in  any sale  of the  Securities  in
respect of which this Prospectus is being delivered, the names of such agents or
underwriters,  the initial public offering  price, any applicable commissions or
discounts and the net proceeds to the  Company from such sale will be set  forth
in  a Prospectus Supplement. See  "Description of Debt Securities", "Description
of Cumulative Preferred  Stock", "Description  of Capital Stock",  and "Plan  of
Distribution" herein.
                            ------------------------

THESE  SECURITIES HAVE NOT BEEN APPROVED  OR DISAPPROVED BY THE SECURITIES AND
  EXCHANGE COMMISSION  OR BY  ANY STATE  SECURITIES COMMISSION  NOR HAS  THE
    SECURITIES  AND  EXCHANGE  COMMISSION OR  ANY  STATE  SECURITIES COMMIS-
      SION PASSED  UPON  THE  ACCURACY OR  ADEQUACY  OF  THIS  PROSPECTUS.
           ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
                            ------------------------

                The date of this Prospectus is February 12, 1993
                           as amended March 5, 1993.
<PAGE>
                             AVAILABLE INFORMATION

    Boston  Edison  Company  (the  "Company") is  subject  to  the informational
requirements of the Securities Exchange Act  of 1934, as amended (the  "Exchange
Act"),  and in  accordance therewith files  reports, proxy  statements and other
information with the Securities and Exchange Commission (the "Commission"). Such
reports, proxy statements and other information filed with the Commission can be
inspected and  copied  at the  public  reference facilities  maintained  by  the
Commission  at 450 Fifth Street, N.W., Washington, D.C., and at the Commission's
regional offices  at Northwest  Atrium Center,  500 West  Madison Street,  Suite
1400,  Chicago, Illinois 60661; and Room 1228, 75 Park Place, New York, New York
10007; and copies of such material can also be obtained at prescribed rates from
the Public Reference Section  of the Commission at  its principal office at  450
Fifth  Street, N.W., Washington,  D.C. 20549. Certain  securities of the Company
are listed on  the New  York and Boston  Stock Exchanges,  where reports,  proxy
statements and other information concerning the Company can also be inspected.

    The  Company has filed with the  Commission a registration statement on Form
S-3 (herein,  together with  all amendments  and exhibits,  referred to  as  the
"Registration  Statement") under  the Securities Act  of 1933,  as amended, with
respect to the Securities offered hereby.  This Prospectus does not contain  all
of  the information  set forth in  the Registration Statement,  certain parts of
which  are  omitted  in  accordance  with  the  rules  and  regulations  of  the
Commission.   For  further  information,   reference  is  hereby   made  to  the
Registration Statement.
                            ------------------------

                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

    The following documents filed with the Commission (File No. 1-2301) pursuant
to the Exchange Act are incorporated herein by reference:

        1.  The Company's Annual Report on Form 10-K for the year ended December
    31, 1991, as amended by Form 8 dated June 26, 1992;

        2.  The Company's Quarterly Reports on Form 10-Q for the quarters  ended
    March 31, June 30, and September 30, 1992;

        3.   The Company's Current Reports on  Form 8-K dated September 3, 1992,
    January 28, 1993, and February 11, 1993; and

        4.  All other documents filed by the Company pursuant to Sections 13, 14
    or 15(d) of the Exchange Act subsequent  to the date of this Prospectus  and
    prior to the termination of the offering of the Securities offered hereby.

    Any statement contained in a document incorporated by reference herein shall
be  deemed to be modified  or superseded for purposes  of this Prospectus to the
extent that a  statement contained  herein or  in any  other subsequently  filed
document  which also is incorporated by  reference herein modifies or supersedes
such statement.  Any such  statement  so modified  or  superseded shall  not  be
deemed,  except  as so  modified or  superseded,  to constitute  a part  of this
Prospectus.

    The Company  hereby undertakes  to provide  without charge  to each  person,
including  any beneficial  owner, to  whom a  copy of  this Prospectus  has been
delivered, on the written or oral request of  any such person, a copy of any  or
all  of the documents  incorporated herein by reference,  other than exhibits to
such documents unless specifically incorporated by reference in such  documents.
Requests  for such  copies should be  directed to Theodora  S. Convisser, Clerk,
Boston  Edison  Company,  800  Boylston  Street,  Boston,  Massachusetts  02199,
telephone: (617) 424-2000.

                                       2
<PAGE>
                                  THE COMPANY

    The  Company is  an investor-owned regulated  public utility  engaged in the
energy and energy  services business, which  includes the generation,  purchase,
transmission,  distribution and sale of electric  energy. It was incorporated in
1886 under  the  laws  of  The  Commonwealth  of  Massachusetts.  Its  principal
executive  offices  are located  at 800  Boylston Street,  Boston, Massachusetts
02199, and its main telephone number is (617) 424-2000.

    The Company supplies electricity at retail  to an area of approximately  590
square  miles within 30 miles of Boston, Massachusetts, encompassing the City of
Boston and 39  surrounding cities  and towns.  The population  of the  territory
served  with electricity at  retail is approximately  1,500,000. At December 31,
1992, the  Company  served approximately  650,000  customers. The  Company  also
supplies  electricity at wholesale  for resale to  other utilities and municipal
electric departments. Through  Harbor Electric  Energy Company,  a wholly  owned
subsidiary, the Company provides distribution service to the Massachusetts Water
Resource  Authority's wastewater  treatment facility  on Deer  Island in Boston,
Massachusetts.

    For the year ending  December 31, 1992, approximately  85% of the  Company's
revenues  were derived from  retail electric sales,  13% from wholesale electric
sales and  2%  from other  sources.  Sources of  installed  electric  generation
capability in 1992 were 81% fossil and 19% nuclear.

                                USE OF PROCEEDS

    The Company may use the net proceeds from the sale of the Securities offered
hereby  for  any or  all  of the  following  purposes: (i)  for  the redemption,
repurchase or payment  at maturity of  any or all  of the following  outstanding
securities  of the  Company: $25,000,000  outstanding principal  amount of First
Mortgage Bonds, Series  I, 4  3/4% due 1995;  $40,000,000 outstanding  principal
amount  of  First  Mortgage  Bonds,  Series  J,  6  1/8%  due  1997; $50,000,000
outstanding principal amount of First Mortgage Bonds, Series K, 6 7/8% due 1998;
$50,000,000 outstanding principal amount of  First Mortgage Bonds, Series L,  9%
due  1999;  $60,000,000 outstanding  principal amount  of First  Mortgage Bonds,
Series M, 9  3/8% due 2000;  $75,000,000 outstanding principal  amount of  First
Mortgage  Bonds, Series  N, 8 1/8%  due 2001;  $60,000,000 outstanding principal
amount of  First  Mortgage  Bonds,  Series  P,  9  1/4%  due  2007;  $59,375,000
outstanding principal amount of First Mortgage Bonds, Series Q, 9 3/4% due 2003;
$44,250,000  outstanding  principal amount  of First  Mortgage Bonds,  Series R,
10.95% due  2004; $25,000,000  outstanding principal  amount of  First  Mortgage
Bonds,   Series  S,  variable  rate   (currently  9.2%)  due  2002;  $15,000,000
outstanding principal amount of Collateralized Pollution Control Revenue  Bonds,
1984  Series A (10.25%)  due 2014; $135,000,000  outstanding principal amount of
First Mortgage  Bonds,  Series  W,  9 1/2%  due  2016;  $50,000,000  outstanding
principal  amount of Series A Medium Term  Notes, 9.75% due 1994; and/or 400,000
outstanding shares of the Company's Cumulative Preferred Stock, 8.88% Series, or
for the payment of obligations of  the Company incurred for such redemptions  or
payments;  (ii)  for the  payment  of obligations  of  the Company  incurred for
capital expenditures for extensions, additions and improvements to the Company's
plant and properties or for the  payment of obligations of the Company  incurred
for  such purposes;  (iii) to make  certain required and  voluntary sinking fund
payments in respect of the Company's issued and outstanding First Mortgage Bonds
and Cumulative Preferred Stock; and/or (iv) for the repayment of short-term debt
balances. As of January 29, 1993,  such short-term debt balances had a  weighted
average interest rate of 3.36% and a weighted average maturity of 21 days.

                                       3
<PAGE>
                        PLANT EXPENDITURES AND FINANCING

    The  Company's current  estimate of plant  expenditures for  the period 1993
through  1996,  which  is  subject  to  continuing  review  and  adjustment,  is
approximately   $790,000,000  (excluding   allowances  for   funds  used  during
construction and  $64,000,000  in  nuclear  fuel  expenditures).  A  significant
portion   of  such  expenditures  relate   to  the  Company's  transmission  and
distribution system.  Funds  generated  internally  (excluding  the  effects  of
certain   settlement  agreements  between  the  Company  and  the  Massachusetts
Department of  Public  Utilities  in  1989 and  the  Federal  Energy  Regulatory
Commission  in  1990)  represented  approximately  90%,  89%  and  73%  of plant
expenditures in 1992, 1991 and 1990, respectively. It is expected that a portion
of future plant expenditures will be  funded internally. It is anticipated  that
the  balance of the Company's plant  expenditures, long-term debt maturities and
sinking fund requirements (the latter two items aggregating $213,535,000 for the
period 1993 through 1996), will be financed  by the issuance of debt and  equity
securities, including the Securities.

                  RATIO OF EARNINGS TO FIXED CHARGES AND RATIO
             OF EARNINGS TO FIXED CHARGES AND PREFERRED DIVIDENDS*

<TABLE>
<CAPTION>
                                                    YEARS ENDED DECEMBER 31,
                                              -------------------------------------
                                              1992    1991    1990    1989    1988
                                              -----   -----   -----   -----   -----
 <S>                                          <C>     <C>     <C>     <C>     <C>
 Ratio of Earnings to Fixed Charges.........   1.93x   1.86x   1.91x   0.52x   2.08x
 Ratio of Earnings to Fixed Charges and
  Preferred Dividends.......................   1.71x   1.71x   1.73x   0.47x   1.86x
</TABLE>

    Earnings  have been computed by adding the  amount of income taxes and fixed
charges to net  income. Fixed  charges include  gross interest  expense and  the
estimated  interest component  of rentals. The  Company reported a  loss for the
year ended December 31, 1989, primarily as a result of a charge of  $178,650,000
reflecting the settlement of certain regulatory and legal proceedings. Excluding
the effects of such charge, the Ratio of Earnings to Fixed Charges and the Ratio
of  Earnings to Fixed Charges  and Preferred Dividends for  1989 would have been
2.06x and  1.86x,  respectively.  The  Company would  have  needed  to  generate
additional  pre-tax income  of $55,708,000 and  $68,183,000, to  cover its fixed
charges  of  $116,445,000   and  fixed  charges   and  preferred  dividends   of
$128,921,000, respectively, in 1989.
- ------------------------
*No shares of the Company's Preference Stock are currently outstanding, although
 shares  of Preference Stock were outstanding  during each of the periods listed
 above. The Ratio  of Earnings  to Fixed  Charges and  Preferred and  Preference
 Dividends  for each of the years ended  December 31, 1992, 1991, 1990, 1989 and
 1988 were 1.69x, 1.60x, 1.59x, 0.43x and 1.76x, respectively. The Company would
 have needed to generate additional pre-tax  income of $79,784,000 to cover  its
 fixed charges and preferred and preference dividends of $140,522,000 in 1989.

                                       4
<PAGE>
                     DIVIDENDS AND STOCK PRICE INFORMATION

    The  Company's Common Stock is listed on the New York Stock Exchange and the
Boston Stock Exchange. The high and low sales prices of the Common Stock on  the
New York Stock Exchange composite tape as reported in the Eastern Edition of THE
WALL STREET JOURNAL, and the dividends paid, have been as follows:

<TABLE>
<CAPTION>
                                                          PRICE
                                                      --------------  DIVIDENDS
 YEAR                                                  HIGH    LOW      PAID
 ---------------------------------------------------  ------  ------  ---------
 <S>                                                  <C>     <C>     <C>
 1991
   First Quarter....................................  $20 1/2 $18 1/4   $.395
   Second Quarter...................................  20 5/8  19 1/8     .395
   Third Quarter....................................  21 3/4  18 3/4     .395
   Fourth Quarter...................................  24 7/8  21 1/4     .395
 1992
   First Quarter....................................  $24 5/8 $22 1/8   $.41
   Second Quarter...................................      26  22 3/8     .41
   Third Quarter....................................  26 7/8  24 7/8     .41
   Fourth Quarter...................................  28 1/4  24 3/4     .41
 1993
   First Quarter....................................  $28 3/8 $26 3/8   $.425
   (through February 1, 1993)
</TABLE>

    The Company customarily pays dividends on its Common Stock on the first days
of February, May, August and November, to shareholders of record as of the tenth
day  of the preceding month.  Cash dividends have been  paid on the Common Stock
each year since 1890.  Future dividends are subject  to factors that  ordinarily
affect dividend policy, such as earnings, timely and adequate rate increases and
other regulatory action affecting the Company.

    The  reported last  sale price  of the  Common Stock  on the  New York Stock
Exchange composite tape on February 1, 1993  was $28 1/8 per share. At  December
31, 1992, the book value of the Company's Common Stock was $18.71 per share.

                         DESCRIPTION OF DEBT SECURITIES

GENERAL

    The  New Debt  Securities will  be issued  under the  Indenture dated  as of
September 1, 1988  between the Company  and Bank of  Montreal Trust Company,  as
Trustee (the "Trustee"), as supplemented and modified by indentures supplemental
thereto  (the "Indenture"). The  debt securities of all  series issued, or which
may be issued,  under the  Indenture are hereinafter  referred to  as the  "Debt
Securities".  Capitalized terms used in this  section of the Prospectus entitled
"Description of Debt Securities"  and not otherwise  defined in this  Prospectus
shall have the respective meanings ascribed to them in the Indenture.

    The  description  set forth  below  of certain  provisions  of the  New Debt
Securities, the  Debt  Securities and  the  Indenture  does not  purport  to  be
complete  and is subject to, and qualified  in its entirety by reference to, the
instruments constituting the Indenture  which are filed  with the Commission  as
exhibits to the Registration Statement of which this Prospectus is a part.

    The  Indenture provides that, in addition to any New Debt Securities offered
hereby, additional debt securities (including both interest bearing and original
issue discount securities  in both  registered and  bearer form)  may be  issued
thereunder,  without  limitation  as  to  the  aggregate  principal  amount. The
Indenture does not limit the amount  of other debt, secured or unsecured,  which
may  be issued  by the  Company. As  of December  31, 1992,  the Company  had an
aggregate of $435,000,000 principal amount of Debt Securities outstanding  under
the  Indenture,  consisting of  five series.  On February  2, 1993,  the Company
issued and sold $65,000,000 principal amount of 6.80% Debentures Due February 1,
2000 under the  Indenture. The Debt  Securities are unsecured  and rank  equally
with the Company's other unsecured indebtedness. Substantially

                                       5
<PAGE>
all  franchises  and property  of the  Company are  subject to  the lien  of the
Indenture of  Trust  and  First  Mortgage  dated as  of  December  1,  1940,  as
supplemented  and amended,  between the  Company and  State Street  Bank & Trust
Company, as Trustee (the "First Mortgage  Indenture"). As of December 31,  1992,
the  Company had  outstanding $638,625,000  aggregate principal  amount of First
Mortgage Bonds under the First Mortgage Indenture.

    The Indenture provides that Debt Securities may be issued at various  times,
may  have differing  stated maturity  dates and  may bear  interest at differing
rates. Unless otherwise indicated in  a Prospectus Supplement relating  thereto,
the  New Debt Securities will  be issued only in  fully registered form, without
coupons, in denominations of $1,000 or any multiple thereof, will be  registered
for transfer or exchange, and principal and interest, if any, will be payable at
the  Corporate Trust  Office of the  Trustee in the  City of New  York, 77 Water
Street, New  York, New  York  10005. No  service charge  will  be made  for  any
transfer or exchange of the Debt Securities, but the Company may require payment
of  a sum  sufficient to  cover any  tax or  other government  charge payable in
connection therewith.

    Unless otherwise indicated in a  Prospectus Supplement relating to a  series
of  New Debt Securities (the "Offered Debt Securities"), there are no provisions
in the Indenture that require  the Company to redeem,  or permit the holders  to
cause  a redemption of,  the New Debt  Securities or that  otherwise protect the
holders  in  the   event  that   the  Company   incurs  substantial   additional
indebtedness,  whether or  not in  connection with  a change  in control  of the
Company.

    Certain other terms and provisions of the New Debt Securities, including the
maturity, rate of  interest, interest payment  dates, redemption provisions  and
whether  any of the Debt Securities are to be issuable in permanent global form,
will be  described  in  a  Prospectus  Supplement  relating  to  such  New  Debt
Securities.

EVENTS OF DEFAULT

    The  following constitute Events of Default under the Indenture with respect
to Debt Securities of any series: (1) default in the payment of principal of any
Debt Security when  due and the  continuation of  such default for  a period  of
three  Business Days thereafter; (2)  default in the payment  of interest on any
Debt Security when due and the continuation thereof for a period of 30 days; (3)
default in the payment of any sinking fund payment when due by the terms of  the
Debt  Securities of the series; (4) default  in the performance or breach of any
covenant or warranty of the Company in  the Indenture (other than a covenant  or
warranty  included in the Indenture solely for the benefit of one or more series
of Debt Securities other than the Offered Debt Securities), and the continuation
thereof for 60  days after  written notice  to the  Company as  provided in  the
Indenture;  (5)  default  in  the  payment  of  principal  or  interest  on,  or
acceleration of, securities of  any other series issued  under the Indenture  or
any other mortgage, indenture or instrument or other evidence of indebtedness of
the  Company for borrowed  money, in an  aggregate amount exceeding $10,000,000,
which default  is  not cured  or  acceleration  not rescinded  or  annulled,  or
indebtedness  not discharged, within 90 days after written notice to the Company
as provided in the  Indenture; (6) certain events  of bankruptcy, insolvency  or
reorganization; and (7) any other Event of Default provided with respect to Debt
Securities of a particular series.

    If  an Event of  Default with respect  to the Debt  Securities occurs and is
continuing, either  the Trustee  or the  Holders of  at least  33% in  aggregate
principal  amount of the  outstanding Debt Securities  may declare the principal
amount of all Debt  Securities to be  due and payable  immediately. At any  time
after  the declaration of  acceleration with respect to  the Debt Securities has
been made,  but before  a judgment  or  decree based  on acceleration  has  been
obtained,  the Holders of a majority in principal amount of the outstanding Debt
Securities  may,   under  certain   circumstances,   rescind  and   annul   such
acceleration.

    The  Indenture  provides that,  subject to  the duty  of the  Trustee during
default to act with the required standard of care, the Trustee will be under  no
obligation   to   exercise   any   of   its   rights   or   powers   under   the

                                       6
<PAGE>
Indenture  at the request or direction of  any of the Holders of the outstanding
Debt  Securities,  unless  such  Holders  shall  have  offered  to  the  Trustee
reasonable  indemnity. Subject to such provisions for the indemnification of the
Trustee, the  Holders  of  33%  in principal  amount  of  the  outstanding  Debt
Securities  will  have  the  right  to direct  the  time,  method  and  place of
conducting any proceeding for any remedy available to the Trustee, or exercising
any trust  or  power  conferred  on  the  Trustee,  with  respect  to  the  Debt
Securities. The right of a Holder of any Debt Security to institute a proceeding
with  respect to the  Indenture is subject to  certain conditions precedent, but
each Holder of  a Debt  Security has  an absolute  right to  receive payment  of
principal and interest when due and to institute suit for the enforcement of any
such  payment. The Indenture provides that the Trustee, within 90 days after the
occurrence of a default with respect to the Debt Securities, is required to give
the Holders  of the  Debt Securities  notice of  such default,  unless cured  or
waived; provided that, except in the case of default in the payment of principal
or  interest on any  Debt Security, the  Trustee may withhold  such notice if it
determines it is in the interest of such Holders to do so.

    The Company will be required to furnish annually to the Trustee a  statement
as  to the performance  by the Company  of certain of  its obligations under the
Indenture and as to default in such performance.

CONSOLIDATION, MERGER, SALE OR CONVEYANCE

    The Indenture provides that the Company may not, without the consent of  the
Holders  of not less than a majority in principal amount (calculated as provided
in the Indenture) of the Outstanding  Securities (as defined in the  Indenture),
consolidate  with or  merge into  any other  corporation or  convey, transfer or
lease its properties and assets substantially as an entirety, unless (i) if  the
Company  is  not the  continuing  corporation, the  successor  corporation shall
assume by a supplemental indenture the Company's obligations under the Indenture
and (ii)  immediately after  giving  effect to  such  transaction, no  Event  of
Default,  and no event which after notice or lapse of time would become an Event
of Default, shall have occurred and be continuing.

MODIFICATION OF THE INDENTURE

    The Indenture contains  provisions permitting the  Company and the  Trustee,
with  the consent of the Holders of not less than a majority in principal amount
(calculated as  provided in  the Indenture)  of the  Outstanding Securities  (as
defined in the Indenture), if all series of Outstanding Securities are affected,
or  the  Holders of  a majority  in  aggregate principal  amount of  each series
affected by such modification, in  case one or more, but  less than all, of  the
series  of Outstanding Securities  are affected, to modify  the Indenture or any
supplemental  indenture  or  the  rights  of  the  Holders  of  the  Outstanding
Securities  of any series; provided that no such modification shall, without the
consent of the Holders of each Outstanding Security affected thereby, change the
maturity of any Outstanding Security, or reduce the principal amount thereof, or
reduce the rate or extend the time of payment of interest thereon, or reduce any
amount payable  upon  redemption of  any  Outstanding Security,  or  reduce  the
overdue  rate thereof or change the currency of payment of principal or interest
on any Outstanding Security or reduce  the above stated percentage in  principal
amount of Outstanding Securities the consent of the Holders of which is required
for  modification  or  amendment  of  the Indenture  or  for  waiver  of certain
defaults, or  change any  obligation of  the Company  to maintain  an office  or
agency in each Place of Payment.

    The  Indenture  also  permits  the  Company and  the  Trustee  to  amend the
Indenture in certain  circumstances without the  consent of the  Holders of  any
Debt  Securities to evidence the merger of the Company or the replacement of the
Trustee and for certain other purposes.

CONCERNING THE TRUSTEE

    Bank of Montreal  Trust Company is  the Trustee and  Paying Agent under  the
Indenture.  The  bank or  one  of its  affiliates has  had  a regular  course of
commercial dealings with  the Company including  participation in its  revolving
credit agreement, and from time to time its working lines of credit.

                                       7
<PAGE>
                   DESCRIPTION OF CUMULATIVE PREFERRED STOCK

GENERAL

    The  description  set forth  below of  certain  provisions of  the Company's
Restated Articles of Organization, as amended,  the laws of The Commonwealth  of
Massachusetts  and  the regulations  of the  Massachusetts Department  of Public
Utilities does not purport to  be complete and is  subject to, and qualified  in
its  entirety by reference to, the  Company's Restated Articles of Organization,
as amended, the laws of The Commonwealth of Massachusetts and the regulations of
the Massachusetts Department of Public Utilities.

    The Cumulative  Preferred Stock  constitutes a  class of  capital stock,  of
which  2,830,000 shares have been authorized, which  may be issued in series and
was created by a vote of the  holders of Common Stock in 1956. See  "Description
of  Capital  Stock".  The  initial  series,  consisting  of  180,000  shares  of
Cumulative Preferred Stock, 4.25% Series, was issued in 1956. The second series,
consisting of 250,000 shares  of Cumulative Preferred  Stock, 4.78% Series,  was
issued  in 1958.  The third series,  consisting of 400,000  shares of Cumulative
Preferred Stock, 8.88% Series, was issued in 1970. The fourth series, consisting
of 500,000 shares of Cumulative Preferred Stock, 7.27% Series, of which  480,000
shares  are  currently  outstanding,  was  issued  in  1987.  The  fifth series,
consisting of  500,000 shares  of  Cumulative Preferred  Stock, 8%  Series,  was
issued  in 1991.  The sixth series,  consisting of 400,000  shares of Cumulative
Preferred Stock, 8 1/4% Series  (evidenced by 1,600,000 depositary shares,  each
representing  a one-fourth  interest in a  share of  Cumulative Preferred Stock,
8 1/4% Series), was  issued in 1992. Each  series of Cumulative Preferred  Stock
may  differ,  as determined  by the  Board  of Directors,  from other  series in
certain respects, the principal differences being as follows: number of  shares,
dividend  rate, the  date of  the first  dividend payment,  the date  from which
dividends will  be cumulative,  redemption prices,  sinking or  purchase  funds,
amounts  payable upon distribution  of assets and  conversion, participation and
other special rights. Holders of Cumulative Preferred Stock are not entitled  to
vote  except in certain circumstances.  See "Description of Cumulative Preferred
Stock -- Voting  Rights." For  further information  relating to  the issued  and
outstanding shares of each series of Cumulative Preferred Stock, see Notes 2 and
3 of Notes to Consolidated Schedules of Capital Stock and Indebtedness contained
in the Company's 1991 Annual Report to Shareholders incorporated by reference in
the Company's Annual Report which is incorporated by reference herein.

    As  set forth  under "Description of  Depositary Shares"  below, the Company
may, at  its option,  elect  to offer  depositary shares  ("Depositary  Shares")
evidenced  by depositary receipts ("Depositary  Receipts"), each such Depositary
Share representing  a  fractional interest  (to  be specified  in  a  Prospectus
Supplement  relating to  a series  of New  Preferred Stock)  in a  share of such
series of the  New Preferred Stock  issued and deposited  with a depositary,  in
lieu  of offering full shares of Cumulative Preferred Stock. Whether the Company
has elected to offer Depositary Shares with respect to a series of New Preferred
Stock will be set forth in a Prospectus Supplement.

DIVIDENDS

    Holders of Cumulative Preferred Stock are  entitled to receive, when and  as
declared  by the  Board of  Directors out  of funds  legally available therefor,
cumulative dividends at the rate fixed for each series, payable quarterly on the
first days  of February,  May, August  and  November in  each year,  before  any
dividends  are paid on the Common Stock or other junior stock. Dividends must be
paid on  all such  shares if  paid on  the shares  of any  series and,  if  full
dividends  are not declared, payments must be made pro rata in proportion to the
rate of dividend fixed for each series.  After payment in full of all  dividends
accrued on Cumulative Preferred Stock, dividends on the Common Stock or any such
junior  stock may be declared and paid  as the Board of Directors may determine.
Dividends on the New Preferred Stock will  be cumulative from the date of  issue
and  payable  at the  rate  per annum  set  forth in  the  Prospectus Supplement
relating to such New Preferred Stock.

REDEMPTION PROVISIONS

    Except as  otherwise set  forth in  the Prospectus  Supplement for  the  New
Preferred  Stock, the Cumulative  Preferred Stock and any  series thereof may be
redeemed as a  whole or  in part  at any  time, by  resolution of  the Board  of
Directors,  upon not less than thirty days' notice, at the applicable redemption
prices therefor plus  dividends accrued to  the redemption date  except that  if
there are any dividend arrearages on any

                                       8
<PAGE>
Cumulative  Preferred Stock  no part less  than all of  the Cumulative Preferred
Stock may be redeemed or purchased. The redemption prices for the New  Preferred
Stock  will  be set  forth in  the  Prospectus Supplement  relating to  such New
Preferred Stock.

LIQUIDATION

    Upon any  liquidation, dissolution  or  winding up  of  the affairs  of  the
Company  or distribution of  capital, the holders  of Cumulative Preferred Stock
are entitled to receive the full distributive amounts fixed for their particular
series,  plus  dividends  accrued  to  the  date  of  distribution,  before  any
distribution  shall be made  to holders of  Common Stock or  other junior stock.
Distributions of assets  on liquidation must  be pro rata  in proportion to  the
amount  fixed for  each series,  if less than  payment in  full is  all that the
available assets will provide.  The distributive amounts  for the New  Preferred
Stock  are  equal  to  the  par value  thereof  per  share  if  the liquidation,
dissolution, winding up or distribution of capital is involuntary and an  amount
equal  to the applicable redemption price per share if such action is voluntary,
together in each case with dividends accrued to the date of distribution.

VOTING RIGHTS

    Holders of  Common Stock  have general  voting rights,  but holders  of  the
Cumulative  Preferred Stock, except as otherwise  required by law, have only the
voting rights set forth below.

    Whenever dividends on any shares of  any series of the Cumulative  Preferred
Stock  shall  have accrued  and remain  unpaid in  an amount  equal to  six full
quarterly dividends thereon,  holders of  the Cumulative  Preferred Stock  shall
have  the exclusive right, voting separately as  a class, to elect a majority of
the Directors until  all dividends in  default thereon shall  have been paid  or
declared and set apart for payment.

    Without  the  affirmative vote  of  holders of  at  least two-thirds  of the
outstanding Cumulative Preferred Stock, the Company shall not:

        (a) change any provisions of the Cumulative Preferred Stock which  would
    be  substantially prejudicial to  the holders thereof,  except that, if such
    change is prejudicial to less than all series thereof, only the  affirmative
    vote  of holders of two-thirds of the  series so affected shall be required;
    or

        (b) create any class of stock ranking  prior to or on a parity with  the
    Cumulative  Preferred Stock in respect of either the payment of dividends or
    the distribution of assets.

    Without the  affirmative vote  of holders  of  at least  a majority  of  the
outstanding Cumulative Preferred Stock, the Company shall not:

        (a)  issue any additional shares of Cumulative Preferred Stock or of any
    class of stock ranking prior to or on a parity with the Cumulative Preferred
    Stock in respect of either the  payment of dividends or the distribution  of
    assets  (except  for the  purpose  of retiring  stock  ranking prior  to the
    Cumulative Preferred  Stock  or  for  the  purpose  of  retiring  Cumulative
    Preferred  Stock or stock ranking on a parity therewith if the shares issued
    are only  shares thereof  or on  a parity  therewith) unless,  after  giving
    effect thereto,

           (i)  net income of the Company for any period of twelve months within
       the next preceding fifteen months (after adding back interest charges  on
       funded  debt of the Company deducted  in the computation) shall have been
       at least equal to one  and one-half (1 1/2) times  the sum of the  annual
       interest  charges on funded debt of the  Company to be outstanding at the
       date  of  such  issue  plus  the  annual  dividend  requirements  on  the
       Cumulative  Preferred Stock and on any class of stock ranking prior to or
       on a parity with the Cumulative Preferred Stock in respect of either  the
       payment  of  dividends  or the  distribution  of  assets which  is  to be
       outstanding at the date of such issue, including the shares to be  issued
       but  excluding any funded debt or shares of such prior or parity stock to
       be retired in connection with such issue; and

           (ii) the aggregate amount of capital and paid-in premiums represented
       by the Common Stock and any other junior stock plus the earned surplus of
       the Company would be at least  equal to the capital and paid-in  premiums
       represented  by  the  Cumulative  Preferred  Stock  and  all  other stock

                                       9
<PAGE>
       ranking prior to or  on a parity with  the Cumulative Preferred Stock  in
       respect  of either the payment of dividends or the distribution of assets
       to be outstanding  after giving effect  to such issue  but excluding  any
       such stock to be retired in connection therewith; or

        (b)  merge into  or consolidate  with any  other corporation  or sell or
    transfer its  assets  as, or  substantially  as, an  entirety,  unless  such
    merger, consolidation, sale or transfer shall have been required by order of
    the  Massachusetts  Department  of  Public  Utilities  or  other  regulatory
    authority of  The Commonwealth  of  Massachusetts or  of the  United  States
    having  jurisdiction in the premises, or unless,  in the case of such merger
    or consolidation, the Company shall itself be the successor corporation. The
    term "sale or transfer" includes a lease or exchange but does not include  a
    mortgage or pledge.

PRE-EMPTIVE RIGHTS

    Holders  of Cumulative Preferred  Stock will not  have pre-emptive rights in
respect of additional issues of capital stock.

OTHER PROVISIONS

    Any sinking or purchase fund  or conversion, participation or other  special
rights  for  the  New  Preferred  Stock  will  be  described  in  the Prospectus
Supplement relating to such New Preferred  Stock. The New Preferred Stock,  when
issued and paid for at the price determined by the Directors, will be fully paid
and not liable for further call or assessment.

    The  Transfer Agent and Registrar for the Company's capital stock, including
the New  Preferred Stock,  is The  First National  Bank of  Boston, 100  Federal
Street, Boston, Massachusetts 02110.

    In  New York City, shares of Cumulative Preferred Stock may be presented for
transfer at the office  of BancBoston Trust Company  of NY, One Exchange  Plaza,
3rd Floor, 55 Broadway, New York, New York 10006.

                                       10
<PAGE>
                        DESCRIPTION OF DEPOSITARY SHARES

    The description set forth below and in any Prospectus Supplement relating to
a  series of New Preferred Stock of  certain provisions of the Deposit Agreement
(as defined below) and of the Depositary Shares and Depositary Receipts does not
purport to be  complete and  is subject  to, and  qualified in  its entirety  by
reference  to, the  form of  Deposit Agreement  and form  of Depositary Receipts
relating to each  series of the  New Preferred  Stock which are  filed with  the
Commission as exhibits to the Registration Statement of which this Prospectus is
a part.

GENERAL

    The  Company  may, at  its option,  elect to  offer fractional  interests in
shares of the New Preferred Stock by means of the issuance of Depositary Shares.
The shares of any  series of the New  Preferred Stock underlying the  Depositary
Shares  will  be  deposited under  a  separate Deposit  Agreement  (the "Deposit
Agreement") between the  Company and  a bank or  trust company  selected by  the
Company  (the "Depositary"). The  Prospectus Supplement relating  to a series of
Depositary Shares will set forth the name and address of the Depositary. Subject
to the terms of the Deposit Agreement, each owner of a Depositary Share will  be
entitled  proportionately to  all the rights  and preferences  of the Cumulative
Preferred Stock underlying  such Depositary Share  (including dividend,  voting,
redemption, conversion and liquidation rights).

    The  Depositary  Shares  will  be evidenced  by  Depositary  Receipts issued
pursuant to the Deposit Agreement, each  of which will represent the  fractional
interest  in a share of a particular series of the New Preferred Stock described
in the Prospectus Supplement.

DIVIDENDS

    The  Depositary  will   distribute  all   cash  dividends   or  other   cash
distributions  received  in respect  of the  New Preferred  Stock to  the record
holders  of  Depositary  Receipts  relating  to  such  New  Preferred  Stock  in
proportion to the numbers of such Depositary Shares owned by such holders on the
relevant record date. The Depositary shall distribute only such amount, however,
as  can be distributed without attributing to  any holder of Depositary Shares a
fraction of one cent, and any balance  not so distributed shall be added to  and
treated  as part of the next sum  received by the Depositary for distribution to
holders of Depositary Shares.

REDEMPTION OF DEPOSITARY SHARES

    If a series of the New  Preferred Stock underlying the Depositary Shares  is
subject  to redemption, the Depositary Shares will be redeemed from the proceeds
received by the Depositary resulting from  the redemption, in whole or in  part,
of such series of the New Preferred Stock held by the Depositary. The redemption
price  per Depositary  Share will  be equal  to the  applicable fraction  of the
redemption price  per share  payable with  respect  to such  series of  the  New
Preferred  Stock. If less than all the Depositary Shares are to be redeemed, the
Depositary Shares  to be  redeemed  will be  selected by  lot  by the  Board  of
Directors.

VOTING

    Upon receipt of notice of any meeting at which the holders of the Cumulative
Preferred  Stock are entitled to vote,  the Depositary will mail the information
contained in such  notice of  meeting to the  record holders  of the  Depositary
Receipts  evidencing  Depositary Shares  relating  to such  Cumulative Preferred
Stock. Each record holder of such Depositary Receipts on the record date  (which
will  be the same  date as the  record date for  the Cumulative Preferred Stock)
will be entitled to  instruct the Depositary  as to the  exercise of the  voting
rights pertaining to the amount of Cumulative Preferred Stock represented by the
Depositary  Shares evidenced  by such  Depositary Receipts.  The Depositary will
endeavor, insofar as  practicable, to  vote the amount  of Cumulative  Preferred
Stock  underlying such Depositary  Shares in accordance  with such instructions,
and the Company will agree to take  all action which may be deemed necessary  by
the  Depositary in order to enable the  Depositary to do so. The Depositary will
abstain from voting the  Cumulative Preferred Stock to  the extent that it  does
not  receive specific instructions  from the holders  of the Depositary Receipts
evidencing Depositary Shares representing such Cumulative Preferred Stock.

                                       11
<PAGE>
WITHDRAWAL OF CUMULATIVE PREFERRED STOCK

    Upon surrender  of  Depositary  Receipts  at the  Corporate  Office  of  the
Depositary  and upon payment of the Depositary's customary charges therefor, and
subject to  the terms  of the  Deposit Agreement,  the owner  of the  Depositary
Shares  evidenced thereby is entitled to delivery  of the number of whole shares
of Cumulative Preferred Stock represented  by such Depositary Shares. Owners  of
Depositary  Shares will be  entitled to receive only  whole shares of Cumulative
Preferred Stock on the basis of one share of Cumulative Preferred Stock for  the
number  of Depositary Shares specified in  the Prospectus Supplement relating to
such Depositary Shares. Partial shares of Cumulative Preferred Stock will not be
issued. If the Depositary Receipts delivered by the holder evidence a number  of
Depositary  Shares in excess of the number of Depositary Shares representing the
number of  whole shares  of  Cumulative Preferred  Stock  to be  withdrawn,  the
Depositary will deliver to such holder at the same time a new Depositary Receipt
evidencing  such  excess  number  of Depositary  Shares.  Holders  of  shares of
Cumulative Preferred Stock  thus withdrawn  will not thereafter  be entitled  to
deposit  such  shares  under  the Deposit  Agreement  or  to  receive Depositary
Receipts evidencing Depositary Shares therefor.

AMENDMENT OF FORM OF DEPOSITARY RECEIPTS AND OF DEPOSIT AGREEMENT

    The form  of Depositary  Receipt evidencing  the Depositary  Shares and  any
provision  of the  Deposit Agreement  may at  any time  be amended  by agreement
between the Company and  the Depositary, provided,  however, that any  amendment
which  materially and  adversely alters  the rights  of the  existing holders of
Depositary Shares will not be effective unless such amendment has been  approved
by holders of at least a majority of the Depositary Shares then outstanding.

CHARGES OF DEPOSITARY

    The  Company will pay all transfer  and other taxes and governmental charges
that arise solely from the existence of the depositary arrangements. The Company
will pay charges of the Depositary in connection with the initial deposit of the
Cumulative Preferred Stock, the initial issuance of the Depositary Receipts  and
any  redemption of the Cumulative Preferred  Stock. Holders of Depositary Shares
will pay all other  transfer and other taxes  and governmental charges, and,  in
addition,  such other charges as are expressly provided in the Deposit Agreement
to be for their accounts.

TAXATION

    Owners of Depositary Shares will be treated for Federal income tax  purposes
as  if they were  owners of the  Cumulative Preferred Stock  represented by such
Depositary Shares and, accordingly,  will be entitled to  take into account  for
Federal  income  tax  purposes income  and  deductions  to which  they  would be
entitled if they were holders of  such Cumulative Preferred Stock. In  addition,
(i)  no gain or loss will be recognized for Federal income tax purposes upon the
withdrawal of Cumulative Preferred  Stock in exchange  for Depositary Shares  as
provided  in  the  Deposit  Agreement,  (ii) the  tax  basis  of  each  share of
Cumulative Preferred Stock  to an  exchanging owner of  Depositary Shares  will,
upon  such exchange, be  the same as  the aggregate tax  basis of the Depositary
Shares exchanged  therefor, and  (iii)  the holding  period  for shares  of  the
Cumulative  Preferred Stock  in the hands  of an exchanging  owner of Depositary
Shares who held such Depositary Shares at  the time of the exchange thereof  for
Cumulative  Preferred Stock  will include  the period  during which  such person
owned such Depositary Shares.

MISCELLANEOUS

    The Company, or at the option  of the Company, the Depositary, will  forward
to  the holders  of Depositary  Shares all  reports and  communications from the
Company which the  Company may  be required  to furnish  to the  holders of  the
Cumulative Preferred Stock.

    Neither  the Depositary nor the Company will be liable if it is prevented or
delayed by  law  or  any  circumstance beyond  its  control  in  performing  its
obligations  under the Deposit Agreement. The obligations of the Company and the
Depositary under the Deposit  Agreement will be limited  to performance in  good
faith  of their duties thereunder and they will not be obligated to prosecute or
defend any legal proceeding  in respect of any  Depositary Shares or  Cumulative
Preferred Stock unless satisfactory indemnity is furnished.

                                       12
<PAGE>
They  may rely  upon written  advice of  counsel or  accountants, or information
provided by persons presenting Cumulative  Preferred Stock for deposit,  holders
of  Depositary Shares or other persons believed to be competent and on documents
believed to be genuine.

RESIGNATION AND REMOVAL OF DEPOSITARY; TERMINATION OF THE DEPOSIT AGREEMENT

    The Depositary may resign at any time by delivering to the Company notice of
its election to do so,  and the Company may at  any time remove the  Depositary,
any  such  resignation or  removal  to take  effect  upon the  appointment  of a
successor Depositary  and its  acceptance of  such appointment.  Such  successor
Depositary will be appointed by the Company within 60 days after delivery of the
notice of resignation or removal. The Deposit Agreement may be terminated at the
direction  of the Company  or by the  Depositary only after  (i) all outstanding
Depositary Shares have been redeemed or (ii) there shall have been made a  final
distribution  with  respect to  the Cumulative  Preferred Stock  underlying such
Depositary Shares in connection with any liquidation, dissolution or winding  up
of  the Company and such distribution shall  have been distributed to the record
holders of the Depositary Receipts, or otherwise provided for. Upon  termination
of  the  Deposit  Agreement, the  Depositary  will discontinue  the  transfer of
Depositary Receipts, will suspend the  distribution of dividends to the  holders
thereof,  and  will not  give any  further  notices (other  than notice  of such
termination) or  perform any  further  acts under  the Deposit  Agreement.  Upon
request  of  the  Company,  the Depositary  shall  deliver  all  books, records,
certificates evidencing  Cumulative  Preferred Stock,  Depositary  Receipts  and
other  documents respecting the  subject matter of the  Deposit Agreement to the
Company.

                          DESCRIPTION OF CAPITAL STOCK

    The description  set forth  below  of certain  provisions of  the  Company's
Restated  Articles of Organization, as amended,  the laws of The Commonwealth of
Massachusetts and  the regulations  of the  Massachusetts Department  of  Public
Utilities  does not purport to  be complete and is  subject to, and qualified in
its entirety by reference to,  the Company's Restated Articles of  Organization,
as amended, the laws of The Commonwealth of Massachusetts and the regulations of
the Massachusetts Department of Public Utilities.

    The  capital stock of the Company consists  of Common Stock, par value $1.00
per share,  of which  100,000,000  shares have  been authorized  and  44,763,055
shares  had been issued and were outstanding  as of December 31, 1992; 2,830,000
authorized shares of Cumulative Preferred Stock, par value $100 per share, which
may be issued in series and of  which 2,210,000 shares had been issued and  were
outstanding  as of  December 31, 1992  as described above  under "Description of
Cumulative Preferred  Stock  -- General",  and  8,000,000 authorized  shares  of
Preference Stock, par value $1 per share, which may be issued in series, none of
which  were  outstanding  as  of December  31,  1992.  Authorized  share amounts
indicated above are as of the date of this Prospectus.

    Subject to the preferential  rights of holders  of the Cumulative  Preferred
Stock  (see "Description  of Cumulative Preferred  Stock --  Dividends") and the
Cumulative Preference Stock to receive full cumulative dividends at the dividend
rate fixed for  each series and  designated in the  title thereof, dividends  on
Common Stock may be declared and paid as the Board of Directors may determine.

    Except  as  provided by  Massachusetts law  or in  the Restated  Articles of
Organization of  the  Company,  holders  of the  Common  Stock  shall  have  the
exclusive  right to vote for the election of Directors and for any other purpose
or on any other subject. The Restated Articles of Organization provide, however,
that whenever dividends on any shares of any series of the Cumulative  Preferred
Stock  shall  have accrued  and remain  unpaid in  an amount  equal to  six full
quarterly dividends thereon,  holders of  the Cumulative  Preferred Stock  shall
have  the exclusive right, voting separately as  a class, to elect a majority of
the Directors until  all dividends in  default thereon shall  have been paid  or
declared and set apart for payment, and the remaining Directors shall be elected
by  the holders  of the Common  Stock. See "Description  of Cumulative Preferred
Stock --  Voting Rights".  In addition,  the Restated  Articles of  Organization
provide  that  whenever dividends  on  any shares  of  any series  of Cumulative
Preference Stock have accrued and remain unpaid  in an amount equal to six  full
quarterly dividends thereon, holders of the Preference Stock, voting as a class,
have  the  right  to  elect  two directors  if  the  total  number  of directors
constituting the full Board  of Directors is  five or more,  or one director  if
such  total number is three  or four, until all  accrued and unpaid dividends on

                                       13
<PAGE>
shares of Cumulative Preference Stock  have been paid in  full or set apart  for
payment. The Restated Articles of Organization further provide that stockholders
entitled  to vote  at any meeting  shall have one  vote for each  share of stock
owned by them.

    In the event of liquidation, dissolution or winding up of the affairs of the
Company or distribution of its capital, holders of the six series of  Cumulative
Preferred  Stock  now outstanding  are entitled  to receive  $100 per  share, if
involuntary,  or  the  applicable  redemption  price,  if  voluntary.  Upon  any
liquidation,  dissolution or winding up of the Company, holders of any series of
Preference Stock hereafter issued are entitled to receive, subject to the  prior
preferential  rights  of the  Cumulative  Preferred Stock  (see  "Description of
Cumulative Preferred Stock -- Liquidation"), the amount fixed and determined  by
the  Board of Directors for such series. In any of such events, after payment to
holders of the Cumulative Preferred Stock and the Cumulative Preference Stock of
the foregoing  distributive  amounts, the  remaining  assets and  funds  of  the
Company shall be distributed among the holders of Common Stock.

    The  Company's Restated Articles of  Organization and Bylaws contain certain
provisions that  may be  viewed  as having  an anti-takeover  effect,  including
provisions  establishing  a  classified  Board  of  Directors  and  requiring  a
supermajority vote of the disinterested stockholders to approve certain business
transactions with a stockholder owning more than 5% of the outstanding shares of
the Company's Common Stock. The Company is  also subject to (i) Chapter 110D  of
the  Massachusetts General Laws, that, in  general, prevents anyone who acquires
20% or more of a company's shares from voting those shares unless  disinterested
stockholders  (excluding  the  bidder  and  the  company's  management)  vote to
enfranchise the bidder, and (ii) Chapter 110F of the Massachusetts General Laws,
that, in general, provides that for three years after an acquiror has  purchased
5%  or  more of  the  stock of  a  company, the  acquiror  may not  complete the
acquisition through merger, sell or pledge the assets of the company, or  engage
in other self-dealing transactions.

    Holders of the Common Stock have no conversion or pre-emptive rights and are
not liable for further call or assessment.

    The Common Stock of the Company is listed on the New York Stock Exchange and
the  Boston  Stock  Exchange.  Application  will be  made  for  listing  on such
exchanges  of  additional  shares  of  Common  Stock  offered  in  a  Prospectus
Supplement relating to this Prospectus.

    The  Transfer Agent and Registrar for the Company's capital stock, including
the Common Stock,  is The  First National Bank  of Boston,  100 Federal  Street,
Boston, Massachusetts 02110. In New York City, the Common Stock may be presented
for  transfer at  the office  of BancBoston  Trust Company  of NY,  One Exchange
Plaza, 3rd Floor, 55 Broadway, New York, New York 10006.

DIVIDEND REINVESTMENT AND STOCK PURCHASE PLAN

    Under the  Company's  Dividend Reinvestment  and  Stock Purchase  Plan  (the
"DRP"),  participants are able to reinvest dividends  paid by the Company in the
purchase of  additional  shares of  Common  Stock of  the  Company and  to  make
optional cash payments (up to $5,000 per calendar quarter) to acquire additional
shares of Common Stock of the Company. Shares purchased under the DRP may either
be shares purchased in the open market or shares newly issued by the Company.

                                 LEGAL OPINIONS

    The  validity of the Securities will be passed upon for the Company by Ropes
& Gray, One International Place, Boston, Massachusetts, counsel for the Company.
Thomas G. Dignan, Jr., a partner of Ropes & Gray, is a Director of the  Company.
Certain  legal matters will be passed upon for the underwriters and/or agents by
Choate, Hall & Stewart, Exchange Place, 53 State Street, Boston, Massachusetts.

                                    EXPERTS

    The consolidated balance  sheets as of  December 31, 1992  and 1991 and  the
consolidated statements of income, retained earnings, and cash flows for each of
the    three    years    in    the    period    ended    December    31,   1992,

                                       14
<PAGE>
incorporated by reference in this  Prospectus, have been incorporated herein  in
reliance  on the report of Coopers  & Lybrand, independent accountants, given on
the authority of that firm as experts in accounting and auditing.

    With respect to the unaudited interim consolidated financial information for
the periods ended September 30, 1992 and 1991, June 30, 1992 and 1991, and March
31, 1992  and 1991,  incorporated by  reference in  this Prospectus,  Coopers  &
Lybrand  have reported that  they have applied  limited procedures in accordance
with professional standards  for a  review of such  information. However,  their
separate  reports included in  the Company's Quarterly Reports  on Form 10-Q for
the quarters ended September  30, 1992, June  30, 1992 and  March 31, 1992,  and
incorporated  by reference herein, state that they did not audit and they do not
express  an  opinion  on   that  interim  consolidated  financial   information.
Accordingly,  the degree of reliance on their reports on such information should
be restricted in light of the  limited nature of the review procedures  applied.
Coopers  & Lybrand are not subject to  the liability provisions of Section 11 of
the Securities Act of  1933, as amended  (the "Act"), for  their reports on  the
unaudited  interim consolidated  financial information because  such reports are
not "reports" or a "part" of the registration statement prepared or certified by
Coopers & Lybrand within the meaning of Sections 7 and 11 of the Act.

    Ropes & Gray  has reviewed the  statements as  to matters of  law and  legal
conclusions  under "Description of Debt  Securities", "Description of Cumulative
Preferred Stock",  "Description  of  Depositary  Shares",  and  "Description  of
Capital Stock." Such statements are included on the authority of said firm.

                              PLAN OF DISTRIBUTION

    The Company may sell the Securities to or through underwriters, and also may
sell  the  Securities  directly  to  other  purchasers  or  through  agents. The
distribution of the Securities may be effected from time to time in one or  more
transactions  at a  fixed price or  prices, which  may be changed,  or at market
prices prevailing at  the time  of sale, at  prices related  to such  prevailing
market prices or at negotiated prices.

    In  connection with the  sale of the Securities,  underwriters or agents may
receive compensation from the Company or  from purchasers of the Securities  for
whom  they  may  act  as  agents  in  the  form  of  discounts,  concessions  or
commissions. Underwriters may  sell the  Securities to or  through dealers,  and
such  dealers may receive compensation in  the form of discounts, concessions or
commissions from the  underwriters and/or  commissions from  the purchasers  for
whom  they may act as agents.  Underwriters, dealers and agents that participate
in the distribution of the Securities may be deemed to be underwriters, and  any
discounts or commissions received by them from the Company and any profit on the
resale  of the Securities by them may be deemed to be underwriting discounts and
commissions under the Act. Any such underwriter or agent will be identified, and
any such  compensation  received  from  the Company  will  be  described,  in  a
Prospectus Supplement.

    Under  agreements which may be entered into by the Company, underwriters and
agents who participate in the distribution of the Securities may be entitled  to
indemnification   by   the  Company   against  certain   liabilities,  including
liabilities under the Act.

    If so  indicated in  a  Prospectus Supplement,  the Company  will  authorize
underwriters  or other persons acting as  the Company's agents to solicit offers
by certain institutions to purchase the Securities from the Company pursuant  to
contracts providing for payment and delivery on a future date. Institutions with
which such contracts may be made include commercial and savings banks, insurance
companies,  pension  funds,  investment  companies,  educational  and charitable
institutions and others, but in all cases such institutions must be approved  by
the  Company. The obligations of  any purchaser under any  such contract will be
subject to the condition that the  purchase of the offered Securities shall  not
at  the time  of delivery be  prohibited under  the laws of  the jurisdiction to
which such purchaser is subject. The underwriters and such other agents will not
have any  responsibility in  respect  of the  validity  or performance  of  such
contracts.

                                       15
<PAGE>
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    NO  PERSON  HAS BEEN  AUTHORIZED  TO GIVE  ANY  INFORMATION OR  TO  MAKE ANY
REPRESENTATIONS OTHER THAN THOSE CONTAINED IN THIS PROSPECTUS SUPPLEMENT OR  THE
PROSPECTUS,  AND, IF GIVEN OR MADE, SUCH INFORMATION OR REPRESENTATIONS MUST NOT
BE RELIED UPON AS HAVING BEEN AUTHORIZED. NEITHER THIS PROSPECTUS SUPPLEMENT NOR
THE PROSPECTUS CONSTITUTES AN OFFER TO SELL  OR THE SOLICITATION OF AN OFFER  TO
BUY  ANY  SECURITIES  OTHER THAN  THE  SECURITIES DESCRIBED  IN  THIS PROSPECTUS
SUPPLEMENT OR AN  OFFER TO  SELL OR  THE SOLICITATION OF  AN OFFER  TO BUY  SUCH
SECURITIES IN ANY CIRCUMSTANCES IN WHICH SUCH OFFER OR SOLICITATION IS UNLAWFUL.
NEITHER  THE DELIVERY  OF THIS PROSPECTUS  SUPPLEMENT OR THE  PROSPECTUS NOR ANY
SALE MADE HEREUNDER  OR THEREUNDER  SHALL, UNDER ANY  CIRCUMSTANCES, CREATE  ANY
IMPLICATION  THAT THERE HAS BEEN  NO CHANGE IN THE  AFFAIRS OF THE COMPANY SINCE
THE DATE HEREOF OR THEREOF OR  THAT THE INFORMATION CONTAINED HEREIN OR  THEREIN
IS CORRECT AS OF ANY TIME SUBSEQUENT TO THE DATE OF SUCH INFORMATION.

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

                               TABLE OF CONTENTS
                             PROSPECTUS SUPPLEMENT

<TABLE>
<CAPTION>
                                                       PAGE
                                                       -----
<S>                                                 <C>
Recent Dividends and Stock Price Information......         S-2
Use of Proceeds...................................         S-2
Recent Developments...............................         S-2
Plan of Distribution..............................         S-3
Legal Opinions....................................         S-4
Experts...........................................         S-4

                          PROSPECTUS
Available Information.............................           2
Incorporation of Certain Documents by Reference...           2
The Company.......................................           3
Use of Proceeds...................................           3
Plant Expenditures and Financing..................           4
Ratio of Earnings to Fixed Charges and Ratio of
  Earnings to Fixed Charges and Preferred
  Dividends.......................................           4
Dividends and Stock Price Information.............           5
Description of Debt Securities....................           5
Description of Cumulative Preferred Stock.........           8
Description of Depositary Shares..................          11
Description of Capital Stock......................          13
Legal Opinions....................................          14
Experts...........................................          14
Plan of Distribution..............................          15
</TABLE>

                                1,000,000 SHARES

                             BOSTON EDISON COMPANY

                                  COMMON STOCK
                               ($1.00 PAR VALUE)

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

                             PROSPECTUS SUPPLEMENT

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

                              MERRILL LYNCH & CO.

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