LACLEDE GAS CO
S-3, 1999-03-15
NATURAL GAS DISTRIBUTION
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<PAGE>
 
    As filed with the Securities and Exchange Commission on March 15, 1999
                                                     Registration No. 333-
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
 
                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549
 
                                ---------------
 
                                   FORM S-3
                            REGISTRATION STATEMENT
                       Under The Securities Act of 1933
 
                                ---------------
 
                              LACLEDE GAS COMPANY
            (Exact name of Registrant as specified in its charter)
 
                                ---------------
 
<TABLE>
   <S>                                              <C>
                       Missouri                                 43-0368139
           (State or other jurisdiction of                   (I.R.S. Employer
            incorporation or organization)                  Identification No.)
 
           720 Olive Street, St. Louis, Missouri 63101, 314-342-0500
  (Address, including zip code, and telephone number, including area code, of
                   Registrant's principal executive offices)
 
              D. H. Yaeger, G. T. McNeive, Jr., or M. C. Kullman
Laclede Gas Company, 720 Olive Street, St. Louis, Missouri 63101, 314-342-0500
(Name, address, including zip code, and telephone number, including area code,
                             of agent for service)
 
                                  Copies to:
             GERALD T. McNEIVE, JR., ESQ.                  TODD W. ECKLAND, ESQ.
                MARY C. KULLMAN, ESQ.               Winthrop, Stimson, Putnam & Roberts
                 Laclede Gas Company                      One Battery Park Plaza
                   720 Olive Street                    New York, New York 10004-1490
              St. Louis, Missouri 63101                       (212) 858-1000
                    (314) 342-0500                          Fax: (212) 858-1500
                 Fax: (314) 421-1979
</TABLE>
 
                                ---------------
 
  Approximate date of commencement of proposed sale to the public: as soon as
practicable after the effective date of this Registration Statement.
  If the only securities being registered on this Form are being offered
pursuant to dividend or interest reinvestment plans, please check the
following box. [_]
  If any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, other than securities offered only in connection with dividend or
interest reinvestment plans, check the following box. [_]
  If this form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, check the following box and
list the Securities Act registration statement number of the earlier effective
registration statement for the same offering. [_]
  If this form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [_]
  If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box. [_]
 
                        CALCULATION OF REGISTRATION FEE
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- -------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                                          Proposed
                                           Proposed       maximum
 Title of each class of    Amount to       maximum       aggregate      Amount of
    securities to be           be       offering price    offering     registration
       registered        registered(1)   per share(2)     price(2)         fee
- -----------------------------------------------------------------------------------
<S>                      <C>            <C>            <C>            <C>
Common Stock, $1.00 per    1,250,000
 share par value(3).....     shares         $22.41      $28,012,500     $7,787.48
- -----------------------------------------------------------------------------------
</TABLE>
- -------------------------------------------------------------------------------
(1) Includes 150,000 shares subject to the Underwriters' over-allotment
    option.
(2) Estimated solely for purposes of calculating the registration fee in
    accordance with Rule 457 under the Securities Act. The average of the high
    and low prices for the Registrant's Common Stock reported on the New York
    Stock Exchange on March 10, 1999 was $22.41 per share.
(3) Includes a Common Stock Purchase Right attached to each share of Common
    Stock, which, prior to the occurrence of certain events, will not be
    evidenced separately from the Common Stock.
 
                                ---------------
  The registrant hereby amends this registration statement on such date or
dates as may be necessary to delay its effective date until the registrant
shall file a further amendment which specifically states that this
registration statement shall thereafter become effective in accordance with
section 8(a) of the Securities Act of 1933 or until this registration
statement shall become effective on such date as the Commission acting
pursuant to such section 8(a) may determine.
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
<PAGE>
 
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+The information in this prospectus is not complete and may be changed. We may +
+not sell or accept offers to buy these securities before the registration     +
+statement filed with the Securities and Exchange Commission is effective.     +
+This prospectus is not an offer to sell these securities and is not           +
+soliciting an offer to buy these securities in any state where the offer or   +
+sale is not permitted.                                                        +
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
                  SUBJECT TO COMPLETION, DATED MARCH 15, 1999
 
PROSPECTUS
 
                                1,100,000 Shares
                              Laclede Gas Company
                                  Common Stock
                                $1.00 Par Value
 
                                  -----------
 
    Laclede Gas Company, a Missouri corporation organized in 1857, is a local
gas distribution public utility. Our service area includes the City of St.
Louis, St. Louis County, and parts of eight other counties in eastern Missouri.
We are offering 1,100,000 shares of common stock. Our shares are listed on the
New York and Chicago Stock Exchanges under the symbol "LG." On March 11, 1999,
the last reported sale price of our common stock on the New York Stock Exchange
was $22 5/8 per share.
 
<TABLE>
<CAPTION>
                                                           Per Share Total
                                                           --------- -----
      <S>                                                  <C>       <C>
      Public Offering Price...............................     $       $
      Underwriting Discount...............................     $       $
      Proceeds, before expenses, to Laclede Gas Company...     $       $
</TABLE>
 
                                  -----------
 
    The underwriters may also purchase up to an additional 150,000 shares from
us at the public offering price, less the underwriting discount, within 30 days
from the date of this prospectus to cover over-allotments.
 
    Neither the Securities and Exchange Commission nor any state securities
commission has approved or disapproved of these securities or determined if
this prospectus is truthful or complete. Any representation to the contrary is
a criminal offense.
 
    The shares of common stock will be ready for delivery in New York, New York
on or about       , 1999.
 
                                  -----------
 
Merrill Lynch & Co.                                    A.G. Edwards & Sons, Inc.
 
 
                       This Prospectus is dated   , 1999.
<PAGE>
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                                            Page
                                                                            ----
<S>                                                                         <C>
Where You Can Find More Information .......................................   1
Summary ...................................................................   2
Service Area and Transmission Pipelines ...................................   4
Use of Proceeds ...........................................................   5
Laclede Gas Company .......................................................   5
Price Range of Common Stock and Dividends .................................   9
Description of Common Stock ...............................................  10
Underwriting ..............................................................  14
Legal Opinions ............................................................  16
Experts ...................................................................  16
</TABLE>
 
                               ----------------
 
                           FORWARD-LOOKING STATEMENTS
 
      Certain statements in this prospectus (other than the financial
statements and other statements of historical fact) are forward-looking
statements made based upon our expectations and beliefs concerning future
developments and their potential effect on us. These forward-looking statements
may be identified by the use of such terms as "anticipate," "believe,"
"estimate," "expect," "intend," "plan," "seek" and similar expressions. Future
developments may not be in accordance with our expectations or beliefs and the
effect of future developments on us may not be those we anticipated. Among the
factors that may cause our actual results to differ materially from those
contemplated in any forward-looking statements are:
 
     .  weather conditions and catastrophic events
 
     .  changes in transportation and gas supply costs or availability
 
     .  regulatory actions and initiatives of federal and state regulatory
        agencies (including those affecting financings, allowed rates of
        return, incentive regulation, industry and rate structure,
        purchase gas adjustment provisions, franchise renewal and
        environmental or safety requirements, as well as the possibility
        of any such actions and initiatives being made on a retroactive
        basis)
 
     .  the effects of any industry or corporate restructuring
 
     .  conservation efforts of our customers
 
     .  economic factors such as changes in the conditions of capital
        markets, interest rates and rates of inflation
 
     .  inability to retain existing customers or to attract new customers
 
     .  our ability to obtain funds from operations or the sale of debt or
        equity to finance necessary capital expenditures and other
        investments
 
     .  employee work force issues
 
     .  statutory or tax changes
 
     .  changes in accounting standards and
 
     .  the effectiveness of Year 2000 computer system remediation efforts
        by third parties and unknown Year 2000 related problems
 
      We do not, by including this statement, assume any obligation to review
or revise any particular forward-looking statement referenced herein in light
of future events.
<PAGE>
 
                      Where You Can Find More Information
 
      We file annual, quarterly and special reports, proxy statements and other
information with the Securities and Exchange Commission (the "SEC"). You may
read and copy any document that we file at the SEC's Public Reference Room at
450 Fifth Street, N.W., Washington, D.C. 20549. Please call the SEC at 1-800-
SEC-0330 for information on the operation of the Public Reference Room. Our SEC
filings also are available to you at the SEC's website at "http://www.sec.gov."
 
      The SEC allows us to "incorporate by reference" the information we file
with them, which means that we can disclose important information to you by
referring you to those documents. The information incorporated by reference is
an important part of this prospectus, and information we file later with the
SEC will automatically update and may supersede this information. We
incorporate by reference the documents listed below and any future filings made
by us with the SEC under Section 13(a), 13(c), 14 or 15(d) of the Securities
Exchange Act of 1934 until all of the shares of Common Stock that we have
registered are sold:
 
    .  Annual Report on Form 10-K for the fiscal year ended September 30,
       1998.
 
    .  Quarterly Report on Form 10-Q for the fiscal quarter ended December
       31, 1998.
 
    .  The description of the Common Stock contained in our registration
       under Section 12 of the Securities Exchange Act of 1934, including
       any amendment or report updating such description.
 
    .  The description of our Common Stock Purchase Rights contained in our
       Form 8-A Registration Statement dated April 3, 1996.
 
      You may request a copy of these filings, at no cost, by writing or
telephoning us at the following address and phone number:
 
                           Corporate Secretary
                           Laclede Gas Company
                           720 Olive Street
                           St. Louis, Missouri 63101
                           314-342-0531
 
      You should rely only on the information contained in, or incorporated by
reference in, this prospectus. We have not, and the underwriters have not,
authorized anyone else to provide you with different information. We are not,
and the underwriters are not, making an offer of these securities in any state
where the offer is not permitted. You should not assume that the information
incorporated in this prospectus is accurate as of any date other than the date
on the front of those documents.
 
                                       1
<PAGE>
 
                                    Summary
 
      This summary highlights information contained elsewhere in this
prospectus. This summary is not complete and may not contain all of the
information that may be important to you. Before making an investment decision,
you should read this entire prospectus as well as the documents incorporated by
reference. Unless indicated otherwise, the information in this prospectus
assumes that the underwriters' overallotment option is not exercised.
 
                              Laclede Gas Company
 
<TABLE>
<S>                             <C>
Our Business................... A public utility primarily engaged in natural gas
                                distribution
 
Our Service Territory.......... The City of St. Louis, St. Louis County and parts of
                                eight other counties in eastern Missouri
 
Population of Our Service
 Territory..................... Approximately 2.0 million
 
Customers as of
 December 31, 1998............. Approximately 630,000
 
Our Address and Telephone       Laclede Gas Company
 Number........................ 720 Olive Street
                                St. Louis, Missouri 63101
                                314-342-0500
 
                                  The Offering
 
Common Stock Offered........... 1,100,000 shares
 
Common Stock Outstanding as of
 December 31, 1998............. 17,627,987 shares
 
Common Stock Outstanding as of
 December 31, 1998, Adjusted
 for the Offering.............. 18,727,987 shares
 
Listing........................ New York and Chicago Stock Exchanges (Symbol: LG)
 
Common Stock Price Range from
 March 11, 1998 to March 11,
 1999.......................... $22 5/16 to $27
 
Current Indicated Annual
 Dividend Rate................. $1.34 per share
 
Cash Dividends paid since...... 1946
 
Use of Proceeds................ General corporate purposes, including the repayment of
                                short-term debt, capital expenditures and working capital
                                requirements
</TABLE>
 
                                       2
<PAGE>
 
                  Selected Consolidated Financial Information
              (Dollar amounts in thousands, except per share data)
 
<TABLE>
<CAPTION>
                                                                 Twelve Months
                           Fiscal Year Ended September 30      Ended December 31
                          ----------------------------------   ------------------
                             1996        1997        1998        1997      1998
                          ----------  ----------  ----------   --------  --------
<S>                       <C>         <C>         <C>          <C>       <C>
Income Statement Data
Operating Revenues......  $  556,456  $  602,832  $  547,229   $608,634  $497,258
Utility Operating
 Income.................      48,410      49,725      46,666     47,443    41,881
Earnings Applicable to
 Common Stock...........      32,727      32,369      27,795     29,896    23,869
Average Number of Common
 Shares Outstanding (in
 thousands).............      17,523      17,558      17,598     17,558    17,615
Earnings Per Common
 Share..................        1.87        1.84        1.58       1.70      1.36
Dividends Declared Per
 Common Share...........        1.26        1.30        1.32      1.305     1.325
<CAPTION>
                                 As of September 30            As of December 31
                          ----------------------------------   ------------------
                             1996        1997        1998        1997      1998
                          ----------  ----------  ----------   --------  --------
<S>                       <C>         <C>         <C>          <C>       <C>
Balance Sheet Data
Total Assets............   $ 689,395  $  720,710  $  771,147   $797,659  $828,510
Net Utility Plant.......     452,165     467,573     490,585    472,201   496,966
Short-Term Debt
 (Including Current
 Maturities) ...........      59,600      99,000      98,500    127,500   136,157
Long-Term Debt
 (Excluding Current
 Maturities)............     179,346     154,413     179,238    179,105   179,256
Redeemable Preferred
 Stock..................       1,960       1,960       1,960      1,960     1,960
Common Stock Equity.....     240,843     250,387     256,785    258,202   260,562
Other Data
Heating Degree Days.....       4,880       4,953       4,404      4,910     4,024
Percent Colder (Warmer)
 than Normal............           4%          6%         (6)%        5%      (14)%
</TABLE>
 
      The table below reflects our actual capitalization and short-term debt as
of December 31, 1998 and as adjusted to reflect net proceeds from the sale of
1,100,000 shares of common stock offered in this prospectus and the application
of these net proceeds to repay a portion of our short-term debt. For more
information on our use of the net proceeds from this offering, see "Use of
Proceeds" in this prospectus. If the underwriters exercise their over-allotment
option in full, Common Stock Equity and Total Capitalization, each as adjusted,
would be $    and $    , respectively. See "Underwriting."
 
<TABLE>
<CAPTION>
                                                   As of December 31, 1998
                                                ------------------------------
                                                    Actual       As Adjusted
                                                --------------  --------------
<S>                                             <C>      <C>    <C>      <C>
Capitalization and Short-Term Debt
Short-Term Debt................................ $136,157  23.6%
Long-Term Debt.................................  179,256  31.0% $179,256      %
Redeemable Preferred Stock.....................    1,960    .3%    1,960
Common Stock Equity............................  260,562  45.1%
                                                -------- -----  -------- -----
Total Capitalization and Short-Term Debt....... $577,935 100.0% $        100.0%
                                                ======== =====  ======== =====
</TABLE>
 
                                       3
<PAGE>
 
                    Service Area and Transmission Pipelines
 
      The following map depicts (a) the counties in the eastern portion of
Missouri in which we provide service, together with transmission pipelines
owned by Mississippi River Transmission Corporation, Missouri Pipeline Company
and Williams Gas Pipeline Central, Inc. that connect to our distribution
system, and (b) Missouri and other states through which Mississippi River
Transmission Corporation's pipeline system runs.
 
                               [Graphic Omitted]
 
               [The graphic depicts the matters described above.]
 
                                       4
<PAGE>
 
                                Use of Proceeds
 
      We will use the net proceeds from the sale of the shares of common stock
for general corporate purposes, including the repayment of short-term debt,
capital expenditures and working capital requirements.
 
      At December 31, 1998, we had outstanding short-term debt of approximately
$136 million at an average interest rate of 5.43%.
 
                              Laclede Gas Company
 
General
 
      We are a public utility that distributes and transports natural gas. We
are subject to the jurisdiction of the Missouri Public Service Commission (the
"PSC") and serve the City of St. Louis, St. Louis County, the City of St.
Charles, and parts of St. Charles, Franklin, Jefferson, St. Francois, Ste.
Genevieve, Iron, Madison and Butler Counties, all in Missouri. In addition, we
operate underground natural gas storage fields and transport and store liquid
propane. We have also invested in other minor non-utility businesses.
 
      Generally, we sell gas for househeating, certain other household uses,
and commercial and industrial space heating at prices generally lower than are
charged for competitive fuels and other energy forms. While coal is competitive
as a fuel source for very large boiler plant loads, environmental concerns have
restrained any significant market inroads. Oil and propane can be used to fuel
boiler loads and certain direct-fired process applications, but these fuels
vary widely in price throughout the year, thus limiting the competitiveness of
these fuels. In certain cases, steam has been competitive with gas for downtown
area heating users. In the past five years, we have made a net conversion of 27
steam customers to natural gas service.
 
      We have approximately 630,000 customers, 94% of which are residential
customers using natural gas for heating and other household purposes. With
regard to the space and water heating market, our management believes that we
have the predominant share of the existing residential market in areas in which
we currently provide gas service, as well as the new single home construction
market in such areas, and that these market shares have not materially changed
in a number of years. For the twelve months ended December 31, 1998, sales to
residential customers accounted for approximately 67% of our revenues, with
sales to commercial and industrial customers accounting for approximately 23%
of our revenues. The balance of our revenues are primarily attributable to our
off-system sales, Gas Supply Incentive Plan and transportation service. The
tariff approved for transportation service produces a margin similar to that
which we would have received under our regular sales rates.
 
      We have been able to maintain our market position in the residential,
space-heating and water-heating markets, despite the price competition that
exists in these markets. Competition exists primarily in the large industrial
and commercial boiler fuel market where coal is the principal competing form of
energy. To a lesser extent, electricity is a competing form of energy in the
residential market. While several states have recently enacted legislation to
deregulate the electric utility industry in an effort to increase competition
and reduce the cost of electric energy, the Missouri Legislature has not to
date adopted legislation of this nature.
 
                                       5
<PAGE>
 
      The tables below reflect our utility operating revenues contributed by
each class of our customers, as well as the number of customers and therms sold
and transported in each class our of customers. One billion cubic feet ("Bcf")
of gas represents ten million therms.
 
<TABLE>
<CAPTION>
                                                           Twelve Months Ended
                          Fiscal Year Ended September 30       December 31
                         -------------------------------- ---------------------
                            1996       1997       1998       1997       1998
                         ---------- ---------- ---------- ---------- ----------
<S>                      <C>        <C>        <C>        <C>        <C>
Utility Operating
 Revenues
(In Thousands)
Residential............. $  376,818 $  395,250 $  365,768 $  403,313 $  332,297
Commercial and
 Industrial.............    145,466    152,222    132,504    152,381    116,707
Interruptible...........      2,035      2,098      2,254      2,114      2,131
Transportation..........     15,375     13,042     12,734     13,141     12,816
Off-System and Other
 Incentive..............     11,640     34,288     29,852     32,285     29,416
Exploration and
 Development............        856      1,273         --        702         --
Provision for Refunds
 and Other..............      4,266      4,659      4,117      4,698      3,891
                         ---------- ---------- ---------- ---------- ----------
  Total................. $  556,456 $  602,832 $  547,229 $  608,634 $  497,258
                         ========== ========== ========== ========== ==========
Customers
(At End of Period)
Residential.............    569,818    572,794    577,224    587,007    589,978
Commercial and
 Industrial.............     37,735     37,985     38,519     39,534     39,807
Interruptible...........         16         16         15         14         15
Transportation..........        130        142        149        145        153
                         ---------- ---------- ---------- ---------- ----------
  Total.................    607,699    610,937    615,907 $  626,700 $  629,953
                         ========== ========== ========== ========== ==========
Therms Sold and
 Transported
(In Thousands)
Residential.............    642,367    606,327    560,732    602,047    521,540
Commercial and
 Industrial.............    309,477    296,222    259,205    286,003    238,963
Interruptible...........      5,766      5,718      5,838      5,482      5,791
Transportation..........    186,400    176,622    190,811    187,183    188,915
Off-System..............     33,101    126,149    104,763    112,537    114,294
                         ---------- ---------- ---------- ---------- ----------
  Total.................  1,177,111  1,211,038  1,121,349  1,193,252  1,069,503
                         ========== ========== ========== ========== ==========
</TABLE>
 
      As a result of the large proportion of our residential heating sales
relative to our total sales, our operations are highly sensitive to seasonal
weather conditions. Historically, most of our revenues and related operating
expenses occur during the winter heating season. Accordingly, we accrue most of
our annual revenues during our first and second fiscal quarters, which are the
six months ending March 31. Results for the third and fourth fiscal quarters
frequently show net losses, reflecting significantly lower gas consumption
during the nonheating season.
 
Natural Gas Supply
 
      Our gas supply strategy has the twofold objectives of: (1) ensuring that
our gas supplies are dependable and will be delivered when needed; and (2) to
the extent compatible with that dependability, purchasing gas that is
economically priced.
 
      We obtain the majority of our gas from Gulf Coast and Mid-Continent
producing areas and have it transported through several interstate pipelines
into the pipeline systems of Mississippi River Transmission Corporation ("MRT")
for ultimate delivery to our service area. We continue to receive the majority
of our natural gas through MRT. We are the predominant shipper on MRT's
pipeline system, representing approximately 70% of its northbound capacity.
Because our contract with MRT will expire on October 31, 1999, we and MRT are
currently negotiating new arrangements to take effect after such date. Missouri
Pipeline
 
                                       6
<PAGE>
 
Company ("MPC") provides gas to the western portion of our service area. This
gas comes from the Mid-Continent producing area through the lines of Panhandle
Eastern Pipeline Company ("Panhandle"), which in turn connect to MPC's lines.
 
      Recently, we obtained a direct connection to the Mid-Continent producing
area through Williams Gas Pipeline Central, Inc. ("Williams"). Williams
converted to natural gas service an existing approximately 200-mile petroleum
products pipeline that crosses Missouri and connects directly to the Mid-
Continent producing area. We have purchased the entire capacity of the
converted pipeline, and natural gas began flowing in September 1998. This
pipeline enables us to transport gas directly to the western portion of our
service area, a fast-growing segment of our service area, as well as to access
diverse reserves on the Williams system. Ultimately, we anticipate the new
pipeline will transport about 10% of our annual natural gas purchases.
 
      We hold firm pipeline transportation capacity on several pipelines
"upstream" of the MRT system connecting us to various onshore and offshore gas-
producing basins. During fiscal year 1998, we released portions of our firm
pipeline capacity to other shippers when we did not need the capacity.
 
      During fiscal 1998, we purchased natural gas from a diverse group of 37
suppliers to meet our current gas sales and storage requirements. We purchased
a total of 78.0 Bcf of natural gas for delivery through MRT's system during
fiscal year 1998 and another 10.0 Bcf of gas for delivery through Panhandle and
MPC during fiscal 1998. Also, during fiscal 1998, certain commercial and
industrial customers purchased their own gas and transported 19.1 Bcf of gas
through our distribution system.
 
      We also have a firm storage service agreement with MRT for approximately
23.1 Bcf of allocated storage capacity on MRT's system located primarily in
Unionville, Louisiana. In addition, we supplement flowing pipeline gas with
natural gas withdrawn from our underground storage field located in St. Louis
and St. Charles Counties.
 
Propane Supply
 
      Laclede Pipeline Company, our wholly-owned subsidiary, owns and operates
a propane pipeline which connects our 800,000-barrel, or approximately 33
million gallons, propane storage facilities in St. Louis County, Missouri, to
propane supply terminal facilities located at Wood River and Cahokia, Illinois.
Laclede Pipeline Company transports liquid propane through this pipeline to us
for storage. We ultimately vaporize and use the propane to supplement our
natural gas supply to meet the peak demands on the distribution system. Laclede
Pipeline Company has a contract with Phillips Petroleum Company which provides
for delivery of up to 35 million gallons of propane annually through March 31,
1999. Laclede Pipeline Company is negotiating new arrangements for the period
subsequent to March 31, 1999.
 
Regulatory Matters
 
      At the state level, there have been several important developments
affecting us, some of which are still pending.
 
      On January 26, 1999, we filed a request with the PSC for a general rate
increase to recover costs related to the operation of our gas distribution
system. We do not anticipate higher rate levels during the current fiscal year,
because the PSC generally suspends a general rate increase request until the
PSC has reviewed and audited the filing, held hearings and reached its
determination whether and to what extent the rate increase request should be
granted. By statute, the PSC process may take no longer than 11 months. We have
requested a rate adjustment that would increase annual revenues by $30.5
million and increase a typical residential heating customer's bill by about
5.8% (or about $3.37 a month). The PSC has set August 9, 1999 as the date to
begin hearings on the request. Historically, the PSC has not granted our rate
increase requests in full.
 
      On October 15, 1998, the PSC approved an agreement with us in a general
rate case we had filed in February 1998. We had sought rates that would
increase revenues by $25.4 million annually. The approved settlement provided
that rates charged to the vast majority of our customers, including all
residential and commercial heating customers, remained unchanged. However, the
settlement also permitted us to record
 
                                       7
<PAGE>
 
substantially lower expenses in two areas effective July 1, 1998: (1)
depreciation, by establishing lower depreciation rates; and (2) pension
expense, by changing the regulatory accounting treatment for the recovery of
our pension costs. The expected annualized effect of these accounting changes
should result in a reduction of booked expenses of $16.8 million. Our currently
filed rate case described above may impact the expected effect of these
accounting changes.
 
      In addition, the PSC extended its previous authorization of certain cost-
deferral mechanisms by which we may include in future rates certain expenses
related to pensions and retirements and may apply for future rate recovery of
certain other costs related to our gas safety replacement program and our
environmental costs related to former manufactured gas plants. Further, the PSC
authorized us to capitalize the costs incurred in connection with making our
information systems ready for Year 2000 operations for consideration in future
rates.
 
      On another matter, we sought and obtained re-authorization from the PSC
to purchase a limited amount of specific financial instruments for the purpose
of capping our cost of gas in the event of any unusually large gas price
increases during the 1998-1999 winter season. The full cost of purchasing these
instruments is being recovered from customers. In June 1998, we proposed
program modifications that are designed to give us greater flexibility to trade
in and out of these instruments when warranted by market conditions, to give us
a financial incentive to increase the gas cost savings to be realized by
customers and to reduce the overall cost of purchasing such instruments. The
PSC's Staff and the Office of the Public Counsel have opposed our proposal. The
PSC had formal hearings on this issue in late July 1998, but it has not yet
issued a decision.
 
      Fiscal 1998 also was the second year of operation for our Gas Supply
Incentive Plan (the "Incentive Plan"), which has provided significant benefits
for our customers and stockholders. The PSC approved the initial Incentive Plan
in our 1996 rate case for a three-year period ending September 30, 1999. Under
the Incentive Plan, we and our customers share the benefits from off-system
sales and certain gains and losses, as measured against benchmark levels of gas
costs, related to the acquisition of our gas supply. During fiscal 1998, we
achieved overall gas cost savings of about $31.0 million, resulting in savings
to our customers of $24.6 million and contributing about $6.4 million to our
pre-tax income.
 
      In September 1997, the PSC's Staff recommended that we refund $3.6
million to our ratepayers in connection with our sale of gas outside of
Missouri during fiscal 1996, prior to the approval of the Incentive Plan. We
believe we had full authority to enter into these transactions in part under
the implementation of the Federal Energy Regulatory Commission's Order No. 636.
We filed testimony opposing the PSC Staff's recommendation and formal hearings
were held on this issue in October 1998. The PSC has not yet issued a decision.
 
      On October 30, 1998, the PSC issued an order opening a docket addressing
the adequacy of our copper service line replacement program. Under this docket,
the PSC Staff must advise the PSC of the status of its investigation by April
30, 1999. We currently face one lawsuit and two claims relative to incidents
where gas has apparently leaked from direct buried copper service lines. We are
unable to predict at this time what action, if any, the PSC may take in this
docket or the outcome of this lawsuit or any of these claims.
 
Year 2000
 
      As of December 31, 1998, we have incurred total costs of approximately
$11.9 million related to replacements and modifications of various computer
systems as part of our Year 2000 readiness program. Of this amount, $10.4
million has been capitalized and $1.5 million has been charged to expense. As
noted above, the PSC authorized us to capitalize the costs incurred in
connection with making our information systems ready for Year 2000 operations
for consideration in future rates. We estimate that costs remaining to be
incurred for the remainder of fiscal 1999 will amount to approximately $6.0
million. We currently anticipate that our modifications to our critical
internal systems and equipment will be completed by the summer of 1999. As
these modifications are made, we then test the operation of such systems or
equipment as corrected and modified to determine if any further adjustments are
required. We also continue to verify the Year 2000 readiness of our critical
vendors.
 
                                       8
<PAGE>
 
                   Price Range of Common Stock and Dividends
 
      Our common stock is listed on the New York and Chicago Stock Exchanges
and is traded under the symbol LG. The high and low sales prices for the common
stock as reported on the New York Stock Exchange composite transactions
reporting system and dividends declared for fiscal years 1997, 1998 and 1999 to
date are as follows:
 
<TABLE>
<CAPTION>
                                            Quarterly Cash       Price Range
Fiscal Year                               Dividends Declared   High       Low
- -----------                               ------------------ --------- ---------
<S>                                       <C>                <C>       <C>
1997:
  First Quarter .........................     $ .32-1/2      $24-7/8   $22-1/4
  Second Quarter.........................       .32-1/2       24-5/8    20-7/8
  Third Quarter..........................       .32-1/2       23-1/8    20-1/4
  Fourth Quarter.........................       .32-1/2       24-5/8    21-5/8
                                              ---------
                                              $1.30
                                              =========
1998:
  First Quarter..........................     $ .33          $28-5/8   $23-5/8
  Second Quarter.........................       .33           27-15/16  23-15/16
  Third Quarter..........................       .33           25-7/16   22-15/16
  Fourth Quarter.........................       .33           25        22-3/8
                                              ---------
                                              $1.32
                                              =========
1999:
  First Quarter..........................     $ .33-1/2      $27       $23
  Second Quarter (through March 11)......       .33-1/2       27        22-5/16
</TABLE>
- --------
 
      On March 11, 1999, the last reported sale price of our common stock on
the New York Stock Exchange was $22 5/8 per share. As of March 8, 1999, we had
9,485 common stockholders of record.
 
      Cash dividends on our common stock have been paid each year since 1946.
 
      Our Board of Directors' current policy is to pay cash dividends on our
common stock on a quarterly basis. Future cash dividends will depend on our
earnings, financial condition, capital requirements and other factors deemed
relevant by our Board of Directors. See "Description of Common Stock" in this
prospectus for certain restrictions upon our ability to pay cash dividends.
 
      We have a Dividend Reinvestment and Stock Purchase Plan (the "Drip
Plan"). Under the Drip Plan, stockholders may automatically reinvest, at the
then current market price, their common stock cash dividends in shares of our
common stock. Participants in the Drip Plan may make optional cash purchases of
common stock at market prices in amounts up to $30,000 per year. Additional
information about the Drip Plan is contained in the Drip Plan prospectus, which
may be obtained from the Drip Plan agent, UMB Bank, National Association, or
from us:
 
<TABLE>
        <S>                             <C>
        UMB Bank, National Association  Laclede Gas Company
        Securities Transfer Division    Corporate Secretary
        P. O. Box 410064                720 Olive Street
        Kansas City, Missouri 64141-
         0064                           St. Louis, Missouri 63101
        1-800-884-4225                  314-342-0531
</TABLE>
 
                                       9
<PAGE>
 
                          Description of Common Stock
 
      The following description of the terms of our common stock sets forth
general terms and provisions of our common stock and does not purport to be
complete and is subject to and qualified in its entirety by reference to our
Articles of Incorporation, as amended (the "Articles"), and our Mortgage and
Deed of Trust, dated as of February 1, 1945, as amended and supplemented (the
"Mortgage"), securing our first mortgage bonds.
 
      The total number of shares of capital stock which we have authority to
issue is 51,480,000 shares, consisting of 50,000,000 shares of common stock,
par value $1 per share, and 1,480,000 shares of preferred stock, par value $25
per share.
 
Dividend Rights and Limitations
 
      Subject to the limitations referred to below, our Board of Directors may
declare and pay dividends on our common stock out of funds legally available
therefor.
 
      Cash dividends on and acquisition of our capital stock are limited by
certain Mortgage provisions. Under the most restrictive of these provisions, we
may not declare or pay any dividend (other than a dividend payable in our
common stock), or otherwise acquire or retire for value any shares of common
stock if, after giving effect thereto, the aggregate net amount expended of all
such dividends, acquisitions and retirements made after September 30, 1953
would exceed the sum of (1) the Net Income Available for Common Stock (as
defined in the Mortgage) since October 1, 1953 through the last day of the
calendar quarter immediately preceding the calendar quarter in which such
dividend is declared or other acquisition or retirement occurs, plus
(2) $8 million. The aggregate net amount expended for dividends, acquisitions
and retirements is determined as the excess, if any, of the aggregate amount
thereof over the total cash amount received by us after September 30, 1953 for
shares of our common stock sold after that date.
 
      As of December 31, 1998, the availability for distribution of our
retained earnings was not impaired by the restriction described above. As of
December 31, 1998, up to approximately $221 million was thus available for
distribution.
 
      Payment of dividends on our common stock is also subject to the
preferential rights of the holders of preferred stock to receive full
cumulative dividends, both past and current. Also, we may not pay dividends on
or acquire any of our common stock if our sinking fund obligations for our
preferred stock are not met. If our net earnings (as defined in the Articles)
are less than our sinking fund obligations, an "excused failure" may occur; no
dividends may be paid on our common stock for 12 months following an excused
failure unless we make up the deficiencies in sinking fund payments. These
preferential rights and requirements do not currently impair our ability to pay
common stock dividends since we have paid and continue to pay the preferred
stock dividends as required, we have satisfied our sinking fund obligations to
date, including those for the period ending March 31, 1999, and no "excused
failure" has occurred.
 
      The Articles further provide that if the stated capital for all of our
stock junior to our preferred stock plus paid-in and capital surplus and
retained earnings is less than 25% of our total capitalization, no dividends
(other than stock dividends) will be paid on our junior stock unless (1) the
dividend is less than or equal to 75% of our net earnings, after providing for
dividends on our outstanding preferred stock, earned during the fiscal year in
which such dividend is declared and before the end of the quarter in which it
is declared, or (2) the dividend together with all dividends on our junior
stock declared or paid since the earliest date of issue of any of our
outstanding preferred stock is less than or equal to 75% of our net earnings
after providing for dividends on the outstanding preferred stock earned between
said earliest date of issue and the end of the quarter in which such dividend
is declared. This, too, does not currently impair our ability to pay dividends
on our common stock, since at December 31, 1998, the sum of our stated capital
for our common stock plus paid-in and capital surplus and retained earnings was
approximately 59% of total capitalization, thus exceeding 25% of our total
capitalization.
 
                                       10
<PAGE>
 
Voting Rights
 
      Our common stockholders are entitled to one vote for each share of our
common stock held of record at all stockholder meetings, except that whenever
six quarterly dividends payable on our preferred stock shall be in default, the
holders of all series of our preferred stock will be entitled to one vote per
share on all matters other than the election of our directors. In the event of
an election of our directors after such default, our preferred stockholders,
voting as a separate class, will have the right to elect the minimum number of
our directors required to constitute a majority of our full Board. In such
circumstances, the remainder of our full Board will be elected by our common
stockholders, voting as a separate class.
 
      Cumulative voting is applicable to all elections of our directors.
 
      Our Board of Directors is divided into three classes and each year one
class is elected to serve a three-year term.
 
Change in Control and Business Combination Provisions
 
      The Articles: (1) provide for the classification of directors, with
three-year staggered terms; (2) require an affirmative vote of holders of at
least two-thirds of the outstanding shares of our common stock to remove all or
less than all of the members of our Board of Directors (except that no director
may be removed by stockholders if the votes cast against the director's removal
would be enough to elect the director using cumulative voting at an election of
the class of directors of which the director is a member); (3) require an
affirmative vote of holders of at least two-thirds of the outstanding shares of
our common stock to change the provision relating to the classified Board of
Directors; and (4) require the affirmative vote of holders of at least 80% of
the outstanding shares of our common stock to approve Business Combinations (as
defined in the Articles) with a Substantial Shareholder (defined below), unless
approved by a majority vote of the Continuing Directors (as defined in the
Articles) or unless certain price and dividend requirements are met. Such
provisions may have significant effects on stockholders' ability to change the
composition of an incumbent Board of Directors or to benefit from transactions
which may be opposed by an incumbent Board of Directors.
 
      The term "Substantial Shareholder" is defined in the Articles to include
a securityholder (together with its Affiliates and Associates, as defined
therein) who owns more than 10% of the outstanding shares of our common stock.
The above provisions dealing with Business Combinations involving us and a
Substantial Shareholder may discriminate against a securityholder who becomes a
Substantial Shareholder by reason of ownership of such amount of our common
stock.
 
      In addition, we, as a Missouri corporation, are subject to Missouri
corporate statutes which restrict the voting rights of a person who acquires
20% or more of our outstanding common stock as well as such person's ability to
enter into a business combination with us.
 
Preferred Stock
 
      Our Board of Directors, without further action by our common
stockholders, may issue one or more series of preferred stock from time to
time, which may have terms more favorable than our common stock, including
preferential dividend, liquidation and redemption rights. As of March 11, 1999,
there were 71,870 shares of preferred stock Series B and 6,510 shares of
preferred stock Series C outstanding.
 
Common Stock Purchase Rights
 
      On May 1, 1996, we distributed a dividend of one Common Stock Purchase
Right for each share of our common stock (other than shares held in our
treasury) outstanding at the close of business on May 1, 1996 or issued
thereafter. The following description of the Rights is not intended to be
complete and is qualified in
 
                                       11
<PAGE>
 
its entirety by reference in this prospectus to the Rights Agreement between us
and Boatmen's Trust Company, the initial Rights Agent (the "Rights Agreement").
UMB Bank, National Association is the current Rights Agent. Certain of the
capitalized terms used in the following description have the meanings set forth
in the Rights Agreement.
 
      Each Right, when it becomes exercisable, as described below, will entitle
the registered holder to purchase a number of shares of our common stock, at a
purchase price of $60, subject to certain adjustments (the "Purchase Price")
and other specified conditions. Initially, the Rights are evidenced by the
certificates of our common stock, registered in the names of the holders
thereof, and are transferred with, and only with, our common stock.
 
      The Rights become exercisable upon the occurrence of a Distribution Date,
which is defined in the Rights Agreement as the earlier of: (1) the tenth
business day (or such later date as our Board of Directors may from time to
time fix by resolution) after the date on which any Person commences a tender
or exchange offer which, if consummated, would result in such Person's
acquiring beneficial ownership of 20% or more of the outstanding common stock
(such Person being called an "Acquiring Person"); and (2) the tenth business
day after (A) the first date of public announcement by us or an Acquiring
Person that a Person has become an Acquiring Person, or (B) the date on which
we first have notice or otherwise determine that a Person has become an
Acquiring Person. The definition of "Acquiring Person" excludes certain
persons, including those who inadvertently acquire beneficial ownership of 20%
or more of our outstanding common stock provided that such person promptly and
irrevocably commits to divest and does promptly divest sufficient shares of our
common stock to reduce such person's percentage of beneficial ownership below
20%.
 
      In the event that a Distribution Date occurs, each holder of a Right
(other than Rights beneficially owned by the Acquiring Person or any Affiliate
or Associate thereof, which Rights shall become void), subject to the Board of
Directors' ability to exchange such Right for our common stock as described
below, will (after the effective date of an appropriate registration statement)
have the right to purchase from us that number of shares of our common stock
having an aggregate current market price (as defined in the Rights Agreement),
on the date such person becomes an Acquiring Person giving rise to the
Distribution Date, equal to twice the Purchase Price for an amount in cash
equal to the then current Purchase Price.
 
      In addition, our Board of Directors may, at its option, at any time after
a Distribution Date and prior to the time an Acquiring Person together with any
Affiliates or Associates thereof becomes the Beneficial Owner of 50% or more of
the outstanding shares of our common stock, elect to exchange all or part of
the then outstanding Rights (other than Rights beneficially owned by the
Acquiring Person or any Affiliate or Associate thereof, which Rights shall have
become void) for shares of our common stock at an exchange ratio of one share
of our common stock per Right, appropriately adjusted to reflect any stock
split, stock dividend or similar transaction occurring after the date of the
Rights Agreement (the "Exchange Ratio"). Immediately upon such action by our
Board of Directors, the right to exercise the Rights will terminate and each
Right (other than Rights that have become void as described above) will
thereafter represent only the right to receive that number of shares of common
stock equal to the number of Rights held by such holder multiplied by the
Exchange Ratio. Any partial exchange will be made pro rata based on the number
of Rights (other than Rights that have become void as described above) held by
each holder of Rights.
 
      If we are acquired in a merger or other similar business combination
where we are not the surviving corporation, or where our common stock is
exchanged or changed, or 50% or more of our assets or earning power is sold, we
shall take such action as necessary to ensure that the Rights will "flip-over"
and entitle each holder of a Right to purchase common stock of the acquiring
corporation having an aggregate market price equal to twice the then current
Purchase Price of our common stock for an amount in cash equal to the then
current Purchase Price.
 
      At any time prior to the earlier of (1) the tenth business day following
the Stock Acquisition Date (as defined in the Rights Agreement) and (2) the
close of business on May 1, 2006, our Board of Directors may redeem the Rights
in whole, but not in part, at a price of $0.01 per Right. Under certain
circumstances the Rights Agreement may be amended from time to time by our
Board of Directors without approval of our stockholders.
 
                                       12
<PAGE>
 
      The Rights have certain anti-takeover effects. The Rights may cause
substantial dilution to a person or group that attempts to acquire us without
Board approval. The Rights will not interfere with any merger or other business
combination with a third party approved by our Board of Directors since the
Board of Directors may, at its option, redeem all but not less than all of the
then outstanding Rights as described above.
 
Miscellaneous
 
      Our outstanding common stock is, and the shares of our common stock
offered hereby when issued and paid for will be, fully paid and non-assessable.
Holders of our common stock have limited preemptive rights. The Articles
generally give holders of our common stock preemptive rights if our common
stock is to be sold solely for money and other than by a public offering,
through underwriters who agree to promptly make a public offering or pursuant
to authorization by holders of a majority of our common stock. On liquidation,
after payment of the liquidation preferences of our preferred stock, the
holders of our common stock will be entitled to receive all amounts remaining
for distribution to our stockholders.
 
      The Transfer Agent and Registrar for our common stock is UMB Bank,
National Association, Kansas City, Missouri.
 
      Our outstanding common stock is, and the shares of our common stock
offered hereby will be, listed on the New York and Chicago Stock Exchanges.
 
                                       13
<PAGE>
 
                                  Underwriting
 
      Merrill Lynch, Pierce, Fenner & Smith Incorporated and A.G. Edwards &
Sons, Inc. are acting as representatives of the underwriters named below
(collectively referred to as the "underwriters"). Subject to the terms and
conditions set forth in the underwriting agreement, we have agreed to sell to
the underwriters, and the underwriters severally have agreed to purchase from
us, the respective number of shares of our common stock indicated below.
 
<TABLE>
<CAPTION>
                                                                       Number of
          Underwriter                                                   Shares
          -----------                                                  ---------
     <S>                                                               <C>
     Merrill Lynch, Pierce, Fenner & Smith
              Incorporated............................................
     A.G. Edwards & Sons, Inc. .......................................
                                                                       ---------
          Total ...................................................... 1,100,000
                                                                       =========
</TABLE>
 
      In the underwriting agreement, the several underwriters, respectively,
have agreed, subject to the terms and conditions set forth therein, to purchase
all of the shares of common stock being sold pursuant to such agreement if any
of the shares of our common stock being sold pursuant to such agreement are
purchased. Under certain circumstances, the commitments of non-defaulting
underwriters may be increased.
 
      The representatives of the underwriters have advised us that they propose
initially to offer the shares of our common stock to the public at the public
offering price set forth on the cover page of this prospectus, and to certain
dealers at such price less a concession not in excess of $.   per share. The
underwriters may allow, and such dealers may reallow, a discount not in excess
of $.   per share of our common stock on sales to certain other dealers. After
the initial public offering, the public offering price, concession and discount
may be changed.
 
      We have granted an option to the underwriters, exercisable for 30 days
after the date of this prospectus, to purchase up to an aggregate of 150,000
additional shares of our common stock at the public offering price set forth on
the cover page of this prospectus less the underwriting discount. The
underwriters may exercise this option solely to cover over-allotments, if any,
made on the sale of our common stock offered hereby. If the underwriters
exercise this option, each underwriter will be obligated, subject to certain
conditions, to purchase a number of additional shares of our common stock
proportionate to such underwriter's initial amount reflected in the foregoing
table.
 
      The following table shows the per share and total underwriting discount
to be paid by us to the underwriters. This information is presented assuming
either no exercise or full exercise by the underwriters of their over-allotment
option.
 
<TABLE>
<CAPTION>
                                                      No Exercise Full Exercise
                                            Per Share  of Option    of Option
                                            --------- ----------- -------------
     <S>                                    <C>       <C>         <C>
     Public Offering Price ................     $          $            $
     Underwriting Discount ................
     Proceeds, before expenses, to us .....
</TABLE>
 
      The expenses of the offering are estimated at $150,000 and are payable by
us.
 
                                       14
<PAGE>
 
      The shares of our common stock are being offered by the several
underwriters, subject to prior sale, when, as and if issued to and accepted by
them, subject to approval of certain legal matters by counsel for the
underwriters and subject to certain other conditions. The underwriters reserve
the right to withdraw, cancel or modify such offer and to reject orders in
whole or in part.
 
      We have agreed not to offer or sell any other shares of our common stock
or securities convertible into or exchangeable for our common stock for 120
days after the date of this prospectus. There are some exceptions to this
restriction, including the issuance of our common stock in connection with our
employee benefit plans, our Restricted Stock Plan for Non-Employee Directors
and the Drip Plan.
 
      We have agreed to indemnify the underwriters against certain liabilities,
including certain liabilities under the Securities Act of 1933, or to
contribute to payments the underwriters may be required to make in respect
thereof.
 
      Until the distribution of the shares of our common stock is completed,
rules of the SEC may limit the ability of the underwriters and certain selling
group members to bid for and purchase the shares of our common stock. As an
exception to these rules, the representatives of the underwriters are permitted
to engage in certain transactions that stabilize the price of our common stock.
Such transactions consist of bids or purchases for the purpose of pegging,
fixing or maintaining the price of our common stock.
 
      If the underwriters create a short position in our common stock in
connection with this offering, i.e., if they sell more shares of common stock
than are set forth on the cover page of this prospectus, the representatives of
the underwriters may reduce that short position by purchasing our common stock
in the open market. The representatives may also elect to reduce any short
position by exercising all or part of the over-allotment option described
above.
 
      The representatives of the underwriters may also impose a penalty bid on
certain underwriters and selling group members. This means that if the
representatives purchase shares of our common stock in the open market to
reduce the underwriters' short position or to stabilize the price of our common
stock, they may reclaim the amount of the selling concession from the
underwriters and selling group members who sold those shares as part of this
offering.
 
      In general, purchases of a security for the purpose of stabilization or
to reduce a short position could cause the price of the security to be higher
than it might be in the absence of such purchases. The imposition of a penalty
bid might also have an effect on the price of our common stock to the extent
that it discourages resales of our common stock.
 
      Neither we nor any of the underwriters makes any representation or
prediction as to the direction or magnitude of any effect that the transactions
described above may have on the price of our common stock. In addition, neither
we nor any of the underwriters makes any representation that the
representatives of the underwriters will engage in such transactions or that
such transactions, once commenced, will not be discontinued without notice.
 
      Some of the underwriters or their affiliates have provided investment or
commercial banking services to us in the past and are likely to do so in the
future. They receive customary fees and commissions for these services.
 
                                       15
<PAGE>
 
                                 Legal Opinions
 
      The legality of the shares of our common stock offered hereby will be
passed upon for us by Gerald T. McNeive, Jr., Senior Vice President-Finance and
General Counsel. The legality of the shares of our common stock offered hereby
will be passed upon for the underwriters by Winthrop, Stimson, Putnam &
Roberts, New York, New York.
 
                                    Experts
 
      The financial statements and the related financial statement schedule
incorporated in this prospectus by reference from our Annual Report on Form 10-
K for the year ended September 30, 1998 have been audited by Deloitte & Touche
LLP, independent auditors, as stated in their report, which is incorporated
herein by reference, and has been so incorporated in reliance upon the report
of such firm given upon their authority as experts in accounting and auditing.
 
                                       16
<PAGE>
 
                                    PART II
 
                     INFORMATION NOT REQUIRED IN PROSPECTUS
 
Item 14. Other Expenses of Issuance and Distribution.
 
      The following table sets forth the estimated expenses in connection with
the issuance and sale of the Common Stock being registered.
 
<TABLE>
   <S>                                                              <C>
   Filing fee--Securities and Exchange Commission:
     Registration Statement........................................ $  7,787.48
   Filing fee--National Association of Securities Dealers Inc......    3,301.25
   New York Stock Exchange listing fees............................    4,375.00
   Chicago Stock Exchange listing fees.............................    6,250.00
   *Accountants' fee...............................................   25,000.00
   *Printing costs.................................................   75,000.00
   *Miscellaneous expense (including blue-sky expense).............   28,286.27
                                                                    -----------
     *Total Expenses............................................... $150,000.00
                                                                    ===========
</TABLE>
- --------
  *Estimated
 
Item 15. Indemnification of Directors and Officers.
 
      Under Section 351.355 of The General and Business Corporation Law of
Missouri (the "Indemnification Statute"), Laclede Gas Company (the "Company")
may indemnify any present or former director, officer, employee or agent of the
Company who was or is a party or threatened to be made a party to any
threatened, pending or completed action, suit or proceeding by reason of the
fact that he is or was a director, officer, employee or agent of the Company
against expenses, including attorneys' fees, judgments, fines and amounts paid
in settlement actually and reasonably incurred by him in connection with such
action, suit or proceeding if he acted in good faith and in a manner he
reasonably believed to be in or not opposed to the best interest of the
Company, and, with respect to any criminal action or proceeding, had no
reasonable cause to believe his conduct was unlawful. If the action or suit is
by or in the right of the Company, (1) the Company may indemnify him against
expenses, including attorneys' fees and amounts paid in settlement actually and
reasonably incurred in connection with the defense or settlement if he acted in
good faith and in a manner he reasonably believed to be in or not opposed to
the best interest of the Company, and (2) no indemnification shall be made in
respect of any claim, issue or matter as to which such person shall have been
adjudged to be liable for negligence or misconduct in the performance of his
duty to the Company unless and only to the extent that the court in which the
action or suit was brought determines upon application that the person is
fairly and reasonably entitled to indemnity for such expenses which the court
shall deem proper. The termination of an action, suit, or proceeding by
judgment, order, settlement, conviction or plea of nolo contendere does not, of
itself, create a presumption that the person did not act in good faith and in a
manner which he reasonably believed to be in or not opposed to the best
interest of the Company, and, with respect to criminal proceedings, had
reasonable cause to believe his conduct was unlawful.
 
      The Indemnification Statute further provides that the Company has the
power to give any additional indemnity to any person who is or was a director,
officer, employee or agent, provided that such additional indemnity is
authorized by the articles of incorporation or any by-law or agreement of the
Company adopted by a vote of the stockholders; however, the Company shall not
indemnify any person from or on account of such person's conduct that was
finally adjudged to have been knowingly fraudulent, deliberately dishonest or
willful misconduct.
 
      The above is a general summary of the Indemnification Statute and is
subject in all cases to the specific and detailed provisions of The General and
Business Corporation Law of Missouri.
 
                                      II-1
<PAGE>
 
      The Company's Articles provide that the Company shall indemnify each of
its directors and officers to the full extent permitted by the Indemnification
Statute and, in addition, shall indemnify each of them against all expenses
incurred in connection with any claim by reason of the fact that such director
or officer is or was, serving the Company, or at the request of the Company, in
any of the capacities referred to in the Indemnification Statute, or arising
out of such person's status in any such capacity, provided that the Company
shall not indemnify any person from or on account of such person's conduct that
was finally adjudged to have been knowingly fraudulent, deliberately dishonest
or willful misconduct, or to the extent that such indemnification shall
otherwise be finally adjudged to be prohibited by applicable law.
 
      The Indemnification Statute further provides that the Company may
purchase and maintain insurance, on behalf of any person who is or was a
director, officer, employee or agent of the Company, against any liability
asserted against him and incurred by him in any such capacity. In accordance
with this section, the Company has obtained insurance protecting the officers
and directors against certain liabilities.
 
      The Company has also entered into indemnification agreements with each of
its directors and officers that (1) provide for the indemnification of each
such director and officer to the extent provided for by the Articles as
described above and (2) state that the indemnification provided thereunder
shall survive the elimination or modification of the Articles with respect to
claims that have arisen prior to such elimination or modification.
 
      Each of the underwriters has also agreed to indemnify the Company, its
directors and each of its officers who signs this registration statement
against certain liabilities, including certain liabilities under the Securities
Act of 1933, or to contribute to payments such directors and officers may be
required to make in respect thereof.
 
      The rights of indemnification provided for above are not exclusive of any
other rights of indemnification to which the persons seeking indemnification
may be entitled under the Articles or the Company's By-Laws or any agreement,
vote of stockholders or disinterested directors, or otherwise.
 
Item 16. List of Exhibits.
 
<TABLE>
<CAPTION>
 Exhibit
 Number                                  Exhibit
 -------                                 -------
 <C>     <S>
 1.1     Form of Underwriting Agreement for Common Stock.
 4.1*    Articles of Incorporation of Laclede Gas Company as of February 11,
         1994, filed on February 22, 1994 as Exhibit 4(b) to the Company's
         Registration Statement No. 33-52357.
 4.2*    By-Laws of Laclede Gas Company effective January 26, 1995; filed as
         Exhibit 4.2 to the Company's Registration Statement No. 33-58757.
 4.2(a)* Amendment to the Company's By-Laws, effective at the close of business
         on July 24, 1997; filed as Exhibit 3.01 to the Company's 10-Q for the
         fiscal quarter ended June 30, 1997 (File No. 1-1822).
 4.2(b)* Amendment to the Company's By-Laws, effective at the close of business
         on November 20, 1997; filed as Exhibit 3.01(ii) to the Company's 10-Q
         for the fiscal quarter ended December 31, 1997 (File No. 1-1822).
 4.3*    Rights Agreement, filed as Exhibit 1 to Form 8-A Registration
         Statement dated April 3, 1996 (File No. 1-1822).
 4.4*    Mortgage and Deed of Trust, dated as of February 1, 1945; filed as
         Exhibit 7-A to Registration Statement No. 2-5586.
</TABLE>
 
                                      II-2
<PAGE>
 
<TABLE>
<CAPTION>
 Exhibit
 Number                                  Exhibit
 -------                                 -------
 <C>     <S>
 4.5*    Fourteenth Supplemental Indenture, dated as of October 26, 1976; filed
         on June 26, 1979 as Exhibit b-4 to Registration Statement No. 2-64857.
 4.6*    Eighteenth Supplemental Indenture, dated as of November 15, 1989;
         filed as Exhibit 28(b) to the Registration Statement No. 33-38413.
 4.7*    Nineteenth Supplemental Indenture, dated as of May 15, 1991; filed on
         May 16, 1991 as Exhibit 4.01 to the Company's Form 8-K (File No. 1-
         1822).
 4.8*    Twentieth Supplemental Indenture, dated as of November 1, 1992; filed
         on November 4, 1992 as Exhibit 4.01 to the Company's Form 8-K (File
         No. 1-1822).
 4.9*    Twenty-First Supplemental Indenture, dated as of May 1, 1993; filed on
         May 13, 1993 as Exhibit 4.01 to the Company's Form 8-K (File No. 1-
         1822).
 4.10*   Twenty-Second Supplemental Indenture, dated as of November 15, 1995;
         filed on December 3, 1995 as Exhibit 4.01 to the Company's Form 8-K
         (File No. 1-1822).
 4.11*   Twenty-Third Supplemental Indenture, dated as of October 15, 1997;
         filed on November 6, 1997 as Exhibit No. 4.01 to the Company's Form 8-
         K (File No. 1-1822).
 5       Opinion of Gerald T. McNeive, Jr., Senior Vice President-Finance and
         General Counsel.
 23(a)   Consent of Gerald T. McNeive, Jr. (included in Exhibit 5 filed
         herewith).
 23(b)   Consent of Deloitte & Touche LLP.
 24      Power of Attorney.
</TABLE>
- --------
*  Incorporated herein by reference.
 
Item 17. Undertakings.
 
      The undersigned registrant hereby undertakes:
 
      (1) That, for purposes of determining any liability under the Securities
Act of 1933, each filing of the registrant's annual report pursuant to section
13(a) or 15(d) of the Securities Exchange Act of 1934 that is incorporated by
reference in the registration statement shall be deemed to be a new
registration statement relating to the securities offered therein, and the
offering of such securities at that time shall be deemed to be the initial bona
fide offering thereof.
 
      (2) For purposes of determining any liability under the Securities Act of
1933, the information omitted from the form of prospectus filed as part of this
registration statement in reliance upon Rule 430A and contained in a form of
prospectus filed by the registrant pursuant to Rule 424(b)(1) or (4) or 497(h)
under the Securities Act shall be deemed to be part of this registration
statement as of the time it was declared effective.
 
      (3) For the purpose of determining any liability under the Securities Act
of 1933, each post-effective amendment that contains a form of prospectus shall
be deemed to be a new registration statement relating to the securities offered
therein, and the offering of such securities at that time shall be deemed to be
the initial bona fide offering thereof.
 
      Insofar as indemnification for liabilities arising under the Securities
Act of 1933 may be permitted to directors, officers and controlling persons of
the registrant pursuant to the foregoing provisions, or otherwise, the
registrant has been advised that in the opinion of the Securities and Exchange
Commission such indemnification is against public policy as expressed in the
Act and is, therefore, unenforceable. In the event that a claim for
indemnification against such liabilities (other than the payment by the
registrant of expenses incurred or paid by a director, officer or controlling
person of the registrant in the successful defense of any
 
                                      II-3
<PAGE>
 
action, suit or proceeding) is asserted by such director, officer or
controlling person in connection with the securities being registered, the
registrant will, unless in the opinion of its counsel the matter has been
settled by controlling precedent, submit to a court of appropriate jurisdiction
the question whether such indemnification by it is against public policy as
expressed in the Act and will be governed by the final adjudication of such
issue.
 
                                      II-4
<PAGE>
 
                                   SIGNATURES
 
      Pursuant to the requirements of the Securities Act of 1933, the
registrant certifies that it has reasonable grounds to believe that it meets
all the requirements for filing on Form S-3 and has duly caused this
registration statement to be signed on its behalf by the undersigned, thereunto
duly authorized, in the City of St. Louis, and State of Missouri, on the
fifteenth day of March, 1999.
 
                                          LACLEDE GAS COMPANY
 
                                                  /s/ G.T. McNeive, Jr.
                                          By:__________________________________
                                                 Gerald T. McNeive, Jr.
                                            Senior Vice President-Finance and
                                                     General Counsel
 
      Pursuant to the requirements of the Securities Act of 1933, this
registration statement has been signed below by the following persons in the
capacities and on the dates indicated.
 
<TABLE>
<CAPTION>
                Name                             Title                    Date
                ----                             -----                    ----
<S>                                  <C>                           <C>
           *D. H. Yaeger             Chairman of the Board,          March 15, 1999
____________________________________ President, Chief Executive
           (D. H. Yaeger)            Officer and Director
 
       /s/ G. T. McNeive, Jr.        Senior Vice President-          March 15, 1999
____________________________________ Finance and General Counsel
        (G. T. McNeive, Jr.)         (Principal Financial
                                     Officer)
         /s/ J. A. Fallert           Controller                      March 15, 1999
____________________________________
          (J. A. Fallert)
           *R. E. Beumer             Director                        March 15, 1999
____________________________________
           (R. E. Beumer)
         *A. B. Craig, III           Director                        March 15, 1999
____________________________________
         (A. B. Craig, III)
             *H. Givens              Director                        March 15, 1999
____________________________________
            (H. Givens)
           *C. R. Holman             Director                        March 15, 1999
____________________________________
           (C. R. Holman)
           *R. C. Jaudes             Retired, Chairman of the        March 15, 1999
____________________________________ Board and Director
           (R. C. Jaudes)
            *M. A. Krey              Director                        March 15, 1999
____________________________________
            (M. A. Krey)
</TABLE>
 
                                      II-5
<PAGE>
 
 
<TABLE>
<S>                                  <C>                           <C>
           *W. E. Nasser             Director                        March 15, 1999
____________________________________
           (W. E. Nasser)
 
            *R. P. Stupp             Director                        March 15, 1999
____________________________________
           (R. P. Stupp)

          *H. E. Trusheim            Director                        March 15, 1999
____________________________________
          (H. E. Trusheim)
 
      
      /s/ G. T. McNeive, Jr. 
*By: _______________________________                                 March 15, 1999
         G. T. McNeive, Jr.
         (Attorney-in-Fact)
</TABLE>
 
                                      II-6
<PAGE>
 
                               INDEX TO EXHIBITS.
 
<TABLE>
<CAPTION>
 Exhibit
 Number                                  Exhibit
 -------                                 -------
 <C>     <S>
 1.1     Form of Underwriting Agreement for Common Stock.
 4.1*    Articles of Incorporation of Laclede Gas Company as of February 11,
         1994, filed on February 22, 1994 as Exhibit 4(b) to the Company's
         Registration Statement No. 33-52357.
 4.2*    By-Laws of Laclede Gas Company effective January 26, 1995; filed as
         Exhibit 4.2 to the Company's Registration Statement No. 33-58757.
 4.2(a)* Amendment to the Company's By-Laws, effective at the close of business
         on July 24, 1997; filed as Exhibit 3.01 to the Company's 10-Q for the
         fiscal quarter ended June 30, 1997 (File No. 1-1822).
 4.2(b)* Amendment to the Company's By-Laws, effective at the close of business
         on November 20, 1997; filed as Exhibit 3.01(ii) to the Company's 10-Q
         for the fiscal quarter ended December 31, 1997 (File No. 1-1822).
 4.3*    Rights Agreement, filed as Exhibit 1 to Form 8-A Registration
         Statement dated April 3, 1996 (File No. 1-1822).
 4.4*    Mortgage and Deed of Trust, dated as of February 1, 1945; filed as
         Exhibit 7-A to Registration Statement No. 2-5586.
 4.5*    Fourteenth Supplemental Indenture, dated as of October 26, 1976; filed
         on June 26, 1979 as Exhibit b-4 to Registration Statement No. 2-64857.
 4.6*    Eighteenth Supplemental Indenture, dated as of November 15, 1989;
         filed as Exhibit 28(b) to the Registration Statement No. 33-38413.
 4.7*    Nineteenth Supplemental Indenture, dated as of May 15, 1991; filed on
         May 16, 1991 as Exhibit 4.01 to the Company's Form 8-K (File No. 1-
         1822).
 4.8*    Twentieth Supplemental Indenture, dated as of November 1, 1992; filed
         on November 4, 1992 as Exhibit 4.01 to the Company's Form 8-K (File
         No. 1-1822).
 4.9*    Twenty-First Supplemental Indenture, dated as of May 1, 1993; filed on
         May 13, 1993 as Exhibit 4.01 to the Company's Form 8-K (File No. 1-
         1822).
 4.10*   Twenty-Second Supplemental Indenture, dated as of November 15, 1995;
         filed on December 3, 1995 as Exhibit 4.01 to the Company's Form 8-K
         (File No. 1-1822).
 4.11*   Twenty-Third Supplemental Indenture, dated as of October 15, 1997;
         filed on November 6, 1997 as Exhibit No. 4.01 to the Company's Form 8-
         K (File No. 1-1822).
 5       Opinion of Gerald T. McNeive, Jr., Senior Vice President-Finance and
         General Counsel.
 23(a)   Consent of Gerald T. McNeive, Jr. (included in Exhibit 5 filed
         herewith).
 23(b)   Consent of Deloitte & Touche LLP.
 24      Power of Attorney.
</TABLE>
- --------
* Incorporated herein by reference.
 
                                      II-7

<PAGE>
 
                                                                     EXHIBIT 1.1


                            UNDERWRITING AGREEMENT
                            ----------------------

                              LACLEDE GAS COMPANY

                                  Common Stock

                                 May [__], 1999

MERRILL LYNCH & CO.
Merrill Lynch, Pierce, Fenner & Smith
          Incorporated
A.G. EDWARDS & SONS, INC.

As Representatives of the several
Underwriters named in Schedule I hereto

c/o  Merrill Lynch & Co.
     World Financial Center
     North Tower
     New York, New York 10281

Ladies and Gentlemen:

     Laclede Gas Company, a Missouri corporation (the "Company"), proposes,
subject to the terms and conditions stated herein, to issue and sell severally
to you (the "Representatives") and the other several Underwriters named in
Schedule I hereto (collectively, including any underwriter substituted as
hereinafter provided in Section 4 hereof, the "Underwriters") the aggregate
number of shares of the Common Stock, par value $1 per share, of the Company
("Common Stock") set forth on Schedule I hereto (the "Firm Shares"). The Company
also proposes, subject to the terms and conditions stated herein, to issue and
sell severally to the Underwriters not more than an additional 150,000 shares of
Common Stock ("Option Shares"), if and to the extent that the Representatives,
on behalf of the Underwriters, shall have determined to exercise the right to
purchase Option Shares pursuant to Section 2(c) hereof. As used herein, the term
"Securities" shall mean, collectively, the Firm Shares and Option Shares.
<PAGE>
 
1. Representations and Warranties of the Company. The Company represents and
   --------------------------------------------- 
warrants to, and agrees with, each of the Underwriters that:

          (a) A registration statement on Form S-3 (File No. 333-[_____]) with
     respect to the Securities has been prepared by the Company in conformity
     with the requirements of the Securities Act of 1933, as amended (the
     "Act"), and the rules and regulations of the Securities and Exchange
     Commission (the "Commission") under the Act (the "Regulations"), has been
     filed with the Commission and has become effective. The Company meets the
     requirements for the use of Form S-3 under the Act. Copies of such
     registration statement, together with all amendments, if any, and the
     prospectus contained therein, in the form in which it became effective,
     including the documents incorporated in such prospectus by reference, have
     heretofore been delivered to the Underwriters. Such registration statement
     in the form in which it most recently became effective, including all
     exhibits thereto and the information deemed to be a part thereof pursuant
     to Rule 430A(b) of the Regulations, is referred to hereinafter as the
     "Registration Statement." The prospectus, including the documents
     incorporated therein by reference, contained in the Registration Statement
     is referred to hereinafter as the "Prospectus"; provided, however, that, as
     used in this Agreement (except in this Section 1), upon the completion of
     the Prospectus on or after the date hereof (whether by filing the
     Prospectus as so completed with the Commission pursuant to Rule 424(b) of
     the Regulations or an amendment to the Registration Statement with the
     Commission under the Act in accordance with Rule 430A of the Regulations or
     as a result of any other revision thereof or supplement thereto provided to
     the Underwriters for use in connection with the offering of the Securities
     that differs from the Prospectus on file with the Commission at the time
     the Registration Statement became effective, whether or not such revision
     or supplement is required to be filed with the Commission pursuant to Rule
     424(b) of the Regulations), the term "Prospectus" shall mean the Prospectus
     as so completed (the "Completed Prospectus"). All references in this
     Agreement to amendments or supplements to the Registration Statement, the
     Prospectus or the Completed Prospectus shall be deemed to mean and include
     the filing of any document under the Securities Exchange Act of 1934, as
     amended (the "Exchange Act"), after the date of this Agreement that is or
     is deemed to be incorporated by reference in the Prospectus; all references
     to the Registration Statement, the Prospectus or the Completed Prospectus,
     or any amendment or supplement to any of the foregoing, shall be deemed to
     include the copy filed with the Commission pursuant to its Electronic Data
     Gathering, Analysis and Retrieval system ("EDGAR").

          (b) No stop order with respect to the Registration Statement has been
     issued by the Commission under the Act and no proceeding therefor is
     pending before, or to the knowledge of the Company threatened by, the
     Commission; the Registration Statement, at the time it became effective,
     complied in all material respects with the requirements of the Act and the
     Regulations and did not contain an untrue statement of a material fact or
     omit to state a material fact required to be stated therein or necessary to
     make the statements therein not misleading; the Prospectus, on the date
     hereof, and the Completed Prospectus, at the time it is filed with the
     Commission pursuant to Rule 424(b) of the 

                                       2
<PAGE>
 
     Regulations or first used and at the Time of Delivery and an Option Shares
     Time of Delivery (each as defined in Section 4 hereof), as the case may be,
     complied in all material respects with the requirements of the Act and the
     Regulations and neither the Prospectus, on the date hereof, nor the
     Completed Prospectus, at any such times, contains or will contain an untrue
     statement of a material fact or omits or will omit to state a material fact
     required to be stated therein or necessary to make the statements therein,
     in the light of the circumstances under which they were made, not
     misleading; and each document incorporated by reference in the Prospectus,
     at the time it was or will be filed with the Commission under the Exchange
     Act, conformed or will conform when so filed in all material respects to
     the requirements of the Exchange Act and the rules and regulations of the
     Commission thereunder (the "Exchange Act Regulations"); provided, however,
     that the representations and warranties contained in this Section 1(b)
     shall not apply to statements in or omissions from the Registration
     Statement or the Prospectus made in reliance upon and in conformity with
     information furnished in writing to the Company, through the
     Representatives by any Underwriter, expressly for use in the Registration
     Statement or the Prospectus.

          (c) Since the respective dates as of which information is given in the
     Prospectus, there has not been any material adverse change in the
     condition, financial or otherwise, or in the earnings, business affairs or
     business prospects of the Company and its subsidiaries taken as a whole and
     there has not been any material transaction entered into by the Company,
     other than transactions in the ordinary course of business and transactions
     referred to in, or contemplated by, the Prospectus; and the Company does
     not have any material contingent obligation that is not disclosed in the
     Prospectus.

          (d) Neither the Company or any of its subsidiaries is, or with the
     giving of notice or the lapse of time or both would be, in breach of any of
     the terms and provisions of, or in default under, nor will the consummation
     by the Company of the transactions herein contemplated or the fulfillment
     of the terms hereof result in a breach of any of the terms or provisions
     of, or constitute a default under, the Articles of Incorporation or By-Laws
     of the Company, each as amended, or any statute, indenture, mortgage, deed
     of trust or other agreement or instrument to which the Company is a party
     or by which it is bound or to which any of the property of the Company is
     subject, or any order, rule or regulation applicable to the Company of any
     court or governmental agency or body having jurisdiction over the Company
     or any of its properties, nor will any such action result in the creation
     or imposition of any lien, charge or encumbrance upon any property or
     assets of the Company or any of its subsidiaries pursuant to the terms of
     any such agreement or instrument; the State of Missouri Public Service
     Commission (the "MPSC") has issued an order or orders authorizing the
     issuance and sale of the Securities, which order is, or orders are, in full
     force and effect; and no other approval, authorization, consent or order of
     any public board or body is legally required for the issuance and sale of
     the Securities by the Company hereunder, except such as may be required
     under the Act or state securities laws.

          (e) The financial statements, together with related notes,
     incorporated by reference in the Prospectus present fairly the financial
     position and the results of 

                                       3
<PAGE>
 
     operations of the Company on the bases set forth in such statements and
     related notes at the dates or for the periods to which they apply; such
     statements and related notes have been prepared in accordance with
     generally accepted principles of accounting, consistently applied
     throughout the periods involved, except as otherwise stated therein; and
     the supporting schedule incorporated by reference in the Prospectus
     presents fairly the information required to be stated therein.

          (f) The Company is a validly organized and existing corporation in
     good standing under the laws of the State of Missouri, with full power and
     authority to own or lease its properties and conduct its business as
     described in the Prospectus; each of the Company's subsidiaries has been
     duly incorporated and is validly existing as a corporation in good standing
     under the laws of the jurisdiction of its incorporation, with full power
     and authority to own or lease its properties and conduct its business; and
     each of the Company and its subsidiaries is duly qualified to do business
     and is in good standing in each jurisdiction in which the character of the
     business conducted by it or the location of the properties owned or leased
     by it makes such qualification necessary, except where the failure to so
     qualify would not have a material adverse effect in the condition,
     financial or otherwise, or in the earnings, business affairs or business
     prospects of the Company and its subsidiaries taken as a whole.

          (g) The authorized, issued and outstanding capital stock of the
     Company is as set forth in the Prospectus (except for changes that the
     Registration Statement discloses have occurred or may occur or that were
     occasioned by the declaration of dividends and for Common Stock offered
     under the Company's shareholder and employee plans, including, without
     limitation, the Company's Dividend Reinvestment and Stock Purchase Plan);
     all of the outstanding shares of the capital stock of the Company (other
     than the Securities) have been duly and validly authorized and issued and
     are fully paid and non-assessable; when the Securities shall have been
     delivered against payment therefor as provided herein, they will have been
     duly and validly authorized and issued and fully paid and non-assessable
     and entitled to the rights set forth in the Company's Articles of
     Incorporation, as amended, and the Rights Agreement dated as of April 3,
     1996 between the Company and UMB Bank, National Association (formerly 
     Boatmen's Trust Company), as rights agent thereunder; other
     than as set forth in the Prospectus, there are no preemptive rights or
     other rights to subscribe for or to purchase, or any restriction upon the
     voting or transfer of, any shares of Common Stock pursuant to the Articles
     of Incorporation or By-Laws of the Company, each as amended, or other
     agreement or instrument to which the Company is a party or by which it is
     bound or to which any of the property of the Company is subject; and the
     Common Stock, including the Securities, conforms to the description thereof
     contained in the Prospectus.

          (h) No labor dispute with any employees of the Company or any of its
     subsidiaries exists or, to the knowledge of the Company, is imminent, and
     the Company is not aware of any existing or imminent labor disturbance by
     the employees of any of its principal suppliers, manufacturers or
     contractors, which labor dispute or disturbance in each case might
     reasonably be expected to result in any material adverse change in the

                                       4
<PAGE>
 
     condition, financial or otherwise, or in the earnings, business affairs or
     business prospects of the Company and its subsidiaries taken as a whole.

          (i) Other than as set forth in the Prospectus, there are no legal,
     governmental or administrative proceedings pending to which the Company is
     a party or of which any property of the Company is the subject, the outcome
     of which, singly or in the aggregate, might reasonably be expected to
     result in any material adverse change in the condition, financial or
     otherwise, or in the earnings, business affairs or business prospects of
     the Company and its subsidiaries taken as a whole; and, to the best of the
     Company's knowledge, no such proceedings are threatened or contemplated by
     governmental authorities or threatened by others.

          (j) The Company and its subsidiaries have all valid material
     franchises, licenses and permits as are required for the conduct of their
     business as now conducted, and no franchise, license or permit is subject
     to any deficiency, exception, restriction, condition or limitation, except
     deficiencies, exceptions, restrictions, conditions and limitations that do
     not materially adversely affect the conduct, business and operation of the
     Company and its subsidiaries taken as a whole; and the Company and its
     subsidiaries have complied with such terms and provisions of franchises,
     licenses and permits the non-compliance with which would materially
     adversely affect the conduct, business and operation of the Company and its
     subsidiaries taken as a whole.

          (k) To the knowledge of the Company, no person or corporation that is
     a "holding company" or a "subsidiary of a holding company" within the
     meaning of the Public Utility Holding Company Act of 1935, as amended,
     directly or indirectly owns, controls or holds with power to vote ten
     percent or more of the outstanding voting securities of the Company.

          (l) The Company and its subsidiaries possess such certificates,
     authorities or permits issued by the appropriate state, federal or foreign
     regulatory agencies or bodies necessary to conduct the business now
     operated by them, and neither the Company nor any of its subsidiaries has
     received any notice of any proceedings relating to the revocation or
     modification of any such certificate, authority or permit that, singly or
     in the aggregate, if the subject of an unfavorable decision, ruling or
     finding, might reasonably be expected to materially and adversely affect
     the condition, financial or otherwise, or the earnings, business affairs or
     business prospects of the Company and its subsidiaries taken as a whole.

     2.  Purchase and Sale.
         ----------------- 

     (a) On the basis of the representations and warranties herein contained and
subject to the terms and conditions herein set forth, the Company agrees to sell
to each of the Underwriters, and each of the Underwriters agrees, severally and
not jointly, to purchase from the Company, at a purchase price of $[_____] per
share, the number of Firm Shares set forth opposite the name of such Underwriter
in Schedule I hereto.

     (b) In addition, for the sole purpose of covering over-allotments in
connection with the sale of the Firm Shares, the Company agrees to grant to the
Underwriters an option to purchase 

                                       5
<PAGE>
 
from the Company the number of Option Shares set forth in the notice referred to
in Section 2(c) hereof (the "Option"). If the Option is exercised by the
Underwriters, on the basis of the representations and warranties herein
contained and subject to the terms and conditions herein set forth, the Company
agrees to sell to each of the Underwriters, and each of the Underwriters agrees,
severally and not jointly, to purchase from the Company, at a purchase price of
$[_____] per share, the number of Option Shares (subject to such adjustments as
the Representatives may determine in order to avoid fractional shares) that
bears the same proportion to the aggregate number of Option Shares to be
purchased as the number of Firm Shares set forth opposite the name of such
Underwriter in Schedule I hereto bears to the aggregate number of Firm Shares.

     (c) The Option may be exercised, in whole or in part from time to time,
within the period of 30 days from the date hereof, by written notice from the
Representatives, on behalf of the Underwriters, to the Company. Such notice
shall set forth the aggregate number of Option Shares as to which the Option is
being exercised and the date of delivery of, and payment for, such Option
Shares, which date shall be neither earlier than the later of the Time of
Delivery and the second Business Day (as defined below) after the date of such
exercise nor later than the seventh Business Day after the date of such
exercise. As used herein, "Business Day" shall mean any day on which the New
York Stock Exchange (the "NYSE") and banks in the City of New York are open.

     3.  Offering. Subject to the terms and conditions herein set forth, the
         -------- 
Underwriters will make a public offering of the Securities upon the terms and
conditions set forth in the Prospectus.

     4.  Payment and Delivery; Defaulting Underwriters. Delivery of the Firm
         --------------------------------------------- 
Shares, against payment therefor in immediately available funds by wire
transfer, shall be made at the offices of Winthrop, Stimson, Putnam & Roberts,
One Battery Park Plaza, New York, New York, at 10:00 A.M., New York City time,
on the third Business Day after the date hereof, unless the price referred to in
Section 2(a) hereof is determined after 4:30 P.M., New York City time on the
date hereof, in which case on the fourth Business Day after the date hereof, or
at such other place, time and date as shall be agreed upon in writing by the
Company and the Representatives. The hour and date of such delivery and payment
are herein called the "Time of Delivery."

     The Firm Shares shall be delivered to the Underwriters, for their
respective accounts in fully registered form, in such authorized denominations
and registered in such names as the Representatives may reasonably request in
writing not later than 2:00 P.M., New York City time, on the second Business Day
after the date hereof, or to the extent not so requested, registered in the
respective names of the Underwriters in such authorized denominations as the
Company shall determine. The Company agrees to make the certificates for the
Firm Shares available to the Representatives for checking purposes not later
than 2:00 P.M., New York City time, on the last full Business Day preceding the
Time of Delivery, at the offices of The Depository Trust Company, New York, New
York, or at such other place, time or date as may be agreed upon between the
Company and the Representatives.

     Delivery of any Option Shares, against payment therefor in immediately
available funds by wire transfer, shall be made at the offices of Winthrop,
Stimson, Putnam & Roberts, One 

                                       6
<PAGE>
 
Battery Park Plaza, New York, New York, at 10:00 A.M., New York City time, on
the date specified by the Representatives in accordance with Section 2(c)
hereof, or at such other place, time and date as shall be agreed upon in writing
by the Company and the Representatives. The hour and date of any such delivery
and payment are herein called an "Option Shares Time of Delivery."

     Option Shares shall be delivered to the Underwriters, for their respective
accounts in fully registered form, in such authorized denominations and
registered in such names as the Representatives may reasonably request in
writing not later than 2:00 P.M., New York City time, on the second Business Day
preceding the Option Shares Time of Delivery with respect to such Option Shares,
or to the extent not so requested, registered in the respective names of the
Underwriters in such authorized denominations as the Company shall determine.
The Company agrees to make the certificates for such Option Shares available to
the Representatives for checking purposes not later than 2:00 P.M., New York
City time, on the last full Business Day preceding such Option Shares Time of
Delivery, at the offices of The Depository Trust Company, New York, New York, or
at such other place, time or date as may be agreed upon between the Company and
the Representatives.

     If any one or more of the Underwriters shall default on its obligation or
their obligations to purchase and pay for the Securities that it has or they
have agreed herein to purchase and pay for (such Underwriter or Underwriters
that shall have so defaulted being referred to herein as the "Defaulting
Underwriters"), the Company shall immediately give written notice of such
default to the Representatives and the Underwriters that shall not have so
defaulted (the "Non-defaulting Underwriters") shall have the right, within 24
hours after the receipt of such notice by the Representatives, to determine to
purchase or to procure one or more others, which shall be members of the
National Association of Securities Dealers, Inc. (the "NASD") and reasonably
satisfactory to the Company, to purchase, upon the terms herein set forth, all
(but not less than all) of the Securities that the Defaulting Underwriters so
agreed to purchase (the "Defaulted Securities"). If the Non-defaulting
Underwriters shall determine to exercise such right, the Representatives shall
give notice to the Company of such determination within 24 hours after their
receipt of notice from the Company of such default. If the Representatives shall
fail to give such notice or, within such 24-hour period, shall give notice to
the Company that the Non-defaulting Underwriters will not exercise such right,
then the Company shall have the right, within a further 24 hours after the
failure of the Representatives to give such notice or within 24 hours after its
receipt of such notice from the Representatives, to procure one or more others,
which shall be members of the NASD and reasonably satisfactory to the
Representatives, to purchase, upon the terms herein set forth, all (but not less
than all) of the Defaulted Securities. In the event that the Non-defaulting
Underwriters or the Company shall have arranged for the purchase of the
Defaulted Securities as provided above, then either the Company or the
Representatives shall have the right to postpone the Time of Delivery or an
Options Shares Time of Delivery, as the case may be, for such period, not
exceeding three Business Days, in order that the required changes in the
Registration Statement, the Prospectus and any other documents or arrangements
may be effected. In the event that neither the Non-defaulting Underwriters nor
the Company shall have arranged for the purchase of the Defaulted Securities as
provided above, then:

                                       7
<PAGE>
 
          (a) if the Defaulted Securities do not exceed 10% of the Securities
     that the Non-defaulting Underwriters have otherwise agreed to purchase, the
     Non-defaulting Underwriters shall be obligated to purchase and pay for the
     respective amounts of the Securities that they have severally agreed to
     purchase hereunder and, in addition, to purchase and pay for (in proportion
     to their respective obligations hereunder except as may be otherwise
     determined by the Non-defaulting Underwriters) the Defaulted Securities; or

          (b) if the Defaulted Securities exceed 10% of the Securities that the
     Non-defaulting Underwriters have otherwise agreed to purchase, this
     Agreement shall terminate.

     Termination of this Agreement pursuant to this Section 4 shall not relieve
any of the Defaulting Underwriters from liability in respect of its obligations
under this Agreement, but shall be without liability on the part of the Company
and the Non-defaulting Underwriters; provided, however, that such termination
shall not affect the payment obligations set forth in Section 5 hereof.

     5.  Covenants of the Company. The Company agrees with each of the
         ------------------------ 
Underwriters that it will:

          (a) Promptly deliver to the Representatives a copy of each of the
     Registration Statement and all amendments thereto (in each case including
     copies of all documents (other than exhibits) incorporated in the
     Prospectus by reference and all exhibits filed therewith), either signed or
     certified by an officer of the Company, and including a copy of each
     consent and opinion included therein or filed as an exhibit thereto, either
     signed or certified by an officer of the Company, and as many unsigned
     copies of the Registration Statement and such amendments, as the
     Representatives may reasonably request. The Company also will deliver to
     the Representatives as soon as possible after the date of this Agreement
     and thereafter from time to time, during such period of time as a
     prospectus relating to the Securities is required to be delivered under the
     Act, as many copies of the Prospectus, including any amendments or
     supplements thereto, as the Representatives may reasonably request for the
     purposes of the Act. The copies of the Registration Statement and all
     amendments thereto, and the copies of the Prospectus, including any
     amendments or supplements thereto, that are furnished to the
     Representatives will be identical to the electronically transmitted copies
     thereof filed with the Commission pursuant to EDGAR, except to the extent
     permitted by Regulation S-T.

          (b) Promptly advise the Representatives (i) when any amendment of the
     Registration Statement shall have become effective, (ii) of any request by
     the Commission for any amendment of the Registration Statement or the
     Prospectus and (iii) of the issuance of any stop order under the Act with
     respect to the Registration Statement or the institution of any proceedings
     therefor of which the Company shall have received notice. The Company will
     use its best efforts to prevent the issuance of any such stop order and, if
     issued, to secure the prompt removal thereof. The Company will neither file

                                       8
<PAGE>
 
     nor use any amendment or supplement to the Registration Statement or the
     Prospectus to which the Representatives or counsel for the Underwriters
     shall object.

          (c) Pay all expenses incident to the performance of its obligations
     under this Agreement, including (i) the preparation and filing by it of the
     Registration Statement and the Prospectus, (ii) the preparation and
     delivery of this Agreement, (iii) the corporate and regulatory actions
     precedent to the issuance and delivery of the Securities, (iv) the issuance
     and delivery of the Securities, (v) the fees and disbursements of the
     Company's counsel and accountants, (vi) except as provided in Section 5(d)
     hereof, the printing and delivery to the Underwriters of reasonable
     quantities of the Registration Statement, the Prospectus and any amendment
     or supplement thereto, (vii) the fees and expenses of any transfer agent
     and registrar, (viii) the qualification of the Securities for offering and
     sale under state securities laws, including the fees, not to exceed $5,000,
     and disbursements of counsel for the Underwriters in connection with such
     qualification and blue sky surveys relating thereto, (ix) the fees and
     expenses in connection with the listing of the Securities on the NYSE and
     the Chicago Stock Exchange and (x) the filing fees incident to any required
     review by the NASD of the terms of the sale of the Securities.

          (d) During such period of time (not exceeding nine months) after the
     effective date of the Registration Statement as a prospectus relating to
     the Securities is required to be delivered under the Act, if (i) any event
     shall occur as a result of which it is necessary, in the opinion of the
     Company and its counsel or the Representatives and counsel for the
     Underwriters, to amend or supplement the Prospectus in order to make the
     Prospectus not misleading, in the light of then existing circumstances, or
     (ii) it shall be necessary to amend or supplement the Registration
     Statement or the Prospectus to comply with the Act or the Regulations or
     the Exchange Act or the Exchange Act Regulations, forthwith, at its
     expense, prepare and furnish to the Representatives a reasonable number of
     copies of a supplement or an amendment to the Prospectus that will
     supplement or amend the Prospectus so that as so supplemented or amended it
     will not contain any untrue statement of a material fact or omit to state
     any material fact necessary in order to make the statements therein, in the
     light of then existing circumstances, not misleading or it will comply with
     the Act or the Regulations or the Exchange Act or the Exchange Act
     Regulations. In case any of the Underwriters shall be required to deliver a
     prospectus relating to the Securities after the expiration of nine months
     from the date of this Agreement, the Company, upon the request of the
     Representatives, will furnish to the Underwriters, at the expense of the
     Underwriters, a reasonable quantity of a supplemented or amended
     prospectus, or supplements or amendments to the Prospectus, complying with
     Section 10(a) of the Act.

          (e) Make generally available to its security holders, as soon as
     practicable, an earning statement (which need not be audited) covering a
     period of 12 months beginning on the first day of the Company's fiscal
     quarter next succeeding the effective date of the Registration Statement
     that will satisfy the provisions of Section 11(a) of the Act (including
     Rule 158 of the Regulations).

                                       9
<PAGE>
 
          (f) Furnish such proper information as may be lawfully required and
     otherwise cooperate in qualifying the Securities for offer and sale under
     the securities or blue sky laws of such jurisdictions as the
     Representatives may reasonably designate, and file and make such statements
     or reports as are or may be required by the laws of such jurisdictions;
     provided, however, that the Company shall not be required to qualify as a
     foreign corporation or dealer in securities or to file any consents to
     service of process under the laws of any jurisdiction.

          (g) Except for sales of Common Stock pursuant to its shareholder and
     employee plans (including, without limitation, the Company's Dividend
     Reinvestment and Stock Purchase Plan), during the period beginning on the
     date of this Agreement and continuing to and including the 120th day
     following the Time of Delivery, not sell, offer to sell, grant any option
     for the sale of, or otherwise dispose of, any Common Stock or any security
     convertible into Common Stock without the prior consent of the
     Representatives.

     All fees and disbursements of counsel for the Underwriters (exclusive of
fees and expenses of such counsel that are to be paid by the Company as set
forth in clause (viii) of Section 5(c) hereof) shall be paid by the
Underwriters; provided, however, that if this Agreement shall be terminated in
accordance with the provisions of Section 6, 7, 8 or 10 hereof, the Company
shall reimburse the Underwriters for their out-of-pocket costs and expenses,
including the reasonable fees and disbursements of counsel for the Underwriters.
The Company shall not be required to pay any amount for any expenses of the
Underwriters except as provided in the preceding sentence. The Company shall not
in any event be liable to any of the Underwriters for damages on account of the
loss of anticipated profits.

     6.  Conditions of Obligations of the Underwriters to Purchase the Firm
         ------------------------------------------------------------------
Shares. The several obligations of the Underwriters to purchase and pay for the
- ------ 
Firm Shares shall be subject to the accuracy of the representations and
warranties of the Company set forth in Section 1 hereof as of the date hereof,
to the accuracy of the statements of officers of the Company made in any
certificate given pursuant to the provisions hereof, to the performance by the
Company of its obligations hereunder to be performed at or prior to the Time of
Delivery, and to the following additional conditions:

          (a) (i) No stop order suspending the effectiveness of the Registration
     Statement shall be in effect at the Time of Delivery and no order of the
     Commission directed to the adequacy or accuracy of any document
     incorporated by reference in the Prospectus shall be in effect at such
     date; no proceedings for any such purpose shall be pending before, or
     threatened by, the Commission at the Time of Delivery; if the Completed
     Prospectus is required to be filed with the Commission pursuant to Rule
     424(b) of the Regulations, the Completed Prospectus shall have been filed
     in the manner and within the time period required by Rule 424(b) of the
     Regulations and the Company shall have provided evidence reasonably
     satisfactory to the Representatives thereof; and the Representatives shall
     have received a certificate dated the Time of Delivery and signed by an
     executive officer of the Company to the effect that no such order is in
     effect and that no proceedings for any such purpose are pending before, or
     to the knowledge of the Company threatened by, the Commission; (ii) there
     shall not have been any change in the 

                                       10
<PAGE>
 
     matters described in the letter furnished pursuant to Section 6(d) hereof
     the effect of which would, in the opinion of the Representatives,
     materially and adversely affect the market for the Firm Shares; (iii) there
     shall not have been, since the respective dates as of which information is
     given in the Registration Statement and the Prospectus (or any amendment or
     supplement thereto), except as may otherwise be stated in the Registration
     Statement and the Prospectus (or any amendment or supplement thereto), any
     material adverse change in the condition, financial or otherwise, or in the
     earnings, business affairs or business prospects of the Company and its
     subsidiaries taken as a whole; and (iv) the Company and its subsidiaries
     shall not have any liabilities or obligations, direct or contingent
     (whether or not in the ordinary course of business), that are material to
     the Company and its subsidiaries taken as a whole, other than those
     reflected in the Registration Statement or the Prospectus (or any amendment
     or supplement thereto).

          (b) At the Time of Delivery, there shall be in full force and effect
     an order or orders of the MPSC authorizing the issuance and sale of the
     Securities on the terms and conditions herein set forth, and containing no
     provision unacceptable to the Representatives by reason of the fact that it
     is materially adverse to the Company (it being understood that no order in
     effect on the date hereof contains any such unacceptable provision).

          (c) At the Time of Delivery, the Representatives shall have received
     from Gerald T. McNeive, Jr., Esq., Senior Vice President--Finance and
     General Counsel of the Company, and Winthrop, Stimson, Putnam & Roberts,
     counsel for the Underwriters, opinions, dated the Time of Delivery, in
     substantially the form and substance prescribed in Exhibits A and B,
     respectively, hereto.

          (d) At the date of this Agreement, Deloitte & Touche LLP shall have
     furnished to the Representatives a letter, dated the date of this
     Agreement, to the effect that:

               (i) they are independent public accountants with respect to the
        Company within the meaning of the Act and the Regulations;

               (ii) in their opinion, the consolidated financial statements
        examined by them and incorporated by reference in the Prospectus comply
        as to form in all material respects with the applicable accounting
        requirements of the Act and the Regulations and the Exchange Act and the
        Exchange Act Regulations;

               (iii)  on the basis of limited procedures, not constituting an
        examination made in accordance with generally accepted auditing
        standards, including a reading of the unaudited consolidated financial
        information incorporated by reference in the Prospectus, the latest
        available interim financial statements of the Company, if any, a reading
        of the minute books of the shareholders and the Board of Directors of
        the Company since the close of the Company's most recent fiscal year
        through a specified date not more than five days prior to the date of
        such letter, inquiries of officials of the Company responsible for
        financial and accounting matters and such other inquiries and procedures
        as may be specified in such letter, nothing came to 

                                       11
<PAGE>
 
        their attention that caused them to believe that (A) (1) any material
        modifications should be made to the unaudited consolidated financial
        statements incorporated by reference in the Prospectus for them to be in
        conformity with generally accepted accounting principles or (2) the
        unaudited consolidated financial statements incorporated by reference in
        the Prospectus do not comply with the applicable accounting requirements
        of the Act or the Exchange Act as they apply to Form 10-Q and the
        Regulations or the Exchange Act Regulations; (B) at the date of the
        latest available interim balance sheet of the Company and at a
        subsequent specified date not more than five days prior to the date of
        such letter, there has been any change in the capital stock, or any
        increase in the long-term debt, or any decrease in net assets, in each
        case of the Company and as compared with amounts shown in the balance
        sheet as of the date of the latest financial statements incorporated by
        reference in the Prospectus, except in each case for changes, increases
        or decreases that the Registration Statement discloses have occurred or
        may occur, that were occasioned by the declaration of dividends or that
        are described in such letter identifying the same and specifying the
        amount thereof (in which case such letter shall be accompanied by an
        explanation of the Company as to the significance thereof unless such
        explanation is not deemed necessary by the Representatives); or (C) for
        the twelve months ended as of the date of the latest available unaudited
        financial statements, there were any decreases, as compared with the
        comparable period of the preceding year, in the Company's operating
        revenues, net income or earnings available for common stock, except in
        each case for decreases that the Registration Statement discloses have
        occurred or may occur, that were occasioned by the declaration of
        dividends or that are described in such letter identifying the same and
        specifying the amount thereof (in which case such letter shall be
        accompanied by an explanation of the Company as to the significance
        thereof unless such explanation is not deemed necessary by the
        Representatives); and

               (iv) they have performed certain other specified procedures with
        respect to certain amounts and percentages set forth in the Registration
        Statement or in the documents incorporated by reference in the
        Prospectus, as have been requested by the Representatives or counsel for
        the Underwriters and approved by the Company, and have found them to be
        in agreement with the records of the Company and the computations to be
        arithmetically correct.

          (e) At the Time of Delivery, Deloitte & Touche LLP shall have
     furnished to the Representatives a letter, dated the Time of Delivery, to
     the effect that the statements set forth in the letter furnished pursuant
     to Section 6(d) hereof are reaffirmed, except that the specified date
     referred to therein shall be a date not more than five days prior to the
     Time of Delivery.

          (f) At the Time of Delivery, the Representatives shall have received a
     certificate, dated the Time of Delivery and signed by an executive officer
     of the Company, to the effect that (i) the Company's representations and
     warranties set forth in Section 1 hereof are true and correct at and as of
     the Time of Delivery with the same effect as if made at and as of the Time
     of Delivery; provided, however, that (A) if any post-effective 

                                       12
<PAGE>
 
     amendment to the Registration Statement shall have been filed subsequent to
     the date hereof, the Registration Statement referred to in Section 1(b)
     hereof shall be deemed, for the purposes of such certificate, to include
     such amendment and (B) if the Completed Prospectus shall have been filed
     with the Commission pursuant to Rule 424(b) of the Regulations, the
     Prospectus referred to in Sections 1(c), (e), (f), (g) and (i) hereof shall
     be deemed, for the purposes of such certificate, to be the Completed
     Prospectus, (ii) the Company shall have performed all of its obligations
     hereunder to be performed at or prior to the Time of Delivery, (iii) if the
     Company shall have been required to file the Completed Prospectus with the
     Commission pursuant to Rule 424(b) of the Regulations, the Company shall
     have done so and (iv) the order or orders described in Section 6(b) hereof
     shall be in full force and effect.

          (g) All legal proceedings to be taken in connection with the issuance
     and sale of the Firm Shares shall be reasonably satisfactory in form and
     substance to counsel for the Underwriters.

          (h) Subsequent to the date of this Agreement, there shall not have
     occurred (i) any material change in or affecting the business, properties,
     financial condition or results of operations of the Company and its
     subsidiaries taken as a whole not contemplated by the Prospectus or any
     amendment or supplement thereto (including the documents incorporated by
     reference therein at the date thereof) that, in the opinion of the
     Representatives, would materially and adversely affect the market for the
     Firm Shares or (ii) any event or development relating to or involving the
     Company or any officer or director of the Company that, in the opinion of
     the Company and its counsel or the Representatives and counsel for the
     Underwriters, requires the making of any addition to or change in the
     Prospectus or any amendment or supplement thereto in order to state a
     material fact required by the Act to be stated therein or necessary in
     order to make the statements therein not misleading, if amending or
     supplementing the Prospectus to reflect such event or development would, in
     the opinion of the Representatives, adversely affect the market for the
     Firm Shares.

          (i) The Firm Shares shall have been listed (subject to official notice
     of issuance) on the NYSE.

          (j) The NASD shall have confirmed that it has not raised any objection
     with respect to the fairness or reasonableness of the underwriting terms
     and arrangements of the offering of the Securities.

     In case any of the conditions specified above in this Section 6 shall not
have been fulfilled at the Time of Delivery, this Agreement may be terminated by
the Representatives upon notice thereof to the Company at any time at or prior
to the Time of Delivery. Any such termination shall be without liability of any
party to any other party hereunder, except as otherwise provided in Section 5
hereof and provided that the provisions of Sections 1, 5, 9 and 14 hereof shall
survive such termination and remain in full force and effect.

                                       13
<PAGE>
 
     7.  Conditions to Obligations of the Underwriters to Purchase Option
         ----------------------------------------------------------------
Shares. The several obligations of the Underwriters to purchase and pay for any
- ------
Option Shares shall be subject to the accuracy of the representations and
warranties of the Company set forth in Section 1 hereof as of the date hereof,
to the accuracy of the statements of the officers of the Company made in any
certificate given pursuant to the provisions hereof, to the performance by the
Company of its obligations hereunder to be performed at or prior to the Option
Shares Time of Delivery with respect to such Option Shares, and to the following
additional conditions:

          (a) (i) No stop order suspending the effectiveness of the Registration
     Statement shall be in effect at such Option Shares Time of Delivery and no
     order of the Commission directed to the adequacy or accuracy of any
     document incorporated by reference in the Prospectus shall be in effect at
     such Option Shares Time of Delivery; no proceedings for any such purpose
     shall be pending before, or threatened by, the Commission on such date; if
     the Completed Prospectus, or any supplement thereto or to the Prospectus,
     is required to be filed with the Commission pursuant to Rule 424(b) of the
     Regulations, the Completed Prospectus, or any such supplement, shall have
     been filed in the manner and within the time period required by Rule 424(b)
     of the Regulations and the Company shall have provided evidence reasonably
     satisfactory to the Representatives thereof; and the Representatives shall
     have received a certificate dated such Option Shares Time of Delivery and
     signed by an executive officer of the Company to the effect that no such
     order is in effect and that no proceedings for any such purpose are pending
     before, or to the knowledge of the Company threatened by, the Commission;
     (ii) there shall not have been any change in the matters described in the
     letter furnished pursuant to Section 6(d) hereof the effect of which would,
     in the opinion of the Representatives, materially and adversely affect the
     market for such Option Shares; (iii) there shall not have been, since the
     respective dates as of which information is given in the Registration
     Statement and the Prospectus (or any amendment or supplement thereto),
     except as may otherwise be stated in the Registration Statement and the
     Prospectus (or any amendment or supplement thereto), any material adverse
     change in the condition, financial or otherwise, or in the earnings,
     business affairs or business prospects of the Company and its subsidiaries
     taken as a whole; and (iv) the Company and its subsidiaries shall not have
     any liabilities or obligations, direct or contingent (whether or not in the
     ordinary course of business), that are material to the Company and its
     subsidiaries taken as a whole, other than those reflected in the
     Registration Statement or the Prospectus (or any amendment or supplement
     thereto).

          (b) At such Option Shares Time of Delivery, there shall be in full
     force and effect an order or orders of the MPSC authorizing the issuance
     and sale of the Securities on the terms and conditions herein set forth,
     and containing no provision unacceptable to the Representatives by reason
     of the fact that it is materially adverse to the Company (it being
     understood that no order in effect on the date hereof contains any such
     unacceptable provision).

          (c) At such Option Shares Time of Delivery, the Representatives shall
     have received from Gerald T. McNeive, Jr., Esq., Senior Vice President--
     Finance and General Counsel of the Company, and Winthrop, Stimson, Putnam &
     Roberts, counsel for the 

                                       14
<PAGE>
 
     Underwriters, opinions, dated such Option Shares Time of Delivery, with
     respect to such Option Shares in substantially the form and substance
     prescribed in Exhibits A and B, respectively, hereto.

          (d) At such Option Shares Time of Delivery, Deloitte & Touche LLP
     shall have furnished to the Representatives a letter, dated such Option
     Shares Time of Delivery, to the effect that the statements set forth in the
     letter furnished pursuant to Section 6(d) hereof are reaffirmed, except
     that the specified date referred to therein shall be a date not more than
     five days prior to such Option Shares Time of Delivery.

          (e) At such Option Shares Time of Delivery, the Representatives shall
     have received a certificate, dated such Option Shares Time of Delivery and
     signed by an executive officer of the Company, to the effect that (i) the
     Company's representations and warranties set forth in Section 1 hereof are
     true and correct at and as of such Option Shares Time of Delivery with the
     same effect as if made at and as of such Option Shares Time of Delivery;
     provided, however, that (A) if any post-effective amendment to the
     Registration Statement shall have been filed subsequent to the date hereof,
     the Registration Statement referred to in Section 1(b) hereof shall be
     deemed, for the purposes of such certificate, to include such amendment and
     (B) if the Completed Prospectus shall have been filed with the Commission
     pursuant to Rule 424(b) of the Regulations, the Prospectus referred to in
     Sections 1(c), (e), (f), (g) and (i) hereof shall be deemed, for the
     purposes of such certificate, to be the Completed Prospectus, (ii) the
     Company shall have performed all of its obligations hereunder to be
     performed at or prior to such Option Shares Time of Delivery, (iii) if the
     Company shall have been required to file the Completed Prospectus with the
     Commission pursuant to Rule 424(b) of the Regulations, the Company shall
     have done so and (iv) the order or orders described in Section 7(b) hereof
     shall be in full force and effect.

          (f) All legal proceedings to be taken in connection with the issuance
     and sale of the Securities shall be reasonably satisfactory in form and
     substance to counsel for the Underwriters.

          (g) Subsequent to the date of this Agreement, there shall not have
     occurred (i) any material adverse change in the condition, financial or
     otherwise, or in the earnings, business affairs or business prospects of
     the Company and its subsidiaries taken as a whole not contemplated by the
     Prospectus or any amendment or supplement thereto (including the documents
     incorporated therein by reference at the date thereof) that, in the opinion
     of the Representatives, would materially, adversely affect the market for
     the Securities or (ii) any event or development relating to or involving
     the Company or any officer or director of the Company that, in the opinion
     of the Company and its counsel or the Representatives and counsel for the
     Underwriters, requires the making of any addition to or change in the
     Prospectus or any amendment or supplement thereto in order to state a
     material fact required by the Act to be stated therein or necessary in
     order to make the statements therein not misleading, if amending or
     supplementing the Prospectus to reflect such event or development would, in
     the opinion of the Representatives, adversely affect the market for the
     Securities.

                                       15
<PAGE>
 
          (h) Such Option Shares shall have been listed (subject to official
     notice of issuance) on the NYSE.

     In case any of the conditions specified above in this Section 7 shall not
have been fulfilled at such Option Shares Time of Delivery, this Agreement may
be terminated by the Representatives upon notice thereof to the Company at any
time at or prior to such Option Shares Time of Delivery. Any such termination
shall be without liability of any party to any other party hereunder, except as
otherwise provided in Section 5 hereof and provided that the provisions of
Sections 1, 5, 9 and 14 hereof shall survive such termination and remain in full
force and effect.

     8.  Conditions of Company's Obligation. The obligation of the Company to
         ---------------------------------- 
deliver the Firm Shares at the Time of Delivery and any Option Shares at the
Option Shares Time of Delivery with respect to such Option Shares shall be
subject to the following conditions:

          (a) No stop order suspending the effectiveness of the Registration
     Statement shall be in effect at the Time of Delivery or such Option Shares
     Time of Delivery, as the case may be, and no order of the Commission
     directed to the adequacy or accuracy of any document incorporated by
     reference in the Prospectus shall be in effect at such date; and no
     proceedings for any such purpose shall be pending before, or threatened by,
     the Commission at the Time of Delivery or such Option Shares Time of
     Delivery, as the case may be.

          (b) At the Time of Delivery or such Option Shares Time of Delivery, as
     the case may be, there shall be in full force and effect an order or orders
     of the MPSC authorizing the issuance and sale of the Securities on the
     terms and conditions herein set forth, and containing no provisions
     unacceptable to the Company by reason of the fact that it is materially
     adverse to the Company (it being understood that no order in effect on the
     date hereof contains any such unacceptable provision).

     In case any of the conditions specified above in this Section 8 shall not
have been fulfilled at the Time of Delivery or such Option Shares Time of
Delivery, as the case may be, this Agreement may be terminated by the Company,
upon notice thereof to the Representatives. Any such termination shall be
without liability of any party to any other party hereunder, except as otherwise
provided in Section 5 hereof and provided that the provisions of Sections 1, 5,
9 and 14 hereof shall survive such termination and remain in full force and
effect.

     9.  Indemnification; Contribution. (a) The Company agrees to indemnify and
         ----------------------------- 
hold harmless each of the Underwriters and each person, if any, who controls any
of the Underwriters within the meaning of Section 15 of the Act or Section 20 of
the Exchange Act against (i) any and all losses, claims, damages, liabilities
and expenses whatsoever, as incurred, arising out of any untrue statement or
alleged untrue statement of a material fact contained in the Registration
Statement (or any amendment thereto), including any information deemed to be a
part thereof pursuant to Rule 430A(b) of the Regulations, or the omission or
alleged omission therefrom of a material fact required to be stated therein or
necessary to make the statements therein not misleading or arising out of any
untrue statement or alleged untrue statement of a material fact contained in any
preliminary prospectus relating to the Securities or the Prospectus (or any

                                       16
<PAGE>
 
amendment or supplement thereto) or the omission or alleged omission therefrom
of a material fact required to be stated therein or necessary to make the
statements therein, in the light of the circumstances under which they were
made, not misleading; (ii) any and all losses, claims, damages, liabilities and
expenses whatsoever, as incurred, to the extent of the aggregate amount paid in
settlement of any litigation, or any investigation or proceeding by any
governmental agency or body, commenced or threatened, or of any claim whatsoever
based upon any such untrue statement or omission, or any such alleged untrue
statement or omission, provided that (subject to the last sentence of Section
9(c) hereof) any such settlement is effected with the written consent of the
Company; and (iii) any and all expense whatsoever, as incurred (including,
subject to Section 9(c) hereof, the fees and disbursements of counsel chosen by
the Representatives), reasonably incurred in investigating, preparing or
defending against any litigation, or any investigation or proceeding by any
governmental agency or body, commenced or threatened, or any claim whatsoever
based upon any untrue statement or omission, or any such alleged untrue
statement or omission, to the extent that any such expense is not paid under
clause (i) or (ii) above; provided, however, that the indemnity agreement
contained in this Section 9(a) shall not (A) apply to any such losses, claims,
damages, liabilities or expenses to the extent arising out of any such untrue
statement or alleged untrue statement, or any such omission or alleged omission,
made in reliance upon and in conformity with information furnished in writing to
the Company, through the Representatives by any Underwriter, expressly for use
in the Registration Statement (or any amendment thereto) or any preliminary
prospectus relating to the Securities or the Prospectus (or any amendment or
supplement thereto) or (B) inure to the benefit of any Underwriter or any person
who controls such Underwriter within the meaning of Section 15 of the Act on
account of any such losses, claims, damages, liabilities or expenses arising
from the sale of any of the Securities to any person if any amendment or
supplement to the Prospectus (excluding any document incorporated or deemed to
be incorporated by reference therein), furnished to the Representatives by the
Company prior to the sending or giving of written confirmation of such sale to
such person, was not sent or given by or on behalf of such Underwriter to such
person with or prior to such written confirmation and any such untrue statement
or alleged untrue statement, or any such omission or alleged omission, was
corrected in such Prospectus.

     (b) Each of the Underwriters, severally, agrees to indemnify and hold
harmless the Company, its directors, each of its officers who shall have signed
the Registration Statement and each person, if any, who controls the Company
within the meaning of Section 15 of the Act or Section 20 of the Exchange Act
against any and all losses, claims, damages, liabilities and expenses described
in Section 9(a) hereof, as incurred, but only with respect to the untrue
statements or omissions, or alleged untrue statements or omissions, made in the
Registration Statement (or any amendment thereto) or any preliminary prospectus
relating to the Securities or the Prospectus (or any amendment or supplement
thereto) in reliance upon and in conformity with information furnished in
writing to the Company, through the Representatives by such Underwriter,
expressly for use in connection with the Registration Statement (or any
amendment thereto) or any preliminary prospectus relating to the Securities or
the Prospectus (or any amendment or supplement thereto).

     (c) Each indemnified party shall give notice as promptly as reasonably
practicable to each indemnifying party of any action commenced against it in
respect of which indemnity may 

                                       17
<PAGE>
 
be sought hereunder, but failure to so notify an indemnifying party shall not
relieve such indemnifying party from any liability on account of this indemnity
agreement except to the extent that such indemnifying party has been prejudiced
in any material respect by such failure or from any liability that such
indemnifying party may have to such indemnified party otherwise than on account
of this indemnity agreement. In the case of parties indemnified pursuant to
Section 9(a) hereof, counsel to the indemnified parties shall be selected by the
Representatives and, in the case of parties indemnified pursuant to Section 9(b)
hereof, counsel to the indemnified parties shall be selected by the Company. An
indemnifying party shall be entitled to participate at its own expense in the
defense of any such action; provided, however, that counsel to the indemnifying
party shall not (except with the consent of the indemnified party) also be
counsel to the indemnified party. In no event shall the indemnifying parties be
liable for fees and expenses of more than one counsel (in addition to local
counsel) separate from their own counsel for all indemnified parties in
connection with any one action or separate but similar or related actions in the
same jurisdiction arising out of the same general allegations or circumstances.
No indemnifying party shall, without the prior written consent of the
indemnified parties, settle or compromise or consent to the entry of any
judgment with respect to any litigation, or any investigation or proceeding by
any governmental agency or body, commenced or threatened, or any claim
whatsoever in respect of which indemnification or contribution could be sought
under this Section 9 (whether or not the indemnified parties are actual or
potential parties thereto), unless such settlement, compromise or consent (i)
includes an unconditional release of each indemnified party from all liability
arising out of such litigation, investigation, proceeding or claim and (ii) does
not include a statement as to or an admission of fault, culpability or a failure
to act by or on behalf of any indemnified party. If at any time an indemnified
party shall have requested an indemnifying party to reimburse the indemnified
party for fees and expenses of counsel, such indemnifying party agrees that it
shall be liable for any settlement of the nature contemplated by Section
9(a)(ii) hereof effected without its written consent if (A) such settlement is
entered into more than 45 days after receipt by such indemnifying party of the
aforesaid request, (B) such indemnifying party shall have received notice of the
terms of such settlement at least 30 days prior to such settlement being entered
into and (C) such indemnifying party shall not have reimbursed such indemnified
party in accordance with such request prior to the date of such settlement.

     (d) If the indemnification provided for in Section 9(a) or (b) hereof is
for any reason unavailable to or insufficient to hold harmless an indemnified
party in respect of any losses, claims, damages, liabilities or expenses
referred to therein, then each indemnifying party shall contribute to the
aggregate amount of such losses, claims, damages, liabilities and expenses
incurred by such indemnified party, as incurred, (i) in such proportion as is
appropriate to reflect the relative benefits received by the Company on the one
hand and the Underwriters on the other hand from the offering of the Securities
pursuant to this Agreement or (ii) if the allocation provided by clause (i) is
not permitted by applicable law, or if such indemnified party failed to give the
notice required under Section 9(c) hereof and such indemnifying party was
prejudiced in a material respect by such failure, in such proportion as is
appropriate to reflect not only the relative benefits referred to in clause (i)
above but also the relative fault of the Company on the one hand and the
Underwriters on the other hand in connection with the statements or omissions
that resulted in such losses, claims, damages, liabilities or expenses, as well
as any other relevant equitable considerations. The relative benefits received
by the Company on the one hand and the 

                                       18
<PAGE>
 
Underwriters on the other hand in connection with the offering of the Securities
pursuant to this Agreement shall be deemed to be in the same respective
proportions as the total net proceeds from the offering of the Securities
pursuant to this Agreement (before deducting expenses) received by the Company
and the total underwriting discount received by the Underwriters, in each case
as set forth on the cover of the Prospectus bear to the aggregate initial public
offering price of the Securities as set forth on such cover. The relative fault
of the Company on the one hand and the Underwriters on the other hand shall be
determined by reference to, among other things, whether any such untrue or
alleged untrue statement of a material fact or omission or alleged omission to
state a material fact relates to information supplied by the Company or by the
Underwriters and the parties' relative intent, knowledge, access to information
and opportunity to correct or prevent such statement or omission.

     The Company and the Underwriters agree that it would not be just and
equitable if contribution pursuant to this Section 9(d) were determined by pro
rata allocation (even if the Underwriters were treated as one entity for such
purpose) or by any other method of allocation that does not take account of the
equitable considerations referred to above in this Section 9(d). The aggregate
amount of losses, claims, damages, liabilities and expenses incurred by an
indemnified party and referred to above in this Section 9(d) shall be deemed to
include any legal or other expenses reasonably incurred by such indemnified
party in investigating, preparing or defending against any litigation, or any
investigation or proceeding by any governmental agency or body, commenced or
threatened, or any claim whatsoever based upon any such untrue or alleged untrue
statement or omission or alleged omission.

     Notwithstanding the provisions of this Section 9(d), no Underwriter shall
be required to contribute any amount in excess of the amount by which the total
price at which the Securities underwritten by it and distributed to the public
were offered to the public exceeds the amount of any damages that such
Underwriter has otherwise been required to pay by reason of any such untrue or
alleged untrue statement or omission or alleged omission. No person guilty of
fraudulent misrepresentation (within the meaning of Section 11(f) of the Act)
shall be entitled to contribution from any person who was not guilty of such
fraudulent misrepresentation. For purposes of this Section 9(d), each person, if
any, who controls an Underwriter within the meaning of Section 15 of the Act or
Section 20 of the Exchange Act shall have the same rights to contribution as
such Underwriter, and each director of the Company, each officer of the Company
who shall have signed the Registration Statement and each person, if any, who
controls the Company within the meaning of Section 15 of the Act or Section 20
of the Exchange Act shall have the same rights to contribution as the Company.
The Underwriters' respective obligations to contribute pursuant to this Section
9(d) are several in proportion to the number of Firm Shares set forth opposite
their respective names in Schedule I hereto and not joint.

     10.  Termination. (a) The Representatives may terminate this Agreement at
any time at or prior to the Time of Delivery, or rescind the exercise of the
Option by the Underwriters at any time prior to an Option Shares Time of
Delivery, by notice to the Company, if prior to the Time of Delivery or such
Option Shares Time of Delivery, as the case may be, (i) there has been, since
the date of this Agreement or since the respective dates as of which information
is given in the Prospectus, any material adverse change in the business or the
condition, financial or otherwise, or in the earnings, business affairs or
business prospects of the Company and its subsidiaries

                                       19
<PAGE>
 
taken as a whole, whether or not arising in the ordinary course of business, or
(ii) there has occurred any material adverse change in the financial markets in
the United States or any outbreak of hostilities or escalation of any existing
hostilities or calamity or crisis or any change or development involving a
prospective change in national or international political, financial or economic
conditions, in each case the effect of which is such as to make it, in the
judgment of the Representatives, impracticable to market the Securities or to
enforce contracts for the sale of the Securities, or (iii) trading in the Common
Stock has been suspended or materially limited by the Commission or the NYSE, or
trading generally on the NYSE or the American Stock Exchange or in the Nasdaq
National Market has been suspended or materially limited, or minimum or maximum
prices for trading have been fixed, or maximum ranges for prices have been
required, by the NYSE, the American Stock Exchange or the Nasdaq National Market
System or by order of the Commission, the NASD or any other governmental
authority, or (iv) a banking moratorium has been declared by either Federal, New
York or Missouri authorities.

     (b) Notwithstanding any termination of this Agreement pursuant to this
Section 10, such termination will be without liability of any party to any other
party hereunder, except as otherwise provided in Section 5 hereof and provided
that the provisions of Sections 1, 5, 9 and 14 hereof shall survive such
termination and remain in full force and effect.

     11.  Notices. All statements, requests, notices and agreements hereunder
          ------- 
shall be in writing or by telephone if confirmed in writing within 24 hours and,
if to the Underwriters, shall be sufficient in all respects if delivered or sent
by registered mail to the Representatives at the address given on the last page
hereof; and, if to the Company, shall be sufficient in all respects if delivered
or sent by registered mail to the Company, c/o Office of the General Counsel,
Laclede Gas Company, 720 Olive Street, St. Louis, Missouri 63101; provided,
however, that any notice to any of the Underwriters pursuant to Section 9(c)
hereof shall be delivered or sent by registered mail to such party at its
principal executive offices.

     12.  Information for Use in Prospectuses. The information with respect to
          ----------------------------------- 
the price to the public of the Securities to be set forth on, and the
information to be set forth in the last paragraph of, the cover page of, and the
information to be set forth in the second paragraph under the table under
"Underwriting" in, the Prospectus shall be deemed to have been furnished in
writing to the Company through the Representatives by or on behalf of the
Underwriters specifically for use therein.

     13.  Representations and Warranties of Representatives. Each of the 
          ------------------------------------------------- 
Representatives represents and warrants to the Company that it has full power
and authority (a) to enter into this Agreement on behalf of each of the
Underwriters listed in Schedule I hereto and (b) to act on behalf of each of the
Underwriters with respect to the performance of this Agreement. In all dealings
hereunder, the Company shall be entitled to act and rely upon any statement,
request, notice or agreement on behalf of all of the Underwriters made or given
either by the Representatives jointly or by either of the Representatives
individually.

     14.  Miscellaneous. (a) This Agreement shall be binding upon the 
          ------------- 
Underwriters and the Company and shall inure solely to the benefit of the
Underwriters, the Company and, to the extent provided in Section 9 hereof, the
directors and officers of the Company and each

                                       20
<PAGE>
 
person who controls the Company or any of the Underwriters, and in each case
their respective heirs, executors, administrators, successors and assigns, and
no other person shall acquire or have any right under or by virtue of this
Agreement. No purchaser of any of the Securities from any of the Underwriters
shall be deemed a successor or assign by reason merely of such purchase.

     (b) This Agreement shall be construed in accordance with the laws of the
State of New York applicable to contracts made and to be performed in the State
of New York.

     (c) This Agreement may be executed by any one or more of the parties hereto
in any number of counterparts, each of which shall be deemed to be an original,
but all such counterparts shall together constitute one and the same instrument.

     (d) All representations, warranties and agreements contained in this
Agreement, or in certificates of officers of the Company or any of its
subsidiaries submitted pursuant hereto, shall remain operative and in full force
and effect, regardless of any investigation made by or on behalf of any
Underwriter or controlling person, or by or on behalf of the Company, and shall
survive delivery of the Securities to the Underwriters.

                                       21
<PAGE>
 
     If the foregoing is in accordance with your understanding of our agreement,
please sign and return to us the counterparts hereof enclosed, and upon the
acceptance hereof by you, this letter and such acceptance hereof shall
constitute a binding agreement between the several Underwriters and the Company.

                              Very truly yours,

                              LACLEDE GAS COMPANY

                              By:
                                 -----------------------------
                                 Name:
                                 Title:

Accepted at New York, New York
as of the date first above written:

MERRILL LYNCH & CO.
Merrill Lynch, Pierce, Fenner & Smith
        Incorporated
A.G. EDWARDS & SONS, INC.

For themselves and as Representatives of
the other Underwriters named in Schedule I
to this Underwriting Agreement.

By:  Merrill Lynch, Pierce, Fenner & Smith
          Incorporated

By
  -------------------------------------
          Authorized Signatory

Address:  Merrill Lynch & Co.
          World Financial Center
          North Tower
          New York, New York 10281

                                       22
<PAGE>
 
                                   SCHEDULE I

                                                        Number of Shares
Underwriters                                             to be Purchased
- ------------                                           -------------------
 
Merrill Lynch, Pierce, Fenner & Smith
            Incorporated
A.G. Edwards & Sons, Inc.
 
 
 
 
 
 
 
 
 
         Total                                                 1,100,000
                                                              ==========

                                       23
<PAGE>
 
                                                                       Exhibit A
                                                                       ---------

                   [Opinion of Gerald T. McNeive, Jr., Esq.]

                          [Letterhead of the Company]


                                 May [__], 1999

MERRILL LYNCH & CO.
Merrill Lynch, Pierce, Fenner & Smith
               Incorporated
A.G. EDWARDS & SONS, INC.

As Representatives of the several
 Underwriters named in Schedule I
 to the Underwriting Agreement referred
 to below (the "Underwriters")

c/o  Merrill Lynch & Co.
     World Financial Center
     North Tower
     New York, New York 10281

Ladies and Gentlemen:

     I am Senior Vice President--Finance and General Counsel of Laclede Gas
Company (the "Company") and have acted in that capacity in connection with the
issuance and sale by the Company pursuant to the Underwriting Agreement dated
May [__], 1999 between the Company and you, as Representatives of the
Underwriters (the "Underwriting Agreement"), of [_____] shares of the Company's
Common Stock, par value $1 per share (the "Shares"). The terms "Registration
Statement" and "Prospectus" as used herein have the same meanings as when used
in the Underwriting Agreement.

     I am familiar with the Articles of Incorporation, as amended, and the By-
Laws, as currently in effect, of the Company (the "Articles" and the "By-Laws,"
respectively) and the records of various corporate and other proceedings,
including the actions taken by the 

<PAGE>
 
Company's Board of Directors relating to the authorization, issuance and sale of
the Shares. I have participated in the preparation of or reviewed (a) the
Underwriting Agreement; (b) the Registration Statement and the Prospectus; and
(c) the proceedings before the State of Missouri Public Service Commission (the
"MPSC") for authority to issue and sell the Shares and the order effective 
January 22, 1999 and the supplemental order effective February 9, 1999 for
authority to issue and sell the Shares entered by the MPSC in respect thereto
(such orders, the "MPSC Orders").

     I have examined the Annual Report on Form 10-K of the Company for the
fiscal year ended September 30, 1998, the Quarterly Reports on Form 10-Q of the
Company for the quarterly periods ended December 31, 1998 and March 31, 1999,
the Current Report on Form 8-K of the Company, dated January 28, 1999 and the
Form 8-A Registration Statement of the Company dated April 3, 1996 (the
"Exchange Act Documents"), each as filed with the Securities and Exchange
Commission (the "Commission") under the Securities Exchange Act of 1934, as
amended (the "Exchange Act"), and incorporated by reference in the Prospectus.

     I have been advised by the Staff of the Commission of the issuance of an
order from the Commission to the Company as to the effectiveness of the
Registration Statement under the Securities Act of 1933, as amended (the
"Securities Act"). I have also examined such documents and satisfied myself as
to such other matters as I have deemed necessary to render this opinion. In the
course of such examination, I have assumed the genuineness of all signatures,
the legal capacity of natural persons, the authenticity of all documents
submitted to me as originals, the conformity to original documents of all
documents submitted to me as certified or photostatic copies and the
authenticity of the originals of such latter documents. I have also relied upon
information submitted to me by certain officers of the Company with respect to
the existence or non-existence of certain facts that form the basis for the
opinions set forth herein. Although I have not conducted any independent
investigations of the accuracy of various of the matters covered by such
information supplied by officers of the Company, I have no reason to believe
that any of the matters covered thereby are inaccurate. I have also relied on
certain documents, instruments and certificates of public officials. I have not
examined the certificates for the Shares, except a specimen thereof, and have
relied upon a certificate of the transfer agent and registrar for the Shares as
to the issuance, registration and countersignature thereof. With respect to the
matters relating to the outstanding shares of capital stock of the Company
(other than the Shares) expressed in paragraph 3. below, I have relied upon the
opinion of Thompson Mitchell Douglas & Neill, dated July 8, 1960, as to such
counsel's opinion with respect to the due and valid authorization and issuance
of, and the fully paid and non-assessable nature of, any such shares that were
issued on or prior to the date of such opinion. Upon the basis of my familiarity
with the foregoing and with the Company's properties and affairs generally, and
as limited by the qualifications and limitations stated herein, I am of the
opinion that:

          1.  Each of the Company, Laclede Pipeline Company, Laclede Investment
     Corporation and Laclede Energy Resources, Inc. is a corporation duly
     organized and validly existing in good standing under the laws of the State
     of Missouri.

          2.  The Company is a public utility corporation, is duly authorized by
     the Articles to conduct the utility business that it is described in the
     Prospectus as conducting, and, by virtue of its possession of valid and
     subsisting licenses, franchises 

                                      A-2

<PAGE>
 
     and permits, and its compliance with the laws of the State of Missouri, is
     duly authorized to conduct such business in that State. In this regard, it
     should be noted that the Company will seek to renew its franchise in
     Florissant, Missouri, which franchise expired in 1992; and that since that
     time the Company has continued to provide service in that community without
     a formal franchise.

          3.  All of the outstanding shares of capital stock of the Company
     (other than the Shares) have been duly and validly authorized and issued
     and are fully paid and non-assessable.

          4.  The Shares have been duly and validly authorized and, when the
     Shares shall have been delivered against payment therefor as provided in
     the Underwriting Agreement, they will have been duly and validly issued and
     will be fully paid and non-assessable and entitled to the rights set forth
     in the Articles and the Rights Agreement dated as of April 3, 1996 between
     the Company and UMB Bank, National Association (formerly Boatmen's
     Trust Company), as rights agent thereunder; and, other than as
     set forth in the Prospectus, there are no preemptive rights or other rights
     to subscribe for or to purchase, or any restriction upon the voting or
     transfer of, the Shares pursuant to the Articles or the By-Laws, or other
     agreement or instrument known to me to which the Company is a party or by
     which it is bound or to which any of the property of the Company is
     subject.

          5.  The statements made in the Prospectus under the caption
     "Description of Common Stock," insofar as they purport to constitute
     summaries of the terms of documents referred to therein, constitute
     accurate summaries of the terms of such documents in all material respects.

          6.  The Shares have been listed (subject to official notice of
     issuance) on the New York Stock Exchange.

          7.  The Underwriting Agreement has been duly authorized, executed and
     delivered by the Company.

          8.  The Registration Statement has become and is effective under the
     Securities Act; and, to the best of my knowledge, no proceedings for a stop
     order with respect thereto are pending or threatened under Section 8(d) of
     the Securities Act.

          9.  The MPSC has issued the MPSC Orders authorizing the issuance and
     sale by the Company of the Shares; the issuance and sale of the Shares in
     accordance with the Underwriting Agreement are in conformity with the terms
     of the MPSC Orders; and no further approval, authorization, consent or
     other order of any public board or body (other than in connection or in
     compliance with the provisions of the securities or blue sky laws of any
     jurisdiction) is legally required for the issuance and sale of the Shares
     on the terms and conditions set forth in the Underwriting Agreement.

          10.  There are no legal, governmental or administrative proceedings
     pending to which the Company is a party or of which any property of the
     Company is the subject, 


                                      A-3

<PAGE>
 
     other than as set forth in the Prospectus and other than proceedings
     incident to the kind of business conducted by the Company, the outcome of
     which, singly or in the aggregate, might reasonably be expected to have a
     materially adverse effect on the financial position, stockholders' equity
     or results of operations of the Company; and, to the best of my knowledge,
     no such proceedings are threatened or contemplated by governmental
     authorities or threatened by others.

          11.  The consummation of the transactions contemplated in the
     Underwriting Agreement and the fulfillment of the terms thereof will not
     result in a breach of any of the terms or provisions of, or constitute a
     default under, (i) any indenture, mortgage, deed of trust or other material
     agreement or instrument known to me to which the Company is a party or by
     which it is bound or to which any of the property of the Company is
     subject, (ii) the Articles or the Bylaws or (iii) any order, rule or
     regulation of any court or other governmental body having jurisdiction over
     the Company or any of its property, or any statute, in each case of the
     United States of America or the State of Missouri, or, to the best of my
     knowledge, any order, rule or regulation of any other court or other
     governmental body having jurisdiction over the Company or any of its
     property or any other statute.

     I have not independently verified the accuracy, completeness or fairness of
the statements made or included in the Registration Statement, the Prospectus or
the Exchange Act Documents and take no responsibility therefor, except insofar
as such statements relate to me and as and to the extent expressly set forth
herein. In the course of the preparation of the Registration Statement and the
Prospectus, I and other members of the Company's legal department (the "Legal
Department") have participated in conferences with certain of the Company's
officers and employees, with representatives of Deloitte & Touche LLP, the
independent accountants for the Company, with your representatives and with
counsel for the Underwriters. Based on my examination of the Registration
Statement and the Prospectus, and the investigations made in connection with the
preparation of the Registration Statement and the Prospectus and the Legal
Department's participation in the conferences referred to above, (i) I am of the
opinion that the Registration Statement, as of the date it was declared
effective by the Commission, and the Prospectus, as of the date it was filed
with the Commission pursuant to Rule 424(b) under the Securities Act, complied
as to form in all material respects with the requirements of the Securities Act
and the applicable rules and regulations of the Commission thereunder and that
the Exchange Act Documents complied as to form when filed in all material
respects with the requirements of the Exchange Act and the applicable rules and
regulations of the Commission thereunder, except that in each case I express no
opinion with respect to the financial statements or schedules or other financial
or statistical data contained or incorporated by reference in the Registration
Statement, the Prospectus or the Exchange Act Documents, and (ii) I have no
reason to believe that the Registration Statement, as of the date it was
declared effective by the Commission, contained an untrue statement of a
material fact or omitted to state a material fact required to be stated therein
or necessary in order to make the statements therein not misleading or that the
Prospectus, as of the date hereof, includes any untrue statement of a material
fact or omits to state a material fact necessary in order to make the statements
made therein, in the light of the circumstances under which they were made, not
misleading, except that in each case I express no opinion or belief with respect
to the financial statements or schedules or other 

                                      A-4

<PAGE>
 
financial or statistical data contained or incorporated by reference in the
Registration Statement, the Prospectus or the Exchange Act Documents.

     In passing upon the form of the Registration Statement, the form of the
Prospectus and the forms of the Exchange Act Documents, I necessarily assume the
correctness and completeness of the statements made by the Company and
information included therein and take no responsibility therefor, except insofar
as such statements relate to me and as set forth in paragraph 5. above.

     I have examined the portions of the information contained in the
Registration Statement that are stated therein to have been made on my authority
and, upon my review thereof, I believe such information to be correct.

     I am a member of the Bar of the State of Missouri and, except with respect
to the matters expressed in paragraphs 2., 9., 10. and 11. above, I do not
express any opinion herein as to any matters governed by any laws other than the
laws of the State of Missouri and the Federal laws of the United States of
America.

     I am also delivering this opinion to Winthrop, Stimson, Putnam & Roberts,
who is entitled to rely upon this opinion to the same extent as if such opinion
were addressed to such firm. This opinion is rendered to you and Winthrop,
Stimson, Putnam & Roberts in connection with the above-described transaction.
This opinion may not be relied upon by you or Winthrop, Stimson, Putnam &
Roberts for any other purpose, or relied upon by or furnished to any other
person, firm or corporation (other than the Underwriters), without my prior
written consent.

     This opinion speaks only as of its date. I have no obligation to advise the
Underwriters or you, as their Representatives, of changes in law or fact that
occur after the date of this opinion, even where such change may affect the
legal analysis, a legal conclusion or an informational confirmation in this
opinion.

                         Very truly yours,


                                      A-5

<PAGE>
 
                                                                       Exhibit B
                                                                       ---------

              [Letterhead of Winthrop, Stimson, Putnam & Roberts]

                                 May [__], 1999

MERRILL LYNCH & CO.
Merrill Lynch Pierce, Fenner & Smith
              Incorporated
A.G. EDWARDS & SONS, INC.

As Representatives of the several
 Underwriters named in Schedule I
 to the Underwriting Agreement
 referred to below (the "Underwriters")

c/o  Merrill Lynch & Co.
     World Financial Center
     North Tower
     New York, New York 10281

Ladies and Gentlemen:

     We have acted as your counsel in connection with the issuance and sale by
Laclede Gas Company (the "Company") of [_____] shares of the Company's Common
Stock, par value $1 per share (the "Shares"), pursuant to the Underwriting
Agreement dated May [__], 1999 between the Company and you, as Representatives
of the Underwriters (the "Underwriting Agreement"). The terms "Registration
Statement" and "Prospectus" as used herein have the same meanings as when used
in the Underwriting Agreement.

     We have reviewed the Registration Statement and the Prospectus, which
pursuant to Form S-3 under the Securities Act of 1933, as amended (the
"Securities Act"), incorporates by reference the Annual Report on Form 10-K of
the Company for the fiscal year ended September 30, 1998, the Quarterly Reports
on Form 10-Q of the Company for the quarterly 

<PAGE>
 
periods ended December 31, 1998 and March 31, 1999, the Current Report on Form 
8-K of the Company dated January 28, 1999 and the Form 8-A Registration
Statement of the Company dated April 3, 1996 (the "Exchange Act Documents"),
each as filed with the Securities and Exchange Commission (the "Commission")
under the Securities Exchange Act of 1934, as amended (the "Exchange Act"). In
addition, we have reviewed, and have relied as to matters of fact upon, the
documents delivered to you at the closing (except the certificates for the
Shares, of which we have reviewed a specimen, and have relied upon a certificate
of the transfer agent and registrar for the Shares as to the issuance,
registration and countersignature thereof) and upon originals or copies,
certified or otherwise identified to our satisfaction, of such corporate
records, agreements, documents and other instruments and such certificates or
comparable documents of public officials and of officers and representatives of
the Company, and have made such other and further investigations, as we have
deemed relevant and necessary as a basis for the opinions hereinafter set forth.
In such review, we have assumed the genuineness of all signatures, the legal
capacity of natural persons, the authenticity of all documents submitted to us
as originals, the conformity to original documents of all documents submitted to
us as certified or photostatic copies and the authenticity of the originals of
such latter documents.

     We are members of the Bar of the State of New York and we do not express
any opinion herein as to any matters governed by any laws other than the laws of
the State of New York, the Federal laws of the United States of America and, to
the extent set forth herein, the laws of the State of Missouri. With respect to
legal matters governed by the laws of the State of Missouri, we understand that
you are relying upon the opinion of Gerald T. McNeive, Jr., Esq., Senior Vice
President--Finance and General Counsel of the Company, of even date, addressed
to you. We believe that such opinion is satisfactory in form and that you are
justified in relying thereon and we, on our part, have relied solely on said
opinion as to such matters. We do not pass upon legal matters regarding the
incorporation of the Company or its qualification to do business in any
jurisdiction, as to which we understand you are relying upon the aforesaid
opinion of Mr. McNeive.

          Based upon the foregoing and subject to the qualifications and
limitations stated herein, we hereby advise you that in our opinion:

          1.  The Shares have been duly authorized by the Company and, upon
     payment and delivery in accordance with the Underwriting Agreement, will be
     validly issued, fully paid and nonassessable.

          2.  The statements made in the Prospectus under the caption
     "Description of Common Stock," insofar as they purport to constitute
     summaries of the terms of documents referred to therein, constitute
     accurate summaries of the terms of such documents in all material respects.

          3.  The Underwriting Agreement has been duly authorized, executed and
     delivered by the Company.

                                      B-2

<PAGE>
 
          4.  The Registration Statement has become and is effective under the
     Securities Act; and, to the best of our knowledge, no proceedings for a
     stop order with respect thereto are pending or threatened under Section
     8(d) of the Securities Act.

          5.  No approval, authorization, consent or other order of any
     governmental agency or body of the United States of America or the State of
     New York is legally required for the issuance and sale by the Company of
     the Shares on the terms and conditions set forth in the Underwriting
     Agreement (other than the order of the Commission declaring the
     Registration Statement effective and except that we express no opinion as
     to any such approval, authorization, consent or other order as may be
     required under the provisions of the securities or blue sky laws of the
     State of New York in connection with the purchase and distribution of the
     Shares by the Underwriters).

     We have not independently verified the accuracy, completeness or fairness
of the statements made or included in the Registration Statement, the Prospectus
or the Exchange Act Documents and take no responsibility therefor, except
insofar as such statements relate to us and to the extent expressly set forth
herein. In the course of the preparation by the Company of the Registration
Statement and the Prospectus (excluding the Exchange Act Documents), we
participated in conferences with certain of its officers and employees, with
counsel for the Company, with representatives of Deloitte & Touche LLP, the
independent accountants who examined certain of the Exchange Act Documents, and
with your representatives. We did not prepare the Exchange Act Documents. Based
on our examination of the Registration Statement, the Prospectus and the
Exchange Act Documents, our investigations made in connection with the
preparation of the Registration Statement and the Prospectus (excluding the
Exchange Act Documents) and our participation in the conferences referred to
above, (i) we are of the opinion that the Registration Statement, as of the date
it was declared effective by the Commission, and the Prospectus, as of the date
it was filed with the Commission pursuant to Rule 424(b) under the Securities
Act, complied as to form in all material respects with the requirements of the
Securities Act and the applicable rules and regulations of the Commission
thereunder, except that in each case we express no opinion with respect to the
financial statements or schedules or other financial or statistical data
contained or incorporated by reference in the Registration Statement, the
Prospectus or the Exchange Act Documents, and (ii) we have no reason to believe
that the Registration Statement, as of the date it was declared effective by the
Commission, contained an untrue statement of a material fact or omitted to state
a material fact required to be stated therein or necessary in order to make the
statements therein not misleading or that the Prospectus, as of the date hereof,
includes any untrue statement of a material fact or omits to state a material
fact necessary in order to make the statements made therein, in the light of the
circumstances under which they were made, not misleading, except that in each
case we express no opinion or belief with respect to the financial statements or
schedules or other financial or statistical data contained or incorporated by
reference in the Registration Statement, the Prospectus or the Exchange Act
Documents.

     In passing upon the form of the Registration Statement and the form of the
Prospectus, we necessarily assume the correctness and completeness of the
statements made by the Company and the information included or incorporated by
reference in the Registration Statement and the 

                                      B-3

<PAGE>
 
Prospectus and take no responsibility therefor, except insofar as such
statements relate to us and as set forth in paragraph 2. above.

     This opinion is rendered to you in connection with the above-described
transaction. This opinion may not be relied upon by you for any other purpose,
or relied upon by or furnished to any other person, firm or corporation (other
than the Underwriters), without our prior written consent.

                         Very truly yours,


                                      B-4


<PAGE>
 
                                                                       Exhibit 5
                                                                       ---------



                                        March 15, 1999


Laclede Gas Company
720 Olive Street
St. Louis, MO 63101

Ladies and Gentlemen:

        I am familiar with, and am rendering this opinion to you with respect
to, the Registration Statement on Form S-3 (the "Registration Statement"), which
Laclede Gas Company, a Missouri corporation (hereinafter called the "Company"),
proposes to file with the Securities and Exchange Commission (the "Commission")
on or shortly after the date hereof under the Securities Act of 1933, as amended
(the "Act"), regarding the registration of one million two hundred and fifty
thousand shares of the Company's Common Stock ($1.00 per share par value) to be
issued and sold (hereinafter called the "Common Stock") with one Common Stock
Purchase Right attached to each share of Common Stock (which Rights, prior to
the occurrence of certain events, will not be evidenced separately from the
Common Stock), which issuance and sale were the subject of certain Resolutions
of the Company's Board of Directors dated November 19, 1998 (the "Resolutions"),
and the Missouri Public Service Commission's Order Approving Financing dated
January 12, 1999 and Supplemental Order Approving Financing dated January 27,
1999, both of which orders authorize the issuance and sale of the Common Stock
(with attached Rights), which authorization remains in effect through January 1,
2001.

        In connection with this opinion, I, or attorneys under my supervision,
have examined such documents, legal opinions and precedents, corporate and other
records of the Company and certificates of public officials and officers of the
Company as I have deemed necessary or appropriate to provide a basis for the
opinions set forth below. In this examination, I have assumed the genuineness of
all signatures, the authenticity of all documents submitted as original
documents and the conformity to original documents of all documents submitted as
certified or photostatic copies.

<PAGE>
 
Page 2
Laclede Gas Company
March 15, 1999

        On the basis of the foregoing, I am of the opinion that:

                1.      The Company has been duly incorporated and is validly 
        existing as a corporation under the laws of the State of Missouri.

                2.      Upon (a) the effectiveness of the Registration Statement
        and (b) the Company's Board of Directors having taken further action
        approving the issuance and sale of the Common Stock (with attached
        Rights), as provided for by the Resolutions, the issuance and sale of
        the Common Stock (and attached Rights) will have been duly authorized by
        all necessary corporate action on the part of the Company, and, upon
        such issuance, and following receipt by the Company of the consideration
        for such Common Stock (and attached Rights), the Common Stock (and
        attached Rights) will be validly issued, fully paid and non-assessable.

        I am a member of the Missouri Bar and, in rendering this opinion, I am 
not holding myself out as an expert on the laws of any other state.

        I hereby consent to the filing of this opinion as an exhibit to the 
Registration Statement, and I also consent to such references to me as may be 
made in the Registration Statement, as it may be amended, and in the prospectus 
relating to the Common Stock (and attached Rights).  In giving such consent, I 
do not thereby admit that I am within the category of persons whose consent is 
required pursuant to Section 7 of the Act or the rules and regulations of the 
Commission thereunder.

                                        Very truly yours,

                                        /s/ Gerald T. McNeive, Jr.

                                        Gerald T. McNeive, Jr.
GTM: af


<PAGE>
 
                                                                   Exhibit 23(b)
 
                         INDEPENDENT AUDITORS' CONSENT
 
We consent to the incorporation by reference in this Registration Statement of
Laclede Gas Company on Form S-3 of our report dated November 19, 1998,
appearing in the Annual Report on Form 10-K of Laclede Gas Company for the year
ended September 30, 1998 and to the reference to us under the heading "Experts"
in the Prospectus, which is part of this Registration Statement.
 
St. Louis, Missouri
March 11, 1999
 
/s/ Deloitte & Touche LLP

<PAGE>
 
                                                                      Exhibit 24
 
                               POWER OF ATTORNEY
 
      Each of the undersigned does hereby appoint R. C. JAUDES, D. H. YAEGER,
G. T. McNEIVE, JR. and M. C. KULLMAN, and each of them severally, his or her
true and lawful attorneys to execute in his or her name, place, and stead
(whether on behalf of Laclede Gas Company, a Missouri corporation, or as an
officer or director thereof, or by affixing or attesting the seal of said
Company, or otherwise): (1) a registration statement on Form S-3 to be filed
with the Securities and Exchange Commission (the "S-3" in connection with the
registration of: (a) up to and including 1,250,000 shares of Laclede Gas
Company common stock having a par value of $1.00 per share (the "Common Stock")
for issuance in a public offering (the "Stock Issuance"), which Stock Issuance,
subject to certain conditions, was authorized and approved by the Laclede Gas
Company Board of Directors on November 19, 1998; and (b) a like number of
related common stock purchase rights ("Related Rights") to accompany the shares
of Common Stock; (2) any filings to register, or obtain exemption, under the
securities and/or "blue sky" laws in any jurisdiction in connection with the
Stock Issuance and/or the issuance of the Related Rights (the "Blue Sky
Filings"); (3) any and all amendments (including, but not limited to post-
effective amendments), supplements and/or exhibits to the S-3 and/or any Blue
Sky Filings; and (4) all instruments necessary or advisable in connection
therewith; as well as the power and authority, as such attorney or attorneys,
to affix and attest the seal of Laclede Gas Company thereon, and to file the
same with the Securities and Exchange Commission and any other regulatory
agency in any jurisdiction. Each of said attorneys shall have power to act
hereunder with or without the others.
 
      A copy hereof shall have the same force and effect as the original.
 
      IN WITNESS WHEREOF, the undersigned have executed this instrument this
19th day of November, 1998.
 
<TABLE>
<S>                                         <C>   <C>
/s/R. E. Beumer                                   /s/W. E. Nasser
___________________________________________       ___________________________________________
R. E. BEUMER                                      W. E. NASSER
 
/s/A. B. Craig                                    /s/R. P. Stupp
___________________________________________       ___________________________________________
A. B. CRAIG                                       R. P. STUPP
 
/s/H. Givens, Jr.                                 /s/H. E. Trusheim
___________________________________________       ___________________________________________
H. GIVENS, JR.                                    H. E. TRUSHEIM
 
/s/C. R. Holman                                   /s/D. H. Yaeger
___________________________________________       ___________________________________________
C. R. HOLMAN                                      D. H. YAEGER
 
/s/R. C. Jaudes                                   /s/G. T. McNeive, Jr.
___________________________________________       ___________________________________________
R. C. JAUDES                                      G. T. McNEIVE, JR.
 
/s/M. A. Krey
___________________________________________
M. A. KREY
</TABLE>


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