


                                                                 Exhibit 99




                             [Form of Proxy Card]



                      COMPUTATIONAL SYSTEMS, INCORPORATED


          THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS
   FOR THE SPECIAL MEETING OF STOCKHOLDERS TO BE HELD ON DECEMBER 29, 1997


            The undersigned hereby appoints Ronald G. Canada, Kenneth R. Piety
and Carlo Gorla, each of them with full power of substitution, as proxies of
the undersigned, and hereby authorizes such member or members to represent and
to vote all shares of common stock, no par value, of CSI held of record by the
undersigned as of the close of business on November 19, 1997, at the Special
Meeting of stockholders of CSI to be held on December 29, 1997, and at any
adjournments or postponements thereof, upon all subjects that may properly
come before the meeting including matters described in the Proxy
Statement/Prospectus furnished herewith.  The undersigned hereby revokes any
previous proxies with respect to matters covered by this Proxy.

            This Proxy, when properly executed, will be voted in the manner
marked herein by the undersigned stockholder.  THE BOARD RECOMMENDS A VOTE FOR
THE PROPOSAL.  TO VOTE IN ACCORDANCE WITH THE BOARD'S RECOMMENDATIONS, JUST
SIGN AND RETURN THIS PROXY; NO BOXES NEED TO BE CHECKED.

            Your vote is important.  Failure to sign and return this Proxy, or
attend the Special Meeting and vote by ballot, will have the same effect as a
vote against the merger.

                                                              SEE REVERSE SIDE
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            The Board of Directors of CSI  recommends a vote FOR:

      1.    Approval and Adoption of the Agreement and Plan of Merger dated as
            of October 17, 1997 among CSI, Emerson Electric Co., a Missouri
            corporation ("Emerson"), and Emersub LVII, Inc., a Delaware
            corporation and wholly-owned subsidiary of Emerson. The Merger
            Agreement is attached to the accompanying Proxy
            Statement/Prospectus as Annex A.

      FOR   [ ]       AGAINST  [ ]        ABSTAIN  [ ]

      2.    Approval of any proposal to adjourn or postpone the meeting.

      FOR   [ ]       AGAINST  [ ]        ABSTAIN  [ ]

      3.    In the discretion of the proxies, to vote upon such other business
            as may properly come before the meeting, including any adjournment
            or postponement thereof.

      FOR   [ ]       AGAINST  [ ]        ABSTAIN  [ ]



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                                             (Date)


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                                             (Signature)


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                                             (Title)


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                                             (Signature, if held jointly)

                                            When shares are held by joint
                                            tenants, both should sign.
                                            When signing as attorney,
                                            executor, administrator,
                                            trustee, guardian, corporate
                                            officer or partner, please give
                                            full title as such.  If a
                                            corporation, please sign in
                                            corporate name by president or
                                            other authorized officer.  If a
                                            partnership, please sign in
                                            partnership name by authorized
                                            person.  This Proxy votes all
                                            shares held in all capacities.


                   PLEASE MARK, SIGN, DATE AND MAIL PROMPTLY

