THE SERVICEMASTER COMPANY
                                 as the Company

                                       and

                          HARRIS TRUST AND SAVINGS BANK
                                   as Trustee





                          FOURTH SUPPLEMENTAL INDENTURE

                           Dated as of August 10, 1999

             (Supplemental to Indenture Dated as of August 15, 1997)

                           Series 7_ % Notes due 2009







         FOURTH  SUPPLEMENTAL  INDENTURE dated as of August 10, 1999 between The
ServiceMaster  Company, a Delaware  corporation,  as the Company (the "Company")
and Harris Trust and Savings Bank, an Illinois banking  corporation,  as Trustee
(the "Trustee").

         WHEREAS, each of the Company's predecessors,  The ServiceMaster Company
Limited Partnership  ("SMCLP") and ServiceMaster  Limited Partnership  ("SMLP"),
and the Trustee  executed and delivered an Indenture dated as of August 15, 1997
(as  amended by the First  Supplemental  Indenture  dated as of August 15,  1997
among SMCLP, SMLP and the Trustee, the Second Supplemental Indenture dated as of
January 1, 1998  between the Company and the Trustee and the Third  Supplemental
Indenture  dated as of March 2, 1998  between the Company and the  Trustee,  the
"Original  Indenture")  providing  for  the  issuance  from  time to time of its
debentures,  notes or other evidences of indebtedness in one or more series (the
"Securities"); and

         WHEREAS,  each of SMCLP  and SMLP  has  been  merged  with and into the
Company in a manner permitted by Sections 6.01 of the Original Indenture and the
Company,  as the surviving Person of each such merger,  has succeeded to each of
their  respective  obligations  under the Original  Indenture in accordance with
Section 6.02 of the Original Indenture; and

         WHEREAS,  pursuant to the terms of the Original Indenture,  the Company
wishes to provide for the  establishment of a new series of its Securities known
as the 7_ % Notes due 2009 (the "2009 Notes"); and

         WHEREAS,  Section 10.01(5) of the Original  Indenture provides that the
Original  Indenture  may be amended  without  the  consent of the holders of the
Securities in order to establish the form or forms or terms of Securities of any
series or of the coupons  appertaining  to such  Securities  pursuant to Section
2.03 of the Original Indenture; and

         WHEREAS, all conditions and requirements  necessary to make this Fourth
Supplemental  Indenture a valid and binding  instrument in  accordance  with its
terms and the terms of the Original Indenture have been satisfied.

         NOW, THEREFORE:

         In  consideration  of the premises and of the mutual  covenants  herein
contained, and in order to provide for payment of the principal of (and premium,
if any) and interest on all of the  Securities,  according  to their tenor,  the
Company and the Trustee hereby covenant and agree:

                                       1




         SECTION 1. For all  purposes  of this  Fourth  Supplemental  Indenture,
except as otherwise expressly provided or unless the context otherwise requires,
all  capitalized  terms  used and not  defined  herein  that are  defined in the
Original  Indenture  shall have the  meanings  assigned to them in the  Original
Indenture.

         Section 1.01 of the Original  Indenture is amended and  supplemented as
follows, in each case solely for purposes of the New Securities:

         "Adjusted  Treasury Rate" means,  with respect to any redemption  date,
the rate per annum equal to the semiannual  equivalent  yield to maturity of the
Comparable  Treasury Issue,  assuming a price for the Comparable  Treasury Issue
(expressed  as a percentage of its  principal  amount)  equal to the  Comparable
Treasury Price for such redemption date.

         "Comparable  Treasury Issue" means the United States Treasury  security
selected by a Quotation  Agent as having a maturity  comparable to the remaining
term of the  notes  to be  redeemed  that  would  be  utilized,  at the  time of
selection and in accordance with customary  financial  practice,  in pricing new
issues of corporate debt securities of comparable maturity to the remaining term
of such notes.

         "Quotation Agent" means the Reference  Treasury Dealer appointed by the
Trustee after consultation with ServiceMaster. "Reference Treasury Dealer" means
(i)  initially  J.P.  Morgan  Securities  Inc.  and its  respective  successors;
provided,  however,  that if the  foregoing  shall  cease to be a  primary  U.S.
Government  securities  dealer in New York City (a "Primary  Treasury  Dealer"),
ServiceMaster shall substitute therefor another Primary Treasury Dealer; or (ii)
any other Primary  Treasury  Dealer  selected by the Trustee after  consultation
with ServiceMaster.

         "Comparable Treasury Price" means, with respect to any redemption date,
(i) the average of the Reference  Treasury Dealer Quotations for such redemption
date,  after  excluding the highest and lowest such  Reference  Treasury  Dealer
Quotations,  or (ii) if the  Trustee  obtains  fewer than  three such  Reference
Treasury Dealer Quotations, the average of all such Quotations.

         "Reference  Treasury  Dealer  Quotations"  means,  with respect to each
Reference Treasury Dealer and any redemption date, the average, as determined by
the Trustee,  of the bid and asked  prices for the  Comparable  Treasury  Issues
(expressed  in each case as a  percentage  of its  principal  amount)  quoted in
writing to the  Trustee by such  Reference  Treasury  Dealer at 5:00 p.m. on the
third Business Day preceding such redemption date.

                                       2




         SECTION  2.  Pursuant  to  Sections  2.01  and  2.03  of  the  Original
Indenture,  there is hereby authorized and the Company shall issue the following
series of Securities, the form of the Security of the series to be substantially
in the form set forth in Exhibit 1:

          (a) A series of notes under the Original  Indenture  designated as the
7_ % Notes due 2009 (the "2009 Notes"). The series of 2009 Notes will be limited
to $250,000,000 aggregate principal amount and will mature on August 15, 2009 at
100% of their principal amount, unless earlier redeemed.  The 2009 Notes will be
issuable in denominations  of $1,000 or integral  multiples  thereof.  Each 2009
Note will bear  interest  from  August  10,  1999 at the rate of 7_ % per annum,
payable semi-annually (to holders of record at the close of business on February
1 or August 1 immediately  preceding  the interest  payment date) on February 15
and August 15 of each year  beginning  February 15, 2000. The 2009 Notes will be
redeemable, at any time prior to maturity at the option of the Company, in whole
or in part, upon not less than 30 or more than 60 days prior written notice,  at
a redemption price equal to the greater of (i) 100% of their principal amount or
(ii) as determined by a Quotation  Agent,  the sum of the present  values of the
Remaining  Scheduled  Payments of principal and interest  thereon (not including
any portion of such payments of interest  accrued as of the date of  redemption)
discounted to the  redemption  date, on a semi-annual  basis  assuming a 360-day
year  consisting of twelve 30-day months at the Adjusted  Treasury Yield plus 20
basis points, together with all accrued but unpaid interest, if any, to the date
of redemption  in either case.  The 2009 Notes will be issued only as Registered
Global Securities,  without coupons,  held by the Depositary,  which will be the
Depository Trust Company,  and will not be issued in definitive  registered form
except pursuant to Section 2.07 of the Original Indenture.

         SECTION 3. Nothing in this Fourth Supplemental Indenture,  expressed or
implied,  is intended or shall be construed to confer upon or give to any person
or corporation,  other than the parties hereto and the holders of the 2009 Notes
any  right,  remedy  or claim  under or by reason  of this  Fourth  Supplemental
Indenture or any covenant,  stipulation,  promise or agreement contained herein;
all the covenants, stipulations,  promises and agreements contained herein being
for the sole and exclusive  benefit of the parties hereto and their  successors,
and the holders from time to time of the New Securities.

                                       3




         SECTION 4. This Fourth Supplemental  Indenture shall form a part of the
Original Indenture for all purposes and every holder of Securities heretofore or
hereafter  authenticated  and delivered  under the Original  Indenture  shall be
bound hereby;  provided that the supplemental  definitions provided in Section 1
of this Fourth  Supplemental  Indenture  shall apply only to the New Securities.
The Original Indenture as supplemented by this Fourth Supplemental  Indenture is
hereby in all respects ratified and confirmed.

         SECTION 5. The Trustee,  for itself and its  successor  or  successors,
accepts  the  trust  of  the  Original  Indenture  as  amended  by  this  Fourth
Supplemental Indenture,  and agrees to perform the same, but only upon the terms
and  conditions  set forth in the Original  Indenture,  including  the terms and
provisions  defining and limiting the  liabilities and  responsibilities  of the
Trustee,  which terms and  provisions  shall in like manner define and limit its
liabilities and  responsibilities in the performance of the trust created by the
Original Indenture,  and, without limiting the generality of the foregoing,  the
recitals  contained herein shall be taken as the statements of the Company,  and
the Trustee assumes no responsibility for their  correctness.  The Trustee makes
no representations as to the validity or sufficiency of this Fourth Supplemental
Indenture  other than as to the  validity of its  execution  and delivery by the
Trustee.

         SECTION 6. This Fourth  Supplemental  Indenture  may be executed in any
number  of  counterparts,   each  of  which  shall  be  an  original;  but  such
counterparts shall together constitute but one and the same instrument.

                                       4








                                            SIGNATURES

         IN  WITNESS  WHEREOF,  the  parties  hereto  have  caused  this  Fourth
Supplemental  Indenture to be duly  executed,  all as of the date first  written
above.


                           The ServiceMaster Company,
                                 as the Company


                                                     By:
                                                          Name:
                                                          Title:


                         Harris Trust and Savings Bank,
                                                          as Trustee


                                                     By:
                                                          Name:
                                                          Title:
                                       5








STATE OF ILLINOIS )
                  )
COUNTY OF DUPAGE  )

         BEFORE  ME, the  undersigned  authority,  on this ___ day of  ________,
1999, personally appeared ______________________, _______________________ of The
ServiceMaster  Company, a Delaware corporation (the "Company"),  known to me (or
proved to me by  introduction  upon the oath of a person  known to me) to be the
person and officer whose name is subscribed  to the  foregoing  instrument,  and
acknowledged to me that he/she executed the same as the act of such  corporation
for the purposes and consideration  herein expressed and in the capacity therein
stated.

         GIVEN UNDER MY HAND AND SEAL THIS ____ DAY OF       ___________, 1999.

(SEAL)


                                        NOTARY PUBLIC, STATE OF ILLINOIS
                                        Print Name:
                                        Commission Expires:

                                       6







STATE OF ILLINOIS )
                  )
COUNTY OF COOK    )

         BEFORE  ME, the  undersigned  authority,  on this ___ day of  ________,
1999, personally appeared  _______________________,  _______________________  of
Harris Trust and Savings Bank, an Illinois banking corporation,  known to me (or
proved to me by  introduction  upon the oath of a person  known to me) to be the
person and officer whose name is subscribed  to the  foregoing  instrument,  and
acknowledged  to me that he/she  executed  the same as the act of such trust for
the purposes and  consideration  herein  expressed  and in the capacity  therein
stated.

         GIVEN UNDER MY HAND AND SEAL THIS _____ DAY OF     __________, 1999.

(SEAL)


                                        NOTARY PUBLIC, STATE OF ILLINOIS
                                        Print Name:
                                        Commission Expires:

                                       7







                                      [FORM OF FACE OF NOTE]

                                    Exhibit 1


         Unless this certificate is presented by an authorized representative of
The Depository Trust Company (55 Water Street, New York, New York) to the issuer
or its  agent  for  registration  of  transfer,  exchange  or  payment,  and any
certificate issued is registered in the name of Cede & Co. or such other name as
requested by an authorized  representative  of the Depository  Trust Company and
any payment is made to Cede & Co., ANY TRANSFER,  PLEDGE OR OTHER USE HEREOF FOR
VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL  since the  registered  owner
hereof, Cede & Co., has an interest herein.


No.                                                       $


                                     The ServiceMaster Company

                                             7_ % Note

                                        Due August 15, 2009

                                       8



         The ServiceMaster Company, a Delaware corporation (the "Company", which
term includes any successor corporation under the Indenture hereinafter referred
to), for value received,  hereby promises to pay to , or registered  assigns, at
the office or agency of the Company in New York,  New York, the principal sum of
on , in  the  coin  or  currency  of the  United  States,  and to pay  interest,
semi-annually on , and , of each year, commencing
               , on said principal sum at said office or agency, in like coin or
currency, at the rate per annum specified in the title of this Note, from the or
the , as the case may be, next preceding the date of this Note to which interest
has been paid or duly  provided  for,  unless the date hereof is a date to which
interest has been paid or duly provided for, in which case from the date of this
Note,  or unless no interest has been paid or duly  provided for on these Notes,
in which case from , until  payment of said  principal sum has been made or duly
provided  for;  provided,  that payment of interest may be made at the option of
the  Company by check  mailed to the address of the person  entitled  thereto as
such  address  shall  appear on the  Security  Register  or by wire  transfer as
provided in the Indenture.  Notwithstanding the foregoing, if the date hereof is
after the first day of or , as the case may be, and before the following or
               , this Note shall bear interest from such or ; provided,  that if
the Company  shall default in the payment of interest due on such or , then this
Note shall bear interest from the next preceding or , to which interest has been
paid or duly  provided for or, if no interest has been paid or duly provided for
on these  Notes,  from . The  interest  so  payable  on any or will,  subject to
certain exceptions  provided in the Indenture referred to on the reverse hereof,
be paid to the  person in whose  name this  Note is  registered  at the close of
business on or , as the case may be, next preceding such
                 or                 , whether or not such day is a Business Day.

         Reference is made to the further  provisions  of this Note set forth on
the reverse hereof. Such further provisions shall for all purposes have the same
effect as though fully set forth at this place.

         This Note shall not be valid or become obligatory for any purpose until
the certificate of authentication  hereon shall have been manually signed by the
Trustee under the Indenture referred to on the reverse hereof.


                                       9





         IN  WITNESS  WHEREOF,   The  ServiceMaster   Company  has  caused  this
instrument  to be  signed  manually  or by  facsimile  by  its  duly  authorized
officers.



         Dated:

                                        THE SERVICEMASTER COMPANY



                                       By
                                      Name:
                                     Title:


                                       By
                                      Name:
                                     Title:


Attest:

                                       10



                                   CERTIFICATE OF AUTHENTICATION

         This is one of the Securities of the series designated therein referred
to in the within-mentioned Indenture.

         Dated:                             Harris Trust and Savings Bank,
                                                 as Trustee


                                            By         Authorized Signatory

                                       11



                                          REVERSE OF NOTE
                                     The ServiceMaster Company

                                             7_ % Note
                                        Due August 15, 2009

         This Note is one of a duly authorized issue of debentures, notes, bonds
or other  evidences  of  indebtedness  of the  Company  (hereinafter  called the
"Securities") of the series  hereinafter  specified,  all issued or to be issued
under and  pursuant  to an  indenture  dated as of August 15,  1997  between the
Company (as  successor by merger to each of The  ServiceMaster  Company  Limited
Partnership and ServiceMaster  Limited Partnership,  and their respective rights
and obligations  under the Indenture  hereinafter  referred to) and Harris Trust
and Savings Bank, as Trustee (hereinafter called the "Trustee") (as supplemented
by the First  Supplemental  Indenture  dated as of August 15, 1997 among  SMCLP,
SMLP and the Trustee,  the Second Supplemental  Indenture dated as of January 1,
1998 between the Company and the Trustee, the Third Supplemental Indenture dated
as of  March  2,  1998  between  the  Company  and the  Trustee  and the  Fourth
Supplemental  Indenture  dated as of August 10, 1999 between the Company and the
Trustee,  the "Indenture"),  to which Indenture and all indentures  supplemental
thereto and all terms of a particular series of Securities  established pursuant
to Section 2.03 of the Indenture  reference is hereby made for a description  of
the rights, limitations of rights, obligations, duties and immunities thereunder
of the Trustee,  the Company and the Holders of the  Securities.  The Securities
may be issued in one or more  series,  which  different  series may be issued in
various  aggregate  principal  amounts,  may mature at different times, may bear
interest (if any) at  different  rates,  may be subject to different  redemption
provisions (if any), may be subject to different sinking,  purchase or analogous
funds (if any) and may otherwise vary as in the Indenture provided. This Note is
one of a series designated as the 7_ % Notes due 2009 of the Company, limited in
aggregate principal amount to $250,000,000.

         Interest  will be  computed  on the basis of a  360-day  year of twelve
30-day months.  The Company shall pay interest on overdue  principal and, to the
extent lawful,  on overdue  installments of interest at the rate per annum borne
by  this  Note.  If a  payment  date is not a  Business  Day as  defined  in the
Indenture  at a place of payment,  payment may be made at that place on the next
succeeding  day that is a Business  Day,  and no interest  shall  accrue for the
intervening period.

                                       12




         In case an Event of Default as defined in the  Indenture,  with respect
to the 7_ % Notes due 2009, shall have occurred and be continuing, the principal
hereof and the interest accrued hereon,  if any, may be declared,  and upon such
declaration  shall  become,  due and payable in the manner,  with the effect and
subject to the conditions provided in the Indenture.

         The Indenture  contains  provisions  which provide that,  without prior
notice to any Holders,  the Company and the Trustee may amend the  Indenture and
the  Securities  of any series  with the  written  consent  of the  Holders of a
majority in aggregate  principal  amount of the  outstanding  Securities  of all
series  affected  (all such series  voting as one  class),  and the Holders of a
majority in aggregate  principal  amount of the  outstanding  Securities  of all
series to be affected (all such series voting as one class) by written notice to
the Trustee may waive future compliance by the Company with any provision of the
Indenture or the Securities of such series;  provided that,  without the consent
of each Holder of the Securities of each series affected  thereby,  an amendment
or waiver,  including a waiver of past defaults,  may not: (i) extend the stated
maturity of the principal of, or any sinking fund  obligation or any installment
of interest on, such Holder's  Security,  or reduce the principal amount thereof
or the rate of  interest  thereon  (including  any amount in respect of original
issue  discount),  or any premium  payable  with respect  thereto,  or adversely
affect the rights of such Holder under any  mandatory  redemption  or repurchase
provision or any right of redemption or repurchase at the option of such Holder,
or reduce the amount of the  principal of an Original  Issue  Discount  Security
that would be due and payable upon an acceleration of the maturity or the amount
thereof  provable in bankruptcy,  or change any place of payment  where,  or the
currency  in which,  any  Security  or any  premium or the  interest  thereon is
payable,  or impair the right to institute suit for the  enforcement of any such
payment  on or after  the due date  therefor;  (ii)  reduce  the  percentage  in
principal amount of outstanding Securities of the relevant series the consent of
whose Holders is required for any such supplemental indenture, for any waiver of
compliance  with certain  provisions  of the  Indenture or certain  Defaults and
their consequences  provided for in the Indenture;  (iii) waive a Default in the
payment of  principal  of or interest on any  Security of such  Holder;  or (iv)
modify any of the provisions of the Indenture governing supplemental  indentures
with the consent of Securityholders except to increase any such percentage or to
provide that certain other  provisions  of the  Indenture  cannot be modified or
waived without the consent of the Holder of each outstanding  Security  affected
thereby.

                                       13




         It  is  also  provided  in  the  Indenture  that,  subject  to  certain
conditions,  the Holders of at least a majority in aggregate principal amount of
the outstanding Securities of all series affected (voting as a single class), by
notice to the  Trustee,  may waive an existing  Default or Event of Default with
respect to the Securities of such series and its consequences,  except a Default
in the payment of  principal  of or interest on any  Security or in respect of a
covenant  or  provision  of the  Indenture  which  cannot be modified or amended
without the consent of the Holder of each outstanding  Security  affected.  Upon
any such  waiver,  such Default  shall cease to exist,  and any Event of Default
with respect to the Securities of such series arising  therefrom shall be deemed
to have been cured, for every purpose of the Indenture; but no such waiver shall
extend to any  subsequent  or other  Default  or Event of  Default or impair any
right consequent thereto.

         The Indenture  provides that a series of Securities  may include one or
more tranches (each a "tranche") of Securities, including Securities issued in a
periodic  offering.  The  Securities of different  tranches may have one or more
different terms, including  authentication dates and public offering prices, but
all the  Securities  within  each  such  tranche  shall  have  identical  terms,
including  authentication  date and public offering price.  Notwithstanding  any
other provision of the Indenture, subject to certain exceptions, with respect to
sections of the Indenture concerning the execution,  authentication and terms of
the  Securities,  redemption  of  the  Securities,  Events  of  Default  of  the
Securities,  defeasance of the Securities and amendment of the Indenture, if any
series of  Securities  includes  more than one tranche,  all  provisions of such
sections  applicable  to any  series  of  Securities  shall  be  deemed  equally
applicable  to each  tranche of any series of  Securities  in the same manner as
though originally  designated a series unless otherwise provided with respect to
such  series  or  tranche  pursuant  to a  board  resolution  or a  supplemental
indenture establishing such series or tranche.

         No reference  herein to the  Indenture and no provision of this Note or
of the Indenture  shall alter or impair the obligation of the Company,  which is
absolute and unconditional, to pay the principal of and any premium and interest
on this Note in the manner,  at the place, at the respective  times, at the rate
and in the coin or currency herein prescribed.

         The  Notes are  issuable  initially  only in  registered  form  without
coupons in  denominations  of $1,000 and any multiple of $1,000 at the office or
agency of the Company in the Borough of Manhattan,  The City of New York, and in
the manner and  subject  to the  limitations  provided  in the  Indenture,  but,
without the payment of any service  charge,  Notes may be  exchanged  for a like
aggregate principal amount of Notes of other authorized denominations.

                                       14




         The Notes  will be  redeemable,  at any time prior to  maturity  at the
option of the Company,  in whole or in part,  upon not less than 30 or more than
60 days prior written notice,  at a redemption price equal to the greater of (i)
100% of their principal  amount or (ii) as determined by a Quotation  Agent, the
sum of the present values of the Remaining  Scheduled  Payments of principal and
interest thereon (not including any portion of such payments of interest accrued
as  of  the  date  of  redemption)  discounted  to  the  redemption  date,  on a
semi-annual  basis assuming a 360-day year consisting of twelve 30-day months at
the Adjusted Treasury Yield plus 20 basis points,  together with all accrued but
unpaid interest, if any, to the date of redemption in either case.

         Upon due presentment  for  registration of transfer of this Note at the
office or agency of the  Company in the  Borough of  Manhattan,  The City of New
York, a new Note or Notes of  authorized  denominations  for an equal  aggregate
principal amount will be issued to the transferee in exchange therefor,  subject
to the limitations provided in the Indenture,  without charge except for any tax
or other governmental charge imposed in connection therewith.

         The  Company,  the  Trustee and any agent of the Company or the Trustee
may deem and treat the  registered  Holder hereof as the absolute  owner of this
Note (whether or not this Note shall be overdue and notwithstanding any notation
of ownership or other writing hereon),  for the purpose of receiving payment of,
or on account of, the principal  hereof and,  subject to the provisions  hereof,
interest  hereon,  and for all other  purposes,  and neither the Company nor the
Trustee  nor any agent of the  Company or the  Trustee  shall be affected by any
notice to the contrary.

         No recourse under or upon any obligation,  covenant or agreement of the
Company in the Indenture or any indenture  supplemental  thereto or in any Note,
or because of any  indebtedness  evidenced  thereby,  shall be had  against  any
incorporator,  stockholder,  officer or director,  as such,  past,  present,  or
future, of the Company or any successor corporation thereof,  either directly or
through the Company or any successor corporation, under any rule of law, statute
or  constitutional  provision or by the  enforcement of any assessment or by any
legal or equitable  proceeding or otherwise,  all such liability being expressly
waived and released by the  acceptance  hereof and as part of the  consideration
for the issue hereof.

         Terms used  herein  which are defined in the  Indenture  shall have the
respective meanings assigned thereto in the Indenture.

                                       15




         FOR VALUE RECEIVED, the undersigned hereby sell(s), assign(s) and
transfer(s) unto

[PLEASE PRINT OR TYPE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE]

[PLEASE INSERT SOCIAL SECURITY OR OTHER
         IDENTIFYING NUMBER OF ASSIGNEE]




the within Note and all rights thereunder,  hereby irrevocably  constituting and
appointing  such  person  attorney  to  transfer  such  Note on the books of the
Company, with full power of substitution in the premises.


Dated:


NOTICE:           The signature to this assignment must correspond with the name
                  as  written  upon  the  face  of  the  within  Note  in  every
                  particular  without  alteration or  enlargement  or any change
                  whatsoever.

                                       16