EXHIBIT 99.4


                              CLASS B COMMON STOCK

                               OLSTEN CORPORATION
                              175 BROAD HOLLOW ROAD
                          MELVILLE, NEW YORK 11747-8905

           THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS

The undersigned hereby appoints Edward A. Blechschmidt, Stuart Olsten and
Laurin L. Laderoute, Jr., and each of them, with full power of substitution,
as the proxy or proxies of the undersigned to vote all shares of class B
common stock of Olsten Corporation ("Olsten") which the undersigned is
entitled to vote at the special meeting of stockholders of Olsten to be held
at Olsten Corporation, 175 Broad Hollow Road, Melville, New York on March  ,
2000, at      a.m. eastern time, and at any adjournment or postponement
thereof, with all powers that the undersigned would have if personally
present thereat upon the following matters and upon such matters as may
properly come before the meeting:

                   (CONTINUED, AND TO BE VOTED, SIGNED AND DATED ON OTHER SIDE)




                                                          Please mark
                                                          your votes as
                                                          indicated in
                                                          this example    /X/

The Board of Directors recommends that you vote FOR each of Proposals 1-7.


1. To approve the merger and adopt the            FOR    AGAINST    ABSTAIN
Agreement and Plan of Merger dated as of          / /      / /        / /
 August 17, 1999 by and among Adecco SA,
a societe anonyme organized under the laws
of Switzerland, Staffing Acquisition Corporation,
a Delaware corporation and a wholly-owned
subsidiary of Adecco, and Olsten.


2. To approve the Gentiva Health Services         / /      / /        / /
Executive Officers Bonus Plan.

3. To approve the Gentiva Health Services         / /      / /        / /
1999 Stock Incentive Plan.


4. To approve the Gentiva Health Services        FOR    AGAINST    ABSTAIN
Stock & Deferred  Compensation Plan for          / /      / /        / /
Non-Employee Directors.


5. To approve the Gentiva Health Services         / /      / /        / /
Employee Stock Purchase Plan.

6. To approve any adjournments to or              / /      / /        / /
postponements of the special meeting.

7. In their discretion, the proxies are          / /      / /        / /
authorized to vote upon such other business
as may properly come before the meeting.


                                   THIS PROXY WHEN PROPERLY EXECUTED WILL
                                   BE VOTED IN THE MANNER DIRECTED HEREIN BY
                                   THE UNDERSIGNED STOCKHOLDER. IF NO DIRECTION
                                   IS MADE, THIS PROXY WILL BE VOTED FOR
                                   PROPOSALS 1-7.

                                   Dated:____________________________ , 2000


                                   -----------------------------------------
                                            Signature of Stockholder


                                   -----------------------------------------
                                            Signature if held jointly

                                   Please sign exactly as name appears hereon.
                                   When shares are held by joint tenants, both
                                   should sign. When signing as attorney,
                                   executor, administrator, trustee or guardian,
                                   please give full title as such. If a
                                   corporation, please sign in full corporate
                                   name by President or other authorized person.

PLEASE MARK, SIGN, DATE AND RETURN THE PROXY CARD PROMPTLY USING THE ENCLOSED
ENVELOPE.