ATTACHMENT C (TAB H)

  Security List and Accompanying Letter dated December 20,
1952 concerning February 24, 1952 Joint Panel Meeting.              


                RESEARCH AND DEVELOPMENT BOARD
 			WASHINGTON 25, D.C.

20 December 1951

Mr. Kenneth Kasschaw
Director, Research & Medicine
Office of Oak Ridge Operations
U.S. Atomic Energy Commission
Box E
Oak Ridge, Tennessee

Dear Mr. Kasschaw:

     This letter will confirm our telephone conversation of
today.

     Inasmuch as Dr. Shields Warren had stressed the
importance of early contact with your laboratory, I am happy
to talk with you today in the absence of Dr. Woodruff.

     As you requested I am enclosing a copy of the security
list forwarded from the Office of the Secretary of Defense to
Mr. Bryan F. La Plante, Washington Area Security Operations,
U.S. Atomic Energy Commission.  This list represents all
possible persons who may attend the meeting.  Actual
attendance will probably prove to be 75%-80% of this total.

     I am sure Dr. Aub will accept Dr. Warren's suggestions
(reinforced by yourself) relative to which units would most
profitably be visited by the Joint Panel on Medical Aspects of
Atomic Warfare; however, final decision will rest in Dr. Aub
hands. Since only one day can be devoted to our inspection
tour, two of the units will more than fill the time as you
pointed out during our conversation.

     The tentative schedule will be as follows:

     1.   Sunday morning, 24 February 1952 - Arrival in     
     Knoxville (from Washington area, mostly by train;      
     elsewhere, probably by air).  Names of individuals     
     and places and times of arrival will be furnished      
     you at a later date.

     2.   Sunday afternoon, 24 February 1952 - Ad Hoc group
          meeting. Room to accommodate 15-20 people will be
          sufficient.

     3.   Monday, 25 February 1952 - Visits to facilities   
          and possible very short briefings, re: the 
          facilities which we will be unable to see.  If you
          and your staff feel the latter will overload a    
          heavy schedule, it may easily be deleted.

ORGANIZATION & MANAGEMENT

Mr. Kenneth Kasschaw (cont.)                20 December 1951

     4.   Tuesday, 26 February 1952 - The business meeting  
     of the panel will require most of the day.  (Room      
     to accommodate 25-30 people.)

     5.   Tuesday evening, 26 February 1952 - Departure, if
          train and plane schedules can be met conveniently.

     It is my understanding that Dr. Warren's office will
forward you final approval of the security list for attendance
at the meeting.  The office will be in contact with you from
time to time as definite plans materialize.

                                   Sincerely yours,



                                   Signed: Thomas B. Spencer, M.D.

                                   THOMAS B. SPENCER, M.D.
                                   Executive Director
                                   Committee on Medical Sciences

Enclosures: (1)

cc:  Dr. Joseph C. Aub
     Dr. Shields Warren