Attachment 7
                                 
 
In Reply Refer To:
M:AHH

                                   Oak Ridge, Tennessee
                                   March 15, 1948


Dr. Hoylande D. Young
Director, Information Division
Argonne National Laboratory
P.O. Box 5207
Chicago 80, Illinois

Dear Dr. Young:

In accordance with your recent request, the following documents
were reviewed for reconsideration of their classification:

     CH-3592, entitled        "Uranium Excretion Studies."
     CH-3607, entitled        "Distribution and Excretion of
                              Plutonium in Two Human Subjects."
     CH-3696, entitled        "An Introduction to the Toxicology
                              of Uranium.
     MUC-ERR-209, entitled    "Distribution and Excretion of
                              Plutonium."

Since classification of these documents has been so controversial,
and in view of the recurring requests, they were forwarded to the
Division of Biology and Medicine in Washington for a final policy
decision.

It is the feeling of the Division of Biology and Medicine, the
Advisory Committee for Biology and Medicine, and the Office of
Technical Information of the Atomic Energy Commission that these
documents should not be declassified.  While I am sure we both
fully appreciate the desirability of declassification, I feel
certain that the various individuals concerned will also understand
and appreciate the reasons for this decision.

I trust this information fulfills your request.  With kind regards,

Distribution:                 Sincerely yours,
Copies #1 & Addressee
"    " 2 & 3 - Class. Files
"    " 4 & 5 - Medical Advisor's
               Office         Albert H. Holland, Jr., M.D.
                              Medical Advisor
Repository   Oak Ridge Opr.
	     Records Holding Task Group

Collection   CLASS. DOC. 1944-94

BOX NO.      168 72,889

FOLDER	     Bldg. 2714-14 Vault