UNITED STATES ATOMIC ENERGY COMMISSION WASHINGTON 25, D. C. " November 9, 1953 Dr. Ralph Carlisle Smith Los Alamos Scientific Laboratory P. ©, Box 1663 Los Alamcs, New Mexico Dear Smitty: Reference is made to your letter dated September 9, 1953, forwarding a draft of a proposed Classification Guide for Castie. This is to advise you that the draft guide which you forwarded is acceptable and approved provided the following changes are made: RoE iF @ }