4 C wy & I oe ADDRESS ALL. COMMUNICATIONS TO THE DIRECTOR ARMED FORCES INSTITUTE OF PATHOLOGY 7TH STREET AND INDEPENDENCE AVENUE sw. WASHINGTON 25, D. C. EDeC/omk ME! ‘DICAL MUSEUM MEDICAL ILLUSTRATION SERVICE DEPARTMENT OF PATHOLOGY AMERICAN REGISTRY OF PATHOLOGY Pathologic “Materials Operation Greenhouse Director Division of Biology = Medicine Atomic Energy Commission oO SUBJECT: 3 5 August 1952 Washington 25, D. C. 1. The pathologic material of Operation Greenhouse is being accessioned in the clear files of this institution. Classified data pertaining to these specimens is being withheld. However, for medical purposes it is important to have in these files the dosage of ionizing radiation received by the tissues. 2. Permission is hereby requested to include the estimated dosage of ionizing radiation with the nathologic material. No other classified information would be included, thus aking it imoossible for anyone studying these materials to correlate dose and distance. Elbe . ELBERT phere Brig Gen, MC, USA The Director