1947 Manyrelevant papers from this year relate to Hamilton's attempts to get papers declassified, including those which dealt with human subject experiments. The rat and man paper was not declassified, but others were after minor changes and deletions. Many letters were exchanged between Hoyland D. Young, director of information division at Argonne, and Hamilton. (1948 and 49--not muchto note) 1950 There is correspondence between Wright H. Langham and Hamilton and between Langham and Harry Foreman at Crocker Lab concerning the patients who were once injected with plutonium in Rochester. Wright suggested he could get two patients to be treated with calcium ethylenediaminetetra-acetate (EDTA) as a therapeutic test. He was concerned about whether or not to experiment with versene (calcium versenate) on humans, and how he could avoid liability. He was thinking ofstarting up on Py238 experiments again. (between Dec 12 and 18, 50). Foreman replied with a letter detailing whowas involved in studies of various compounds on humans. For example Rubin had given EDTA to humans. (Dec. 20, 50). Joe Howland's role on the versene experiment wasthat he had contact with the patients; the patients were under the care of Dr. Waterhouse, who was associated with the Strong Memorial Hospital and with Howland's group. They had taken the urine samples (Dec. 23, 50). A letter to Hamilton from Thomas L. Shipman refuses approval for using verseneclinically as yet, but to follow the lead (Dec. 27, 50). Versene is a chelating agent, and could be used for excreting Pu from the bones; but it was also very toxic. In 1951, there is a progress report on the Use of Chelatin Agents for Accelerating Excretion of Radioelements, including EDTA and Fe3, by man. 1953 The following studies on animals were under way: astatine studies, on the selective localization in the thyroid of astatine, for possible later thyroid carcinogenesis and pituitary tumors tracer studies with all sorts of radioelements (scandium,thulium, tungsten, iodine, astatine, versene) chelating studies on the effect of versene in diet by parenteral injection into animals with plutonium and curium,and on the use of berkelium or californium as tracers radioautography, to study the deposition and localization of either radioelements or radioactive particles, including astatine studies and plutonium inhalation studies Scott informed Dr. L.K. Bustad that he had done no studies of versene and removal of lung aerosols, only of versene and the removal of Pu from soft tissue and intramuscular injection sites. (March 4, 53) A letter from Hamilton to F.G. Nicholls in answer to a query reveals that Hamilton had no experience in the USA ofthe effect of the Lawrence Berkeley Laboratory Archives and Records Office Human Radiation Experiments Search and Retrieval Project Anna Berge Research Notes Electronic Document Title: Bancroft/EOL April 4, 1994 3

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