A letter written by the defendant Sievers to the defendant Rudolf Brandt, dated 11 April 1944, points to the fact that Karl Brandt knew of still other such experiments. The letter states, that in accordance with instructions he, Sievers, had contacted Karl Brandt, at Beelitz, and had reported to him concerning the activities of a certain Dr. Hirt, who the evidence shows had been experimenting with Lost gas upon concentration camp inmates at Natzweiler. In the letter, Sievers states, further, that Karl Brandt had told him that he would be in Strasbourg in April and would then discuss details with Dr. Hirt. Knowledge of the conduct of at least some of the experiments was confirmed by Karl Brandt when he testified in his own behalf. He stated that pursuant to competent authority he had engaged in studies concerning defense measures against poison gas. He admitted receiving a report from Hirt, and that one reading the report could reach the conclusion that human beings had been experimented upon in connection with injuries from Lost gas. FREEZING, MALARIA, BONE, MUSCLE AND NERVE REGENERATION AND BONE TRANSPLANTATION, SEA-WATER, STERILIZATION, AND TYPHUS EXPERIMENTS The evidence does not show beyond a reasonable doubt that Karl Brandt is criminally responsible on account of the experiments with which he is charged under these specifications. The defendant Karl Brandt certainly knew that medical experiments were carried out in concentration camps upon human subjects, that the experiments caused suffering, injury, and death. By letter bearing date 26 January 1943 Karl Brandt wrote to Wolff at the Fuehrer’s (Hitler’s) headquarters asking if it were possible to carry out “nutritional experiments” in concentration camps. The nature of the desired experiments does not appear, nor does the evidence show whether or not such experiments were ever made. The letter, however, indicates Brandt’s knowledge of the fact that human subjects could be made available for experimentation. Defendant Rudolf Brandt, by letter dated 4 September 1944, wrote Baumert, evidently a member of Himmler’s staff, stating that Karl Brandt had telephoned and requested that Himmler direct that 10 prisoners from Oranienburg should be made available as of the next day for two days to test a certain drug. The letter stated that the prisoners would not be injured by the test. It appears from an official note filed by Kliewe of the Army Medical Inspectorate, dated 23 February 1944, referring to a conversation with the defendant Blome on that date, that experiments concerning biological warfare connected with plant parasites, etc., had been made; that up to that date no experiments had been conducted in the field of human medicine; but that such experiments were necessary and were in contemplation. The memorandum continues: