It further appears in this Rascher letter of 15 May 1941 that Rascher had conferred with another Luftwaffe physician and that a tentative agreement had been reached wherein it was determined that the experiments on the concentration camp inmates, in which the experimental subjects were expected to die, would be performed at the “Bodenstaendige Pruefstelle fuer Hoehenforschung der Luftwaffe” at Munich:
“The experiments are being performed at the Ground Station for High-Altitude Experiments of the Luftwaffe [Bodenstaendige Pruefstelle fuer Hoehenforschung der Luftwaffe] at Munich. The experiments, in which the experimental subject of course may die, would take place with my collaboration. They are absolutely essential for the research on high-altitude flying and cannot, as it had been tried until now, be carried out on monkeys, because monkeys offer entirely different test conditions. I had an absolutely confidential talk with the representative of the Luftwaffe physician who is conducting these experiments. He also is of the opinion that the problems in question can only be solved by experiments on human beings.” (1602-PS, Pros. Ex. 44.)
Weltz testified that a meeting took place in the summer of 1941 on the occasion of a visit by Generaloberstabsarzt Hippke to Luftgau VII. (Tr. p. 7056.) In a discussion between Weltz, Kottenhoff, and Hippke, Hippke gave his approval in principle to the experiments if they were deemed necessary. (Tr. p. 7065.) In the course of the summer of 1941, Rascher went to Weltz and proposed the slow-ascent experiments, but Weltz turned them down as unnecessary. (Tr. p. 7176.) This testimony of the defendant Weltz clearly indicates the jurisdiction Weltz had over Rascher’s activities. This refusal to permit the performance of slow-ascent experiments bears out the contention of the prosecution that the defendant Weltz had the power and the authority to intervene at any time. Weltz’ actions throughout the entire development of the plans for the experiments were not merely negative. He was in full accord with the entire enterprise and he realized that Rascher did not possess the necessary qualifications to conduct these experiments without the assistance of a specialist in this particular field of aviation medicine. Furthermore, although Rascher was attached to Weltz’ Institute he had no other definite work. (Tr. pp. 7078 and 7187.) To find a specialist to collaborate with Weltz and Rascher proved to be a difficult task. Weltz first approached members of his own institute, namely Lutz and Wendt, men of considerable reputation in this field, but to no avail. Wolfgang Lutz appeared before this Tribunal and testified that Weltz requested his assistance, as well as the assistance of Wendt, but that they both refused on moral grounds. (Tr. p. 269.) Weltz did not deny this, but contended that his questions to Lutz were purely rhetorical. (Tr. p. 7069.)
The inability to interest a specialist in the field of high-altitude research to collaborate with Rascher explains the cause for the lapse of time between the date of the authorization by Himmler and the actual date of the commencement of the experiments, viz, July 1941 to February 1942. Weltz was not a specialist in high-altitude research. Kottenhoff was transferred to Romania, and Rascher was comparatively a novice in this field.
The next step taken by Weltz, which led to the completion of the plans to conduct the high-altitude experiments on human beings at the Dachau concentration camp, was his invitation to the defendants Ruff and Romberg to collaborate with Rascher. These two men were experts in this field and were interested in further research in altitudes exceeding 12,000 meters. Weltz testified that he made a trip to Berlin and that Ruff accepted his invitation to collaborate with Rascher. (Tr. p. 7188.) The evidence shows that Weltz approached Ruff and Romberg as he needed expert assistance. (NO-437, Pros. Ex. 42; NO-263, Pros. Ex. 47; NO-191, Pros. Ex. 43.) The defendant Ruff stated that he first heard of the plan to carry out research on inmates of the Dachau concentration camp from the defendant Weltz and that Weltz desired collaboration between Romberg and Rascher and between Weltz’ Institute and Ruff’s Institute. (Tr. p. 6653.) Furthermore, Ruff testified that Weltz stated:
“It is, of course, best if you or Romberg take part in these experiments because Romberg had already carried out such parachute descent experiments and is therefore the man who knows about the whole problem of rescue from high altitudes.” (Tr. pp. 6654-5.) Ruff further testified that Weltz suggested that a new series of experiments in parachute descents from great heights should be carried out at Dachau on prisoners. (Tr. p. 6653.)
From this moment on, the experimental program started to move as a mutual undertaking. This is better stated by the defendant Weltz:
“This was to be a mutual undertaking, during which Ruff was to detail Romberg and I was to detail Rascher. Ruff naturally was to be chief of Romberg and I, as a matter of course, was to be Rascher’s chief. Ruff couldn’t give any orders to Rascher. Rascher was a captain in the Medical Corps and Ruff was a civilian. I couldn’t give any orders to Romberg because Romberg was a civilian while I was a soldier. Naturally, this is how the distribution was. It had to be that way. Furthermore, it was clear that I couldn’t in any way retire. I could not just leave Rascher to Ruff. It was quite clear that I had to participate in these experiments by exercising supervision, but not by actively participating.” (Tr. p. 7079.)
This evidence certainly rebuts Weltz’ vague contention that he was not in search of specialists in high-altitude research to collaborate with him and Rascher. Without the efforts of Weltz the experiments could never have taken place. In brief, to conduct these experiments at altitudes exceeding 12,000 meters Weltz found it necessary to secure the assistance of experts in the field, as well as a low-pressure chamber which would meet his needs. Ruff and Romberg possessed both, and in the above manner Weltz skillfully engineered the whole plan.