These depositions by the witness Dr. Lutz conform in every respect with the general impression received from all the pertinent descriptions. At first, only the altitude experiments approved by Dr. Ruff regarding the problem of “rescue from high altitudes” were carried out. These experiments were not dangerous as proved by their successful outcome; the inmates volunteered for them. Gradually, however, Rascher misused more and more the presence of the chamber in order to conduct his arbitrary experiments on Himmler’s orders for entirely different problems, namely, to conduct his notorious “difficult experiments” which had numerous fatal results. These were Rascher’s more cruel, painful experiments; naturally, no more volunteers reported for these because word was passed quickly through the camp that the experiments which Rascher himself conducted were dangerous, while the mere presence and cooperation of Dr. Romberg gave assurance to the inmates that his experiments were conscientiously conducted and were not dangerous. Other witnesses also, not named by Dr. Ruff, have confirmed that the experimental subjects for the Ruff-Romberg high-altitude experiments were voluntary, namely, the witness Dr. Hielscher (_German Tr. pp. 6025-26, 6041, 6062_). Testimony on similar lines is given by the codefendant Sievers (_German Tr. pp. 5471, 5881_); and Dr. Hippke (_German Tr. p. 793_) “Prisoners who might volunteer”; (_German Tr. p. 795_) “these persons had to volunteer for the experiments.” Also the witness Karl Wolff, (_Ruff 21, Ruff Ex. 20_) “volunteer concentration camp inmates who were to be given compensatory privileges * * * the inmates, about 10 in number, appeared quite relaxed and, in their turn, willingly entered the low-pressure chamber which had been driven up * * * the inmates reported to Himmler, in my presence, that in this manner they could at least voluntarily * * * give a proof of their genuine good will * * * I never learned through Himmler, nor, as far as I remember, by any other means that later low-pressure chamber experiments * * * took place on a nonvoluntary basis * * * I only knew about voluntarily low-pressure chamber experiments and these were made, without doubt, on a voluntary basis.” Finally, the witness Herbert Wilschewske (_Ruff 11, Ruff Ex. 9_).