“If the experimental subject were placed in the water under narcosis, one observed a certain arousing effect. The subject began to groan and made some defensive movements. In a few cases, a state of excitation developed. This was especially severe in the cooling of the head and neck. But never was a complete cessation of the narcosis observed. The defensive movements ceased after about 5 minutes. There followed a progressive rigor, which developed especially strongly in the arm musculature; the arms were strongly flexed and pressed to the body. The rigor increased with the continuation of the cooling, now and then interrupted by tonic-clonic twitching. With still more marked sinking of the body temperature, it suddenly ceased. These cases ended fatally, without any successful results from resuscitation efforts. * * * * * “Experiments without narcosis showed no essential differences in the course of cooling. Upon entry into the water, a severe cold shuddering appeared. The cooling of the neck and back of the head was felt as especially painful, but already after 5 to 10 minutes, a significant weakening of the pain sensation was observable. Rigor developed after this time in the same manner as under narcosis, likewise the tonic-clonic twitchings. At this point, speech became difficult because the rigor also affected the speech musculature. “Simultaneously with the rigor, a severe difficulty in breathing set in with or without narcosis. It was reported that, so to speak, an iron ring was placed about the chest. Objectively, already at the beginning of this breathing difficulty, a marked dilatation of the nostrils occurred. The expiration was prolonged and visibly difficult. This difficulty passed over into a rattling and snoring breathing. * * *” [Emphasis not shown.] During the winter of 1942 and 1943, experiments with “dry” cold were conducted. And Rascher reported on these in another letter to Himmler (_1616-PS_): “Up to now, I have cooled off about 30 people stripped in the open air during nine to fourteen hours at 27° to 29°. After a time, corresponding to a trip of 1 hour, I put these subjects in a hot bath. Up to now, every single patient was completely warmed up within 1 hour at most, although some of them had their hands and feet frozen white.”