During his direct examination on 13 December 1946 the witness Vieweg mentioned a series of various experiments which were performed at the Dachau concentration camp. Referring in particular to the high-altitude experiments there, which alone can be considered in the indictment against Dr. Ruff, he states firstly that high-altitude experiments with the low-pressure chamber were performed on 10 patients; “for these experiments frequently patients and also male nurses were used who during the experiments were seen in the corridor of the adjacent hospital ward.” By this Vieweg apparently wanted to point out that these “patients” and “also the nurses” were not volunteers. These 10 “official experimental subjects” had been well fed and supplied with smokes, but in addition to these 10 so-called “exhibition patients”, a large number of people had been selected from the camp who were again and again sent to the high-altitude experiment institute. That happened to a block leader who probably had pneumonia a few hours later and ended in the sick bay mortuary. The same happened in the malaria department of the witness Vieweg. One day a patient who had some differences with Zill, the leader of the camp, concerning protective custody, was sent to the experimental institute, and he (Vieweg) found him in the mortuary the next day. He (Vieweg) knows by hearsay that, “a great number of patients who took part in these experiments died, and ended up in the sick bay mortuary.” (_German Tr. p. 476._) Between the lines of this rather obscure and vague statement one may read that, according to Vieweg’s statement, these further experimental subjects, and especially those who had died during the experiments, did not belong to the 10 “official experimental subjects” and had not been volunteers. However, in the direct examination by the prosecution the witness Vieweg did not express himself explicitly about this alleged compulsion of the so-called experimental subjects.