A. No. It was more to get to know the subjects personally. The situation was this: in the discussion with the camp commandant on the basis of the agreement with Rascher and his authorization from Himmler, a very definite agreement had been reached to the effect that these people were to be selected from the volunteers. Therefore, a clear agreement had been reached on the conditions, about which there could be no doubts basically. When I met the subjects for the first time personally and talked to them about the principle of the experiments and their duties, and so forth, of course I also inquired why they had volunteered—not because of any distrust of the camp commandant, but just for that reason. Q. You thought, accordingly, that they were volunteers? A. I didn’t only think they were. They told me so themselves. Q. How do you know that so definitely for each case? A. In the course of time—not on the first day but in the course of time—I talked to all of them frequently in some detail, and gradually they told me about their previous convictions and what other prisons and penitentiaries they had been in before they came to the camp, and they also told me the reasons why they had volunteered. Q. Do you mean to say that all the experimental subjects used for the high-altitude experiments were volunteers? A. Yes. Q. Now before these subjects entered the chamber did you prepare them for what they had to do and tell them the significance of the whole thing? A. Yes, of course. First I explained the whole question to them in broad outline, so that they would know what it was about and what the purpose of the experiment was. In detail I told them specifically what they had to do in the experiments. There was the writing test during which they had to write numbers from 1,000 backwards; then the cardinal point was that after the altitude sickness during the experiments, as soon as they came to, they had to pull the rip cord. We had a handle in the chamber connected to a bell. This was to represent pulling the rip cord of the parachute. This had to be explained to them carefully, otherwise they wouldn’t have understood it and wouldn’t have reacted correctly. Q. Now, before the experiments began, did you have an electrocardiogram of each separate subject? A. Yes and again later on. Q. Please explain that. A. Rascher had first examined the people to see if they were suitable for the experiments, so there would be no heart defects or anything like that. Then in order to get an exact control, before the beginning of the experiments we took an electrocardiogram of all the subjects. In almost all the experiments the electrocardiograms were registered and at the end, when the experiments were finished, we took another electrocardiogram of all the subjects in order to have material because perhaps even if there was no visible injury, there might still be some effects which could only be determined by such tests.