A. No. My first research started in 1939.
Q. You, yourself, have carried out experiments too; is that not so?
A. Yes.
Q. With human experimental subjects, of course?
A. Yes, and on myself.
Q. And with a low pressure chamber?
A. Yes.
Q. Were these frequent experiments, or were the experiments in which you, yourself, took part only infrequent in number?
A. The experiments in which I took part were infrequent in number compared to the total number of experiments which I performed.
Q. Did you take part in these experiments as the director of the experiments, as the person responsible, or were you usually the experimental subject yourself?