Medicinal sterilizations were therefore carried out. A Dr. Madaus had stated that caladium seguinum, a drug obtained from a North American plant, if taken orally or by injection, would bring about sterilization. In 1941 the defendant Pokorny called this to Himmler’s attention, and suggested that it should be developed and used against Russian prisoners of war. I quote one paragraph from Pokorny’s letter written at that time (_NO-035_): “If, on the basis of this research, it were possible to produce a drug which after a relatively short time, effects an imperceptible sterilization on human beings, then we would have a powerful new weapon at our disposal. The thought alone that the 3 million Bolsheviks, who are at present German prisoners, could be sterilized so that they could be used as laborers but be prevented from reproduction, opens the most far-reaching perspectives.” As a result of Pokorny’s suggestion, experiments were conducted on concentration camp inmates to test the effectiveness of the drug. At the same time efforts were made to grow the plant on a large scale in hothouses. At the Auschwitz concentration camp sterilization experiments were also conducted on a large scale by a Dr. Karl Clauberg, who had developed a method of sterilizing women, based on the injection of an irritating solution. Several thousand Jewesses and gypsies were sterilized at Auschwitz by this method. Conversely, surgical operations were performed on sexually abnormal inmates at Buchenwald in order to determine whether their virility could be increased by the transplantation of glands. Out of 14 subjects of these experiments, at least 2 died. The defendant Gebhardt also personally conducted sterilizations at Ravensbrueck by surgical operation. The defendant Viktor Brack, in March 1941, submitted to Himmler a report on the progress and state of X-ray sterilization experiments. Brack explained that it had been determined that sterilization with powerful X-rays could be accomplished and that castration would then result. The danger of this X-ray method lay in the fact that other parts of the body, if they were not protected with lead, were also seriously affected. In order to prevent the victims from realizing that they were being castrated, Brack made the following fantastic suggestion in his letter written in 1941 to Himmler, from which I quote (_NO-203_):