[Experiments on rhesus-monkeys (Macaca mulatta) with the carcinogens methyl- and ethylnitrosourea (author's transl)].

Application of methyl- and/or ethylnitrosourea during intrauterine or postnatal life did not induce tumours in Macaca mulatta. Most of the animals survived 5 to 10 years after the beginning of the experiments and are in good health at present. Complete postmortem examinations were performed in all monkeys who died.