To mature female mice of the "H" strain aurothioglucose was applied, once in the dose of 1 mg g-1 of live weight i. p. In the case of feeding ad libitum we determined, after three months of the experiment, the nitrogen total in the fatfree dry substance. On an average the values of the total N in the animals were, after the injection of aurothioglucose, equal to those of the control animals, and the values of the nitrogen total with regard to the fatfree dry substance were practically the same.