[On the histogenesis of osseous structures in epithelial tumours. A light and electronmicroscopical study illustrated at the so-called mixed tumour of the mammary gland in bitches (author's transl)].

The osseous areas of 126 canine mixed tumours of the mammary gland were studied by light microscopy. Seven cases were investigated in detail using the electronmicroscop. It is suggested, that these structures develop by enchondral ossification.

Physiological data including evaluation of immuno-response in relation to anabolic effects on veal calves.

In a series of experiments with a total of 1480 veal calves, different aspects of treating calves with anabolic steroids were examined. The anabolics used were 17beta-estradiol (E), trenbolone acetate (T), progesterone (P), testosterone (Te), C+T, E+P, E+Te and zeranole (Z). The N-retention was estimated by examining the urea: creatinine ratio in single urine specimens during the course of two feeding trials.