In virgin mice of strain A, anterior hypophyseal transplants increased the incidence of mammary cancers; in castrate males bearing hypophyseal and ovarian grafts, the number of mammary can eers exceeded that noted after transplantation of ovaries alone. These findings were interpreted as owing to the release of gonadotrophins by the hy pophyseal transplants, which stimulate the output of estrog...

THIS investigation was undertaken in order to discover whether the Golgi elements of anterior pituitary cells possessed the duplex structure described by Baker (1944) for cells of certain vertebrates and invertebrates, after fixation in formal-calcium chloride and staining in sudan black. Pituitaries of normal mature male rats and comparable animals implanted with tablets of stilboestrol were u...