Abstract
The authors obtained the f ollowing results on the eccrine sweat glands in palm and sole of embryos of the fifth to the ninth month.1. Alkaline phosphatase demonstrated by Gomori's revised method. The activity of the primordium of the duct is somewhat weak, but the activity of the primordium of the fundus is so strong that nuclei are hardly recognizable. In the sixth month, in the glands, of which lumen are formed, the activity of the basal cells of the secretory portions is strong both in the palm and the sole. Especially the nuclei show very strong activity. With the progress of the foetal months, the seventh, eighth and ninth month, the activity of the primordium of the duct and fundus decrease, but the activity of the superficial cells is moderate. The activity of nuclear membrane and karyoplasm is strong during the fifth to ninth month. 2. In the fifth month hardly any glycogen in the sweat glands is observed in the outer layer of the primordium of the duct and in the basal cells of the primordium of the fundus of the sweat glands, of which lumen has been formed.
