Abstract
Interested by the influence of the salivary gland hormon (Parotin) on the animals in the embryonal stage, the author conducted experiments employing developing hens' eggs. In this experiment, the influence on the general development was first investigated, and then the histological examinations on the bone were conducted.
The injection doses employed for one egg were 0.2 mg, 0.1 mg, 0.01 γ and 0.001 γ in 0.1 cc of physiolgic saline. Untreated hens' eggs were also incubated as controls.
The eggs were divided into 3 groups, and the incubation was discontinued after 7 days, 14 days and 18 days respectively. On each occasion, the embryos were taken out and were weighed, and the growth of feathers were observed. Following the above, the embryos were fixed with 1: 10 solution of formalin.
Conclusions drawn are as follows:
1) The salivary gland hormon (Parotin) acts promotingly on the general development and the growth of feathers of the chick embryo.
2) Parotin has the ossification promoting action on the bone of chick embryo.
