CHANGES IN THE GLAND CELLS. 



145 



that if all the nerves leading to the gland be cut, after some 

 hours a pretty copious watery secretion of saliva occurs and lasts 

 for some weeks, after which the cells undergo atrophic changes, 



Section of Orbital Gland of the Dog. (Heidenhain.) (A) After prolonged period of rest. 

 (B) After a period of activity. In (A) the secreting cells are clear, being swollen up with 

 mucigen, and the half-moon cells are very distinct and darkly stained. In (B) the accu- 

 mulated material has been discharged from the cells, and the alveoli are shrunken. 



and the gland becomes reduced in size. The explanation of the 

 appearance of this so-called "paralytic saliva" is not clearly 

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