268 



AMYLOLYTIC POWER AND CHEMICAL 



saliva obtained at such close intervals, under similar forms of 

 stimulation, differ from each other, four control experiments 

 were tried with water and rubber alone. 

 Following are the results obtained: 



A glance through these results shows at once certain marked 

 differences in the character of the saliva obtained under the 

 various conditions specified. Thus, saliva which flows from 

 the mouth after the latter has been rinsed once with water 

 invariably shows a lower degree of alkalinity, and generally 

 contains a smaller percentage of solid matter than the secretion 

 obtained by the other methods. In amylolytic power, however, 

 there is great variation, some samples showing a relatively 

 strong amylolytic action, while others with essentially the 

 same degree of alkalinity are much weaker in their starch- 



