138 
MESSRS. J. N. LMROLEY AND H. M. FLETCHER 
Here the injection into the blood of 10 grm. of sodium chloride, dissolved in 50 c.c. 
of water, increases in a marked but not immoderate degree the percentage of salt in 
the saliva. This is better seen by arranging the results in the following manner: — 
Table XI. 
Rate of secretion 
per minute in c.c. 
Percentage of 
salts. 
I. 
Saliva before injecting NaCl solution 
•292 
•590 
III. 
Saliva after injecting NaCl solution 
•208 
•685 
TI. 
Saliva before injecting NaCl solution 
•085 
•281 
IV. 
Saliva after injecting NaCl solution 
•038 
•352 
It will be noticed that the slow secretion (IV.) occurring after injection of the salt 
solution contains a comparatively high percentage of organic substance ; since there 
is reason to suppose that the strength of stimulus was less in this case than during the 
secretion of the saliva immediately before it, we take the increased percentage of 
organic substance to be due to a lessened secretion of water, brought about by the 
strong salt solution interfering with the blood flow through the gland. This, no 
doubt, also contributes towards increasing the percentage of salts in the saliva. 
