ON THE SECR.ETION OF SALIVA. 
129 
the injection, since the small arteries dilate and all the capillary areas become fuller. 
We have made no direct observations upon the effect of injecting dilute solutions of 
sodium chloride into the blood on the circulation through the sub-maxillary gland ; 
in our experiments the injection has been followed by increased vigour of heart beats; 
since at the same time the amount of blood in the body was increased, we conclude 
that, both during rest and during secretion, more blood flows through the gland 
than normal, and that the capillary blood pressure is increased. 
We find that injection of dilute salt solution in moderate quantity in¬ 
creases the rate of secretion of saliva ivith a given stimulus, the per¬ 
centage of salts in the saliva rising nearly normally; and. that injection 
of dilute salt solution in larger quantity increases further the rate of 
secretion with a given stimulus, hut in this saliva the percentage of salts 
rises much less than normally, and may even fall. 
s 
MIX CCLXXXrX.- B. 
