ON THE SECRETION OP SALIVA. 
145 
before and another after bleeding, clamping the carotid, or other treatment which 
may modify the character of the saliva subsequently secreted. We take only those 
cases in which the two or more samples of saliva are obtained in succession by 
pilocarpin. The number of the sample of saliva will show whether it was secreted at 
the beginning of an experiment or not. 
There are eight cases in which the saliva obtained by pilocarpin can be compared; 
in six of these the percentage of salts follows Heidenhain’s law. In consequence of the 
effect of pilocarpin upon the heart and upon the small arteries, we should not expect 
to find that the statement we have made above with regard to chorda saliva—viz., 
that, with equal increments in the rate of secretion, the increments in the percentage 
of salts become less—should necessarily hold with regard to pilocarpin saliva. But 
five of the six cases which follow Heidenhain’s law show more or less distinctly that 
the statement is also true, under certain conditions, with saliva obtained by pilocarpin. 
Table XIII. 
Increase in 
Rate of 
percentage of .salts 
secretion 
Percentage 
corresponding to 
per minute 
of .salts. 
an increase of 
in c.c. 
•01 c.c. a minute 
in rate. 
Ex. 10. TI. 
I. 
•085 
•292 
•2811 
•590/ 
•0149 
Ex. 7. XII. 
•116 
•424'! 
•02 'I 
X. 
•125 
•4421 
XI. 
•192 
•476/ 
•0051 J 
Ex. 4. V. 
•182 
•2381 
•0062 
IV. 
•376 
•358/ 
Ex. 12. I. 
•156 
•2131 
•0037 ) 
III. 
•500 
•3411 
II. 
1-500 
•600/ 
•0026 / 
Ex. 8. II. 
•250 
•4201 
•0033 1 
I. 
•675 
•559 I 
III. 
1-650 
•752 / 
-0019 J 
Ex. 9. 11. 
I. 
•855 
•750 
.4011 
-403/ 
•0003 
V. 
IV. 
•490 
•700 
•5151 
•525 / 
•0005 
Weight of 
Dog- 
in kilos. 
' { 
f 
1 
- { 
15 
^ { 
15 
- { 
Eemarks. 
3 mgrm. pilocarpin injected be¬ 
fore I. 
4 mgrm. pilocarpin injected be¬ 
fore X., 8 mgrm. before XL, 
15 mgrm. before XII. 
7'5 mgrm. pilocarpin injected be¬ 
fore V. 
3 mgrm. pilocarpin injected be¬ 
fore I., and 3 mgrm. before II. 
3 mgrm. pilocai’pin injected be¬ 
fore I., and 3 mgrm. before III. 
The percentage of salts in 11. 
may have been slightly dimi¬ 
nished by the injection of NaCl 
•2 p. c. (c/. p. 22). 
5 mrgm. piloca.rpin injected he- 
fore I. 
5 mrgm. pilocarpin injected be¬ 
fore IV. 
TT 
MDCCCLXXXTX.—B. 
