SECRETION PHYSIOLOGY. 315 



Experiment X. 



Large dog. Operation as in other experiments. Secretion 

 in mm, 250 mm. = 0.82 cc., s=sympathetic ; c=chorda. 



Time. Nerve. Coil in cm. Secretion in mm. 



h. m. s. 



12 24 s 15 72 



12 25 .* s 15 12 



Chorda stimulated for several minutes, then .5 cc. of saturated solution of qui- 

 nine sulphate injected slowly into Wharton's duct. 



12 37 c 13 o 



12 38 c II o 



12 39 s II . 50 



12 40 ...... s II 27 



12 44 s 15 12 



12 45 s 15 9 



12 47 C II o 



12 48 c 7 o 



12 50 S 14 15 



12 54 C II O 



12 55 s 14 7 



12 57 s 13 10 



12 59 s 13 3 



Inject mixture equal parts 0.6% NaCl and sat. quinine sulphate. 



I 03 s 13 24 



I 05 s 13 4 



I 09 s 12 o 



I 10 s 9 I 



III s 10 o 



Neither nerve produces a secretion, though stimulated from time to time. 



4 00 c 8 o 



4 01 s 8 O 



Inject 0.5 % NaCl into duct. 



4 02 s 6.5 32 



4 03 s 6 14 



4 06 s 6 ..... . . 3 



4 09 Inject HCl 0.5% into duct. 



4 10 s 6 9 



Chorda ineffective at any strength. 



In the foregoing experiment the chorda became completely 

 ineffective at 12:30. The gland, however, was abnormally full 

 of quinine fluid, and the first sympathetic stimulation after the 



