ON THE NATURE OF INTESTINAL SECRETION, 65 
Experiment 31.—Sulphate of quinine. 2} ¢.¢. saturated solution of mag- 
nesium sulphate containing 5 grains of sulphate of quinine were injected into 
the middle loop. 
On examination, 
Middle loop contained 19 c. c. of turbid fluid and thick mucus. After 
filtration it was = 7 c.c. and opalescent. It gave a copious 
precipitate with HNO,. 
Upper ,, empty. 
Lower ,, contained a very little fluid. 
Mucous membrane :— 
Middle loop slightly injected, covered with gelatinous mucus. 
Upper _,, 1 
Lower ,, \ 
Experiment 32.—Tannin. 23 c.c. of a saturated solution of magnesium 
sulphate containing 5 grains of tannin were injected into the middle loop. 
On examination, 
Middle loop contained 7 c. c. thick fluid with a granular sediment; no 
mucus. After filtration = 6 c. ¢. 
Upper ,, contained a tapeworm and a little fluid. 
Lower ,, % 7-5 ¢.c., after filtration = 5°5 c. c. 
The fluid gave an abundant precipitate with HNO,. 
Mucous membrane :— 
Middle loop slightly injected, with extensive submucous extravasation, 
Upper _,, 
Lower ,, 
Experiment 33.—Sulphate of zinc. 24 ¢c.c. saturated solution of magnesium 
sulphate with 1 grain of zinc sulphate were injected into the middle loop. 
On examination, 
Middle loop contained 8 ¢. c. clear fluid, no mucus. It gave an abundant 
precipitate with HNO,. 
Upper 
” 
Lower ,, \ oN 
Mucous membrane :— 
Middle loop slightly injected. 
Upper _,, 
Lower 
Experiment 34.—Chloral hydrate. 24 ¢. ¢. of a saturated solution of 
magnesium sulphate were injected into the middle loop, and after closure of the 
abdominal wound 15 grains (1 gramme) of chloral in 2 ¢. c. of water were in- 
jected subcutaneously. The cat weighed 43 lbs. 
On examination, 
Middle loop contained 133 ¢.c. of clear fluid with lumps of gelatinous 
mucus. 
} pale. 
} pale. 
ao Upper 
ower ee } empty. 
Mucous membrane :— 
Middle loop pale, cedematous, covered with soft gelatinous mucus. 
i. ia =i id } both pale and swollen. 
Experiment 35.—Chloral hydrate. 23 c.c. saturated solution of magnesium 
sulphate were injected into the middle loop, and as soon as the abdominal 
1874, F 
