ON THE NATURE OF INTESTINAL SECRETION. 59 
On examination, 
Middle loop contained a small quantity of fluid, probably about 5 c. c.; 
but as the intestine was punctured in opening the abdomen and some 
of the fluid escaped, it could not be exactly measured, and was esti- 
mated approximately. Other loops empty. 
Experiment 7,—Saturated solution of potassium ferrocyanide. 22 ¢.c. were 
injected into the middle loop, The cat escaped, and twenty-two hours after 
was found dead. Weight of cat 3 Ibs. 
On examination, 
Middle loop contained 5:5 c. c. of a purulent-looking fluid, 
Upper _,, oY 3 ¢.c. of ‘ do. do. 
Lower ,, empty. 
Mucous membrane :— 
Middle loop. All the coats deeply congested. 
Upper _,, 
Lower ,, } pale. 
Experiment 8.—Saturated solution of potassium ferrocyanide, 22 ¢. c. 
injected into middle loop. 
On examination, 
Middle loop contained 13 ¢, c. 
Upper ',, be 10 ¢. ¢. 
Lower ,, empty. 
The fluid gave no colour with perchloride of iron. 
Mucous membrane :— 
Middle loop moist, pale. 
Upper ,, dry, pale. 
Lower ,, moist; contained a little moist fecal matter. 
Experiment 9.—Saturated solution of potassium iodide. 24 c.¢. injected 
into middle loop. After tying the ligatures round the intestine, it a 
to the thickness of a pencil. Weight of cat 6 lbs. 
On examination, © 
Middle loop empty; has a hole in it. 
pope ‘ } both contained about 3 ¢. c. of fluid. 
Mucous membrane :— 
Middle loop. Part of this loop seems to have been eroded by the potas- 
sium iodide, causing the formation of a hole in the intestine. 
The mucous membrane is congested and partly covered 
with bloody mucus. 
Upper ,, 
Towen \ pale; normal. 
Experiment 10.— Almost (but not quite) saturated solution of potassium 
iodide. 5 c.c. injected into the middle loop. 
On examination, 
Middle loop empty ; contained no liquid, 
Upper _,, 
Lower 
Serous coat of middle loop deeply congested and bright red all over, 
Upper loop 
Lower 
empty. 
} normal, 
