222 
EXPERIMENTS ON DIGESTION. 
tion was an adult sheep. It was far more difficult to lay hare the 
pancreatic duct than in the dog, because the duodenum and the 
pancreas were in part covered by the large intestines. We opened 
the abdominal cavity by a transverse incision from below the right 
ribs to the linea alba, and then drew out the duodenum. We next 
sought for the ductus choledochus, and tied it below the point at 
which the cystic canal joins the hepatic one. That being done, the 
ductus choledochus was tied a second time at the point of its inser- 
tion into the duodenum, and divided above the ligature, in order 
to render, the introduction of a tube into its interior more easy. 
After that it had been freed from the bile which it contained, we in- 
troduced an elastic tube, and confined it with a ligature ; and as 
the pancreatic duct opened itsfelf into the ductus choledochus two 
inches above the insertion of the latter into the duodenum, the pan- 
creatic fluid necessarily ran through the tube. 
Every thing being thus disposed, we replaced the duodenum in 
the abdomen, and directed the tube outward, and passed a seton 
through the wound. It was not until the expiration of three hours 
and a half that the first drop of the pancreatic juice escaped from the 
tube, and then it continued to flow at the rate of a drop in every four 
or five seconds. At the commencement the fluid was white and 
clear as water. It feebly reddened turnsole, and consequently was 
acid, and it dropped from the fingers like the white of an egg. In 
the course of the five following hours we obtained rather more 
than five grammes of it. The animal died in the night. 
III. The pancreatic juice of a horse . — A horse being destroyed 
after it had heartily fed on oats, the abdomen was opened imme- 
diately, and the excretory canal of the pancreas discovered and tied. 
We obtained about one gramme of pancreatic juice. It was of a pale 
yellow colour, and nearly limpid, with a slight opaline tint. It was 
viscid, like the white of an egg. It feebly reddened the tincture 
of blue turnsole, but produced no effect on the red. 
IV. General conclusions . — The pancreatic juice contains, 
1. Of solid matter 8.72 in the dog, and from 4 to 5 per cent, in 
the sheep. 
2. These solid parts are, 
a. Osmazome. 
b. A matter which reddens by the addition of chlorine. This is 
found only in the dog, and not in the sheep. 
c. A matter analagous to deposition, and probably associated 
with the salivary fluid. 
d. A considerable quantity of albumen, constituting about half 
of the dry residue. The pancreatic juice of the horse was also 
rich with albumen. 
e. A very little free acid — probably acetic. Although in small 
