50 
Mr. Home on the 
into the circulation of the blood. I was much disappointed on 
seeing the colour of the decoction, which, instead of being a 
bright red ( the tinge communicated to the bones ) , was of a 
dirty brown. The same gentlemen assisted me, as in the 
former experiment. 
Nov. 8, 1807, seven ounces of a strong decoction of madder 
were injected into the stomach of a dog, immediately after the 
pylorus had been secured. At this time the dog voided some 
urine, which was limpid and colourless. In 42 minutes, 2 
ounces of a yellowish fluid were brought up by vomiting. In 
18 minutes more the dog vomited again ; what came up 
proved to consist of ounces of solid matter, and 3 ounces 
of liquid. I11 15 minutes afterwards, 5 ounces of the decoction 
were injected, which remained quietly on the stomach for two 
hours and a quarter, at the end of which period the dog 
was killed. In the act of dying he made water, in the 
quantity of two ounces, of a dark muddy colour. This was 
saved, and afterwards compared with the remaining liquid in 
the stomach, which it exactly resembled. On examining the 
connections between the stomach and spleen, none of the ab- 
sorbent vessels were apparent, more than in the former ex- 
periment. The pyloric portion of the stomach contained about 
two ounces of half digested food, but no liquid. The cardiac 
portion contained four ounces of liquid, and half an ounce of 
solid food, so that the act of vomiting, which appeared, at the 
time, a sufficient exertion to have completely emptied the sto- 
mach, had brought up no part of the contents of the pyloric 
portion, and had not even completely emptied the cardiac 
portion. In this experiment, without making allowance for any 
liquid in the stomach, prior to the decoction of madder being 
injected, one-fourth part of the quantity thrown in had escaped. 
