24 Dr. Prout on the Phenomena of Sanguification, (JAN. 
four years ago, at the request of Mr. Astley Cooper; and the 
chyles which | examined were, I believe, taken from the same 
two dogs, the contents of whose duodena have been described in 
a former part of this paper. 
Chyle of a Dog fed on Vegetable Food.—This is described by 
Dr. Marcet as appearing “ a short time after being collected in 
the form of a semitransparent, inodorous, colourless fluid, having 
but a very slight milky hue, like whey diluted with water. Within 
this fluid there was a coagulum, or globular mass, which was 
also semitransparent, and nearly colourless, having the appear- 
ance and consistence of a/bumen ovi, or of those gelatinized 
transparent clots of albuminous matter which are sometimes 
secreted by inflamed surfaces. This mass had a faint pink hue, 
and minute reddish filaments were observed on its surface.” To 
this description I have nothing to add, except that the specimen 
I examined did not sensibly affect litmus, or turmeric papers, in 
any state, nor coagulate milk. Dr. Marcet’s further observations 
also agree with my own. He found that the coagulum, when, 
separated from the serum, parted readily with its serosity, or 
fluid portion, and was at length reduced to a very small size. The 
sp. gr. of the serum he found to be in different instances 1-0215 
and 1-022. He appears to have considered the serum as well as 
the coagulum to have contained albumen. The portion of solid 
matter, including salts, varied in different specimens of the chyle 
from 4°8 to 7-8 per cent. The proportion of saline matter was 
very uniformly about 0°92 per cent. 
hyle of a Dog fed on Animal Food.—Dr. Marcet’s description 
of this species of chyle agrees also with my own observations. 
He describes it as resembling the last, except that “ instead of 
being nearly transparent and colourless, it was white and opaque 
like cream. The coagulum was also white and opaque, and had a 
more distinct pmk hue, with an appearance not unlike that of very 
minute blood-vessels. The coagulum, as in the former instance, 
gradually yielded further quantities of serous fluid till nothing 
remained but a small quantity of a pulpy opaque substance, in 
appearance somewhat similar to thick cream, and containing 
minute globules, besides the red particles above noticed. The 
residue of the coagulum became in the course of three days quite 
putrid, whilst that obtained from vegetable chyle in a similar 
manner had not yet begun to undergo that process.” The serous 
portion on standing assumed a creamy-like appearance on its 
surface. Its sp. gr. and other properties were similar to those 
from vegetable food. Itleft a quantity of solid matter, including 
salts, varying in different specimens from 7-0 to 9-5 per cent, 
The proportion of saline matter were the same as before. 
The following are the results of my examinations of these two 
varieties of chyle : 
