1819°] and on the Blood in general. 25 
Vegetable food. Animal food 
IW MEE es ciate tl sy Me oka te ee Se es 89-2 
Me the SP We ts bes Soe clea ue i eared 0-8 
Incipient albumen? ................ BAO Xs shuts: 4:7 
Albumen, with alittle redcolouringmatter 0-4 ...... 4-6 
Sugar of milk? ........ » < ee? Pets eae trate vil, .:. .\s _— 
Oily matter..... Lenp eleva’. cimakiaeets trace oii & trace 
abine matters: id. 6b ods Hoes wan ny OS, tetany one 
100-0 100-0 
Nearly the same modes of operating were adopted in the exa- 
minations of these specimens of chyle as in those of the chymes, 
formerly described : thus, 
The quantity of water was ascertained, as in the former in- 
stances, by evaporating a known weight of the perfect chyle to 
dryness on a water-bath. The coagulum of the chyle was 
repeatedly washed with cold water till it ceased to give off any 
thing to that fluid ; the remainder was a small portion of a sub- 
stance differing in very slight particulars only from the fibrin of 
the blood. One of the chief of these differences was its greater 
difficulty of solubility in dilute acetic acid. It was, therefore, 
considered as fibrin. 
To the serous portion was added dilute acetic acid, and heat 
applied till the mixture boiled. A copious precipitation took 
place, which, therefore, was not albumen. It differed also from 
the caseous principle of milk, since it was readily and completely 
precipitated by the oxymuriate of mercury. It was named inc2- 
pient albumen, and its nature will be more fully considered 
hereafter. 
After the above principle had been removed by filtration, prus- 
siate of potash was added to the acetic solution. A copious 
precipitate fell, which was considered as albumen. 
In the serum of the vegetable chyle there appeared a trace of 
what was considered as sugar of milk. This was not observed 
in the serum of the animal chyle. 
In both chyles, but especially in that from animal food, there 
was a distinct trace of an oily substance. 
The saline matters consisted chiefly of the alkaline muriates, 
with traces of a sulphate, and, perhaps, of a lactate; but of this 
last I am not certain. 
The chyles of birds, fishes, and the inferior animals, have not, 
as far as | know, been examined. Their properties, therefore, 
at present, are entirely unknown, which is much to be regretted. 
(Zo he continued. ) 
