REPORT OF MEDICAL SECTION. 153 
3rd. Those constituents of animal matter which are soluble in 
water and alcohol. 
The extractive procured from blood, as soluble in water and 
alcohol, is that to which the name of osmazome has been given 
by chemists; it is called extrait de viande by the French, as 
procured from the blood it is precipitable of a brown colour by 
infusion of galls; the precipitate thrown down by subacetate 
(or di-acetate) of lead is soluble in an excess of that reagent. 
These reactions are sufficient to guide us in making our compa- 
rative experiments. 
4th. Lastly, we shall notice those constituents of animal 
matter which are insoluble in all the three menstrua employed in 
our analysis. 
This residuum, as procured fromthe serum of blood, consists 
of albumen, but is of different constitution in the various glands 
and solid parts of the body; thus the more firm portions of each 
gland are made up of the insoluble structure of blood vessels 
and absorbents, with more or less of the albuminous net work 
of the cellular tissue, making up the parenchyma. It will be 
necessary for us to set down these various parts under a single 
head, as we do not possess any means of separation; still, although 
we are thus prevented from ascertaining any deficiency or excess 
in any single one of these insoluble constituents of the gland, 
yet we shall very probably be able, by comparison of the three 
together with the similar combination in healthy specimens, to 
_ arrive at data which may be useful to us. 
Having now glanced at the probable contents of each extract- 
ive, I shall proceed to describe particularly each step in the 
prosecution of the analysis. 
Directions for the analysis of solid animal matters. 
A certain weight of the animal substance, sliced as minutely 
as convenient for manipulation, is to be carefully dried over a 
water-bath till it ceases to lose weight, the dry residuum being 
weighed ; the loss experienced is to be noticed in the analysis 
as “ water.” 
The dried animal matter is now to be digested, with three 
times its bulk of rectified ether, for four or five hours ina closed 
test tube, the mixture being shaken frequently. This ether being 
poured off, a second portion is to be added, and allowed to digest 
on the animal matter in a like manner. We thus procure an 
zthereal solution A, and a residuum B. 
A. The zthereal solution being allowed to evaporate todryness, 
the fatty matters deposited are to be dried over a water bath, Fats. 
and their weight ascertained. 
B. Water, at a temperature of 212°, and equalling six times the 
