20 Dr. Prout on the Phenomena of Sanguification, [Jan. 
little time, subsided to the bottom. Its taste was hitter, its 
smell faintish, and somewhat similar to bile. Sp. gr. 1-023. It 
exhibited very faint traces of an acid, and coagulated milk com- 
pletely, when assisted by a gentle heat. Nearly the same 
method was adopted in the analysis of this, as of the other spe- 
cimens before mentioned, and the results were as follow : 
is Wateriesn) watha by ohn was 2 « om attic me epbodumile) hale 9]-] 
B. Gastric principle, united with alimentary matters, 
and apparently constituting the chyme, mixed with ex- 
crementitious matter......... 5 aganade < oeree itcna tonel ene cae a 2-0 
C. Albuminous matter..... AE eye diy oS hrne Peery | es 
D. Bilary principle...) ............% cielo las, Since a iene 4-4 
RR st tea os Lenk vausun hoes Aen 1-4 
FP. Wepetable cluten,-or extract .. 2202.0). vee 
GisHalme mattere.ssi/.).. 5 «Ve fas Veie cad oo ated aso O8 
Ti oknaoluble residwuniib.s.. feed ts sce eee 0-3 
100-0 
The chymous matter was less in quantity, and the biliary 
_ principle much greater in this specimen than in any of the others. 
There was also a substance present (E) which [ have called 
Sa It was of a brown colour, and gummy consistence. 
aste, first bitter, and afterwards sweetish. Soluble in water, 
but perfectly insoluble in alcohol. It was obtained after the 
action of the alcohol by boiling the residuum in distilled water. 
It was not precipitated by the oxymuriate of mercury, but com- 
pletely so by the subacetate of lead. Hence it appeared to be 
a sort of altered mucus, or rather, perhaps, a combination of 
mucus with a little biliary principle, which the alcohol was inca- 
able of removing. Indeed so intimately does the biliary principle 
unite with all animal substances with which it comes in contact, 
that it can scarcely ever be again entirely separated. The inso- 
luble residuum (H) was chiefly vegetable fibres. 
Examination of the Contents of the Duodena of Rabbits.—The 
animals were the same as those in which the phenomena of 
digestion above described were observed ; and the experiments 
for ascertaining the properties of the contents of their duodena 
were similar to those made upon the duodenal contents of the 
dogs and ox; and need not, therefore, be repeated. The 
duodenum of the rabbit, fed on a mixture of bran and oats above- 
mentioned, at its commencement, contained chiefly a greenish 
yellow glairy fluid, full of air bubbles, with a small portion only 
of the insoluble parts of the food. This yielded decided evidence 
of the existence of a true chymous or albuminous principle. A 
little lower down in the duodenum a similar glairy fluid was 
observed, but it was more free from air bubbles, and seemed to 
contain a larger proportion of an albuminous principle. In short, 
the quantity of albuminous matter was found to increase to the 
