THE EXCREMENTS OF MAN AND ANIMALS. 
283 
Synoptic Table of the Immediate Principles of Human Evacuations in the 
Healthy State. 
Faeces 
boiled j 
with 
alcohol. 
Substance insoluble in 
alcohol, consisting of am- 
moniaco-magnesianphos- r 
phate, other inorganic 
salts, organic fibres, and 
other parts of food which 
have escaped absorption. 
Substance soluble in 
boiling alcoholic extract, 
but subsiding as soon as 
the fluid has become cold.<( 
When collected upon a 
filter and boiled in alco- 
hol, it yields 
A substance insolu- 
ble in boiling alcohol. 
A substance soluble 
in boiling alcohol, but 
precipitating on cool-^ 
ing, which, when 
washed with ether, 
yields 
A pure non-cry stallizable 
substance, soluble in hot 
alcohol, but precipitating 
in the solution when 
cold ; not yet sufficiently 
examined to rank as an 
immediate principle. 
A substance soluble in 
ether, and crystallizing 
by spontaneous evapora- 
. tion. 
A substance soluble 
in boiling alcohol, and 
not subsiding in the 
cold solution. Eva- < 
porated to dryness, 
and treated with cold 
ether, it yields 
An olive - coloured 
acid substance, soluble 
in ether and in hot alco- 
hol, but not precipi- 
tated in the cold solution. ^ 
Found by the addition of 
milk of lime, with the 
application of heat, to 
consist of two substances, 
viz. 
A yellow substance in- 
soluble in ether, andpartly 
soluble in water. 
A first substance pre- 
cipitated by the lime, 
which decomposed with 
sulphuric acid, yields to 
hot ether the pure imme- 
diate principle, Excre- 
toleic acid. 
A second substance, 
dissolved in the hot fil- 
trate from the above lime 
precipitate, being Excre - 
tine, or a body closely 
.allied to it. 
Substance soluble in 
hot alcoholic extract re- . 
maining dissolved in the < 
fluid when cold. This 
solution is treated with 
-milk of lime. 
Precipitate obtained 
by the addition of^ 
milk of lime to the 
alcoholic solution. 
The precipitate treated C Excretine. 
with ether, and the ethe- J 
real solution evaporated j A yellow oily matter, 
spontaneously, yields Lhitherto undescribed. 
Filtrate from lime 
precipitate concen-<( 
trated to a semifluid 
consistence. 
Precipitate, free from 
excretine, dissolved in 
alcohol or decomposed in^ 
water by hydrochloric 
acid, yields 
Treated with ether, 
often yields excretine. 
Concentrated filtrate, 
free from excretine, de- 
composed with sulphuric 
acid and distilled, doesnot 
yield any butyric acid. 
Margaric acid (not con- 
stantly present). 
Colouring matter of ex- 
crements. 
2 o 2 
