and some other animal Fluids . 
379 
When the electrization had been carried on in this way for 
one hour, the cups were removed, and their contents exa- 
mined. 
The fluid in the negatively electrified cup acted rapidly on 
turmeric, rendering it deep brown. On evaporation and sub- 
sequent exposure to a low red heat, it afforded a residuum 
weighing 5,5 grains, which had the properties of soda, in a 
state approaching to purity. 
The positive cup contained a little coagulated albumen, and 
an acid which was principally, if not entirely the muriatic, was 
held in solution by the water : it gave a very copious preci- 
pitate with nitrate of silver, which became speedily black on 
exposure to light. When saturated with carbonate of soda, 
and evaporated, it afforded a salt in small cubic crystals, from 
which the fumes of muriatic acid were developed by the action 
of the sulphuric. 
This experiment shews that, exclusive of soda in an uncom- 
bined state, fluid albumen contains some muriate of soda.* 
We learn, from the experiments of Mr. Hatchett, that mi- 
nute quantities of other saline bodies are likewise present.-f- 
In the foregoing experiments, I had generally employed 
from sixty to three hundred four inch double plates of copper 
and zinc, but in subsequent researches, made with a view of 
* May not a submuriate of soda exist in fluid albumen ? 
f After the destructive distillation of coagulated, dry, semi-transparent albumen, 
there remained “ a spongy coal of very difficult incineration ; as towards the end of 
“ the process, it appeared vitrified and glazed with a melted saline coat, which was, 
however, easily dissolved by water. The residuum was again exposed to a long 
“ continued red heat, and again treated with water, till, at length, a few scarcely 
f < visible particles remained, which as far as such a small quantity would permit to 
“ be ascertained, proved to be phosphate of lime. The portion dissolved by water 
