Chemistry. Ixxv 
of the sinovia of the ox examined many years ago by Margueron. 
—(Annals of Philosophy, xii. 120.) 
5. Eggs of the Pike.—A portion of these eggs was washed in 
a large quantity of water. The water was evaporated, and a 
white coagulable substance was procured, which was completely 
soluble in caustic potash, and precipitated by the infusion of 
nutgalls and nitric acid. This substance being calcined, the 
salts which it contained were obtained. The matter itself was 
considered as albumen, and the salts were potash, phosphate of 
potash, muriate of soda, and phosphate of lime.—(Vauquelin, 
Annals of Philosophy, xii. 148.) 
6. Urine of Amphibious Animals.—Dr. Prout ascertained 
some years ago that the urine (if that name can be given to @ 
solid excrementitious substance) of the boa constrictor consisted 
entirely of uric acid. Since that time, the urine of different 
species of serpents has been examined by Dr. John Davy. When 
thrown out, it has a butyraceous consistence, but becomes quite 
hard by exposure to the air. It was always found to be uric acid, 
in a state nearly pure. He found also the urine of lizzards to 
consist of nearly pure uric acid. That of the alligator, besides 
uric acid, contains a large portion of carbonate and phosphate of 
lime. The urine of turtles was a liquid containing flakes of uric 
acid; and holding in solution a little mucus and common salt ; 
but no sensible portion of urea.—( Annals of Philosophy, xiii. 209.) 
7. Calculi—We owe to M. Lassaigne the analysis of the fol- 
lowing calculi and animal concretions : | 
(1.) Calculus from the Urinary Bladder of a Dog.—It had a. 
brown colour, an irregular figure, and was of the size of a nut. It 
Here composed of urate of ammonia, mixed with a little phosphate 
of lime. 
(2.) Urinary Calculi of Oxen.—They were composed of car- 
bonates of lime and magnesia. 
(3.) Salivary Calculus of a Cow.—This calculus was white, 
very hard, capable of being polished, about the size of a pigeon’s 
egg, and its nucleus was an oat. It consisted of carbonate of 
ime, mixed with a little phosphate of lime, and some animal 
matter. 
(4.) Salivary Concretion from a Horse.—It was white, soft, 
elastic, and had exactly the form of the canal in which it was 
lodged. Cold water extracted from it alittle albumen with some 
carbonate and muriate of soda, Boiling alcohol extracted ‘a 
trace of fat. Solutions of caustic potash and soda dissolved it 
with facility. When calcined in a platinum crucible, it was 
decomposed, exhaling the odour of burning horn, and left a little 
white ash, composed of carbonate and muriate of soda, and 
phosphate of lime. These facts show us that if was composed 
of mucus, with some albumen, and the salts stated to have been 
extracted from it. af rg: ; 
(5.) Concretion from the Brain of a Horse.—It was white, 
