118 Scientific Intelligence. 
14. Chemical Analysis of a Calculus from the bladder of a Whale ; 
ote hegre Keiter, M. D., (Proc . Acad. Nat. Sci. Settee tee 
85.)—Whalers report that it is not unusual to Bn a number of cal- 
he in the bladder of the whale. These calculi are about the size of 
a hen’s egg, on the surface very smooth, and of a white color. 
breaking them they are seen to be for med of concentric layers, from 
the thickness of a sheet of paper to that of a quarter of an inch; the 
chemical composition throughout being very nearly the same. Mr. 
ul Muller and myself t ook for analysis different layers, and found 
them of the same composition. The chief constituent of the caleu- 
lus is the double phosphate of ammonia and magnesia. ‘The quantity 
magnesia found, will answer to the quantity of ammonia and water 
found necessary ‘for the formation of the double phosphate. 
um was silicic acid. The quantity of magnesia was ascertained as am- 
moniaco-magnesian phosphate, the phosphoric acid as phosphate of iron. 
The carbonic acid, the quantity of which was very small, was found 
by the apparatus of Will and Fresenius. The rest of the component 
parts were in such small quantities that they could not be weighed ; 
they were iron, lime, chlorine and soda. The ammonia and water 
were ascertained by calculation. 
Found. Caleulated. 
P.O, 27-21 AA 27-21 
MgO 15°75 MgG 15°75 
Fat 0°39 NH, 
0 2°66 HO 44:59 
SiO, 2°18 Fat 0:89 
HO 32°17 Li 2°66 
CO, 0-05 SiO, 2:18 
—- co, 0:05 
80:41 -_—— 
Traces of NaO, CaO, FeO, Ci. 98°91 
the presence of Fluorine in the Waters - o - Firth of rh jot 
the Birth “i tes” and the German James by G. Witson, M.D., 
obtained the mo ther-liquor or bittern st, the pans of a salt work ‘there, 
and soyey es it by nitrate of bar The precipitate after being 
washed and dried was warmed with vr of vitriol in a lead basin, cover- 
