Dr. Smith on the Composition of Spermaceti. 309 
alcohol, which dissolved the soda salt and not the carbonate of 
soda ; from this the alcoholic solution was separated by filtration, 
and this last, evaporated to dryness, furnished the salt perfectly 
re. 
Silver Salt.—This salt was formed by a double decomposition 
of the salt just described and nitrate of silver. The soda was 
dissolved in water, and to this was added a solution of nitrate of 
silver, which produced a white flocculent precipitate, the salt in 
question. This precipitate was thrown on a filter and well wash- 
ed with warm distilled water, and dried at 212° in the dark. 
This silver salt, when burnt in a porcelain crucible, gave the 
following results. 
Exp. 1. 0.332 gram. silver salt ewe 0.098 gram. silver. 
we Ae Oraoe * Oi * . 
Oe” Bree = - Wag ATOS i 
_ Out of these the following per centage of silver and oxide of 
_ silver in the salt was calculated. 
Exp. 1. 29.56 silver, 31.75 oxide of silver. 
O° ox PO89 aH 31.67." : 
© 3.0 B69 Shite * 
From the same analyses the atomic weight of the anhydrous 
acid was calculated to be, from 
«3. 249.36. 
The silver salt was now analyzed with biel of copper; to 
ascertain the quantity of carbon and hydrogen that it contained. 
1. 0.4735 gram. silver salt burnt with the bioxide of copper, 
gave 0.910 gram. carbonic acid, and 0.3595 gram. water. 
2, 0.483 gram. silver salt burnt with the bioxide of mee 
gave 0.934 gram. carbonic acid and 0.3705 gram. water. 
om these analyses we find in 100 parts of the salt— 
Exp. 1. 250.00 | i 
‘, 2, 251.562 > Mean, ... ~ a er aati 
1. Mean. 
Carbon, 52.84 53.15 53.00 
Hydrogen, 8.42 8.52 8.47 
gen, 7.04 6.63 6.83 
Oxide of silver, 3170 31.70 31.70 
