Carbonic Acid and Ammonia. 21 
smell however still remains. This loss of 
weight and smell is effected in a few minutes 
if the temperature be upwards of 100°. 
Wishing to know whether the carbonate of 
ammonia as manufactured by different people, 
is of the same quality; I procured specimens 
from three different shops, under the idea 
that they might probably have been supplied 
by different people, or by the same people at 
different times, and consequently different 
samples. One hundred grains of each of 
these were pulverized and exposed on paper 
in a temperature of 45°. The first sample 
lost weight as under: 
100 Grains 
in 4 hours became 80 —— 
— 8§ ———— 57 — 
51; —- 
Rika aa RE a, 
— 2b 30 —— 
se) ieee ee 
‘The second sample in like manner gradually 
lost weight till it became stationary in the 
same time; but the total loss of weight 
‘was only 24 grains. Andin the third sample 
the loss was still less, being only 14 grains. 
The salts remaining were alike in appearance 
and almost destitute of smell. A certain 
portion of each was dissolved in a given 
quantity of water; they all gave the same 
