


244. MR HENRY HOW ON CERTAIN SALTS AND | 
Experiment. Calculation. | 
——__—_——_——— 
Carbon, . ; 30°20 29:92 Cr 72 
Hydrogen, s 2-68 2°82 i . 
Oxygen, . : ce 30°62 (Gate 9 wir 
Nitrogen, ’ a 581 N 14 
Baryta, . : 32-02 31-83 BaO 76°64 
100-00 100-00 240°64 
The formula deduced from the analysis of this substance, supposing it to be the 
neutral salt of a monobasic acid will be 
BaO, NH, C,, H, 0,+2 HO. 
Comenamate of baryta, precipitated in an alkaline solution of the ammonia 
salt by chloride of barium, falls as a heavy white powder, insoluble in boiling 
water. Its analysis is subjoined :— 



6-023 grains dried at 212° gave 
5-065 ... carbonic acid, and 
0:989 ... water. 
5:247 grains dried at 212° gave 
4:020 ... sulphate of baryta. 
Experiment. Calculation. 
Carbon, . ; 22-93 23°35 Cr 72 
Hydrogen : 1-80 1:62 r 
Oxygen, . 2 rn 20:77 0, cay ae 
Nitrogen, . : nat 4:54 N 14 
Baryta,  . : 50:29 49-72 2BaO 153:28 
100-00 100-00 308-28 
From this analysis it follows, that, to assimilate this salt to the last, it must 
be considered as a basic compound, in which one of the equivalents of water re- 
tained at 212°, is replaced by an atom of baryta, according to the formula 
BaO, NH, C,, H, 0, +BaO HO. 
As precipitated from water, it contains an additional equivalent of water :— 
{ 11-720 grains air-dry lost at 212° 
0-362 .., water. 
the per-centage calculation from the experiment is 3°08; and the number 2°83 
corresponds to the formula 
BaO, NH, C,, H, 0,, BaO HO +aq. 
The salts of lime are very similar in appearance to the above, and with every 
base this acid seems to form two salts, which is a curious fact, since, reasoning 
from analogy, a substance originating as it does, should be monobasic in its 
nature. I am not at present able to afford any further information on the subject 
of its constitution and products of decomposition; but I may mention that I have 
observed, in its behaviour under certain circumstances, phenomena which I believe 
may prove of sufficient interest to encourage investigation. I append a list of the 
salts, &c., mentioned in this paper. 

