ON BINOXALATE OF AMMONIA. 137 
We may hence represent its composition as follows : 
Formula, Calculated, Found. 
C 4 300. 29.94 30.0S 
5 500. 49.90 49.26 
H 2 24.95 2 49 3 33 
N 177.93 17.G7 17.33 
1001.98 100.00 100.00 
Oxamate of ammonia contains only the equivalent of wa- 
ter, indispensable to the constitution of the ammoniacal salts, 
while that of baryta contains three equivalents. This latter 
salt treated in the cold by the proportional quantity of sul- 
phuric acid freely diluted with water, yields, on the evapora- 
tion of the liquid at ordinary temperatures, free oxamic acid. 
The analysis of oxamate of ammonia and oxamate of silver, 
confirm the composition deduced from the salt of baryta ; 
as to the free acid, the following is the formula deduced from 
experiment, and calculated on the supposition that it contains 
one equivalent of water. 
Formula. 
C 4 300 
26.9 
26.1 
O 6 600 
53.8 
54.8 
H 3 37 
3.4 
3 9 
N 177 
15 9 
16.6 
1114 
100*0 
100.0 
Anhydrous, or such as it exists in the dry oxamates, this 
acid contains the elements of binoxalate of ammonia, less 
one equivalent of water ; it is to the binoxalate, what oxamide 
is to the neutral oxalate ; and is isomeric with thealloxane of 
MM. Leibig and Wohler. In the free state it contains an 
equivalent of water, and thus reunites the elements of anhy- 
drous binoxalate of ammonia. Like the amides, to which it 
