AND SOME OF ITS DERIVATIVES. 411 
shewn in the following analyses; they were performed on specimens prepared at 
different times, 
8395 ... carbonic acid, and 
6:277 grains, dried a day at 212°, gave 
I 
2°60 ... Water. 







6:150 grains, dried in vacuo, gave 
_ 8-205 ... carbonic acid, and 
II.{ 2°750 ... water. 
| 5°751  ... dried in vacuo, gave, burnt with soda lime, 
14650 ... platinum salt of ammonia. 
| I 4-912 grains, dried in vacuo, gave, burnt with soda lime, 
| ~\( 12-580... platinum salt. 
1 Iv 4-925 grains, dried in vacuo, burnt with soda lime, gave* 
~ (12445... _ platinum salt. 
Calculation. 
I. Il. III. IV. ——- 
Carbon, . 36-47 36°38 aoe is 36:23 Camo ud: 
Hydrogen, . 4:60 4:96 aa mf: 4:52 Hi, 63 
Oxygen, Un ae nL Ve 43°01 OE G00 
Nitrogen, . ... 1699 16:08 1586 1624 Ny, 294 
- 100-00 100-00 100-00 100-00 100-00 1391 












The formula expressive of the constitution of this substance as an ammonia 
salt of the above acid, is, 
9 NH,0, C,, Hy, N, O45 +3 aq. 
And the acid itself, considered with regard to its amount of basic water as indi- 
cated in the salt, is represented thus, 
9 HO, C,, Hy, N, O45 +6 aq. 
I attempted to determine directly the amount of nitrogen existing in the yellow 
salt as ammonia, but, upon reflection, I despaired of success, because the only 
method at my disposal being to decompose by hydrochloric acid, and evaporate 
the solution filtered from the precipitated amidic acid with bichloride of platinum, 
I saw that if this acid behaved as amidogen acids are known to do in concentrated 
acid fluids, namely to regenerate the parent acid and ammonia, I should inevitably 
obtain an excess. Nevertheless I made the experiment, and the lowest result I 
_ obtained was 10-4 per cent. nitrogen: now, 9:08 corresponds to 9 atoms of nitro- 
gen. I also attempted to form other salts by precipitation of solutions by that of 
- the ammonia salt, but the results were unsatisfactory and inconstant. The silver 
salt, a yellow gelatinous precipitate, dried up to a black mass; and the baryta 
- compound, a yellow amorphous precipitate, insoluble in boiling water, gave vary- 
_ ing numbers on analysis. 
* Lam indebted for this analysis to my friend Mr Rowney. He performed it on the substance 
mixed with sugar, 
