and some of its Products of Decomposition. 59 
Repeated combustions did not enable us to lessen the per-cent- 
age of hydrogen. ‘The variation from the theory is, doubtless, 
to be attributed to the absorption in the chlorid of calcium tube, 
of asmall quantity of sulphurous acid, which escaped from the 
combustion tube. This explanation unfortunately occurred after 
repeated analyses had consumed the stock of salt. 
This constitution is remarkable in the field of organic chem- 
istry. On its borders we have a similar instance in anhydrous 
sulphate of ammonia, NH, +590,. 
Sulphate of Hydrate of Glycocoll. 
| 1,80,, HO. 
This salt was obtained from a solution similarly prepared to 
that which yielded the anhydrous salt, except that the solution 
was boiled with sulphuric acid, instead of the latter being added 
to the cold solution. It erystallizes m short prisms, reminding 
one of sulphate of copper, and the erystals, though small, are of ex- 
ceeding beauty and perfection of form. ‘They do not change 
upon exposure to the air. 
A single determination only was made, and that of the mitro- 
gen. The other determinations were not made, from want of 
substance, all subsequent efforts to form the salt having failed. 
By Varrentrapp and Will’s method :— _ 
03367 grm. gave 0°2943 grm. platin-salammoniac. 
In per cent. expressed, Nitrogen 12°37. 
- This corresponds with the formula 
: j 4 Pee peer 2 3) HO, 
Which requires 12°17 per cent. of nitrogen. 
Basic Sulphate of Glycocoll. 
(a.) 3G1 HO, 280,, 2HO. 
_If to a solution of glyeocoll in diluted spirits of wine, sulphu- 
tic acid in excess be added, and set aside, in twenty-four hours 
long rectangular prismatic erystals form upon the bottom of the 
containing vessel. A very considerable excess of sulphuric acid 
did not change the constitution of the crystals. 
They taste and react acid, and like the salts already described 
suffer nothing from exposure to the air. iu 
Combustion with chromate of lead gave the following results : 
- 0-4199 : ():3528 carbonic acid and 0:2149 water. 
IL. 03944 ate ate 03219 ce “ “« 91974 “ 
II. 0:2399 «  « py Varrentrapp and Will’s method, 0:5067 
grm. platin-salammoniac. 
IV. 06866 grm. gave 0°4928 sulphate of baryta. 
ve 0-5808 « “« 04170 “ 
VI. 0-4532 « & (3225 “ " 
Vil. 0-4960 « ee Gggoo!*" =“ “3 
