42 H. ROSE ON THE COMBINATIONS OF THE 
greater portion of the ammonia is not precipitated by it. Ifthe 
fluids filtered from the precipitate are evaporated, they give still, 
on the addition of hydrate of potash, a strong ammoniacal smell. 
Carbonat-ammon (anhydrous carbonate of ammonia) gives, it is 
true, a solution in water, from which the ammonia can be en- 
tirely precipitated by chloride of platinum *; but this is indeed 
a proof that the carbonat-ammon is converted, upon its solution 
in water, into carbonate of the oxide of ammonium. The aque- 
ous solution of carbonat-ammon likewise comports itself quite 
similar to the solutions of the carbonates of the oxide of am- 
monium ; the carbonic has not lost in the solution its property 
of being recognized by the reagents by which it can be de- 
tected in its other combinations, as is the case with the sulphuric 
acid in the sulphat and parasulphat-ammon, which are not con- 
verted by water into salts of oxide of ammonium. 
I have made numerous experiments to find whether chloride 
of ammonium mixed with a sulphamide, is contained in the com- 
pound of the sulphate of the chloride of sulphur with ammonia, 
prepared by me, or whether it be a peculiar combination. The 
results of all the experiments speak decidedly in favour of the 
latter view. I will lay little stress on the curious constitution 
which such a sulphamide must have; it, however, deserves 
mentioning. If we suppose, according to the theory of substi- 
tutions, the constitution of the sulphate of the chloride of sul- 
phur as according to the formula S + 2} O + Cl, or rather 
as §° O° Cl, the latter must take up 3 N H* to form the ammo- 
niacal compound. If chloride of ammonium mixed with a sul- 
phamide is contained in such a compound, then again the latter 
must be a mixture of a peculiar sulphamide with sulphat-ammon, 
for S? O* Cl’ + 3 NH= C1N H* + 8° O° N’H?®; but the lat- 
ter compound must be regarded as SN Hs ah SN H2, Theam- 
moniacal combination would, according to this, be a mixture of 
three compounds, namely, of chloride of ammonium, sulphat- 
ammon and sulphamide. 
I have dissolved a considerable quantity of the ammoniacal 
combination in water, and evaporated the solution under the air- 
pump over sulphuric acid. Crystalline crusts were formed on 
evaporation, but it was not possible to distinguish in them di- 
* Poggendorff’s dnnalen, Bd. Ixvi. p. 361. 
