VOLATILE CHLORIDES WITH AMMONIA. 4] 
Its combination with ammonia is, according to, him, a mixture 
of a sulphamide SN H? (analogous to oxamide), and of chloride 
of ammonium. 
With regard to the first view, I have already, in a former 
paper, endeavoured to show that the combination S Cl? +5 § 03, 
prepared by me, cannot well be regarded as S + 23 O + CL*; 
and the reasons which I mentioned rendered it likewise pro- 
bable that Regnault’s chloro-sulphuric acid should be considered 
as a sulphate of chlorideof sulphur. In this memoir, however, ad- 
ditional reasons will be given in the sequel in support of my view. 
As to Regnault’s view respecting the nature of the ammonia- 
cal combination, he himself admits that he had found it im- 
possible to separate the chloride of ammonium from the sulpha- 
mide mixed with it ; for both bodies he supposes have nearly the 
same solubility in water and in alcohol, and could be but very 
imperfectly separated by crystallization. 
The sole reason which Regnault mentions in support of the 
view that the ammoniacal combination contains chloride of am- 
monium is, that the entire quantity of the chlorine can be thrown 
down from its solution as chloride of silver, by a solution of 
nitrate of silver. He further supposes that chloride of platinum 
only precipitates that portion of the ammonia from the solution 
which is contained in it as chloride of ammonium, and not the 
amide in the hypothetically adopted sulphamide. 
From all the combinations of volatile chlorides with ammonia 
which I have examined, the amount of chlorine may, after their 
solution in water, be determined by nitrate of silver in the usual 
manner, whether they contain more or less ammonia than is re- 
quisite to form chloride of ammonium with the quantity of chlo- 
rine. All these ammoniacal compounds, at least those I have 
examined, have further in this respect the property that their 
amount of ammonia can by no means be entirely precipitated, 
frequently only to about one half, by chloride of platinum, from 
their solutions, as chloride of ammonium-platinum. It seems as 
if only the oxide of ammonium, not the ammonia, could be com- 
pletely thrown down by chloride of platinum ; for the sulphat- 
ammon, as well as the parasulphat-ammon, in which decidedly 
ammonia only is contained, give, after their solution in water, 
it is true, precipitates with chloride of platinum ; but by far the 
* Poggendorfi’s Annalen, Bd. xlvi. p. 16. 
