184 
latter being deposited on the sides of the glass, from the 
liquid nitrate of ammonia, gives a mirror surface equal to that 
obtained by aldehyd. 
On analyzing the ammoniacal compounds of nickel, Dr. 
Kane found the results of Erdman completely verified; but 
from the inferior affinity with which the ammonia was 
retained, these compounds did not yield as positive results 
as to their influence on theory, as those of the copper class. 
A new substance, discovered in the course of these re- 
searches, may be termed a fulminating copper. It is ablue 
powder, decomposed by heat into metallic copper, water, 
ammonia, and nitrogen. Its formula is 3cwo +2NH3+ 6 Ho. 
The examination of the zinc compounds has lead to the 
discovery of a considerable number of new bodies. The 
ammoniacal sulphate of zine crystallized is 
1 — zno.s03 + 2NH3 +5 HO 
exposed to the air, it efflorescences losing Ho, and becomes 
2 — 2n0.S03 + 2 (NH3.HO). 
which, if heated, gives at 212°F. 
3 — ZNO.S03 + (NH3-HO.) 
but at dull redness loses still Nu3.Ho and leaves zn0.so3. 
If No. | be exposed longer to a moderate heat it loses 
2 uo. and there remains, 
4.— zno so; +2NH; + HO 
if this be heated to 300°, it loses (Nu; Ho) and there is 
5 — Zn0.S03 + NH3. 
which further gives by heat 
6 — 2(zno.so3) + NH; 
from which the ammonia cannot be expelled without decom- 
position- 
Selecting from among these No. 2, for reduction to its 
rational formula, it becomes 
(NH3.HO.) S03 ++ 220. (NH3-HO). 
