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- Now the oxide of zinc from the sulphate being redissolved 
by potash, there must be formed the similar compound 
K.0.S03 -+- Z20,KO. 
This cannot be obtained crystallized, for if the liquor be 
evaporated there is deposited Ko.so;, and zvo.ko remains dis- 
solved; from this, by exposure to the air, there are gradually 
deposited small crystals, which Dr. Kane considers as being 
K0.CO. + Zn 0.CO2 + 2 HO. 
but by heat there is carbonic acid given off, and a powder 
insoluble in water is produced, the composition of which, 
from Dr. Kane’s examination, appears to be 
KO.C03 + ZN0.CO> + 2 zno. 
It will be recollected, that the bicarbonate of potash is 
K0.C02 + HO.C02. 
By treating the ammonia sulphate No. 3 or 5 by water, 
there is obtained a basic sulphate, having the formula 
2n0.805 +6 zno+ 12 Ho. 
which, dried and exposed to the air, slakes, and gives 
Zn0.S0; +6 zno + 3 Ho. 
This new salt has some remarkable relations to those already 
known. 
There are two ammonia chlorides of zinc. 
No. 1, in pearly scales of a talcy lustre, consists of 
zn cl + 2 NH; + HO, 
and, when heated, gives off Nu3.HO. leaving NH3.Zn cl. a white 
powder. 
No. 2 is in fine quadrangular prisms, brilliant lustre, con- 
sisting of 2 zncl +2Nu3 + Ho. or, as Dr. Kane considers, 
zn.cl + (NHjHCl) + NH;.Zno. which losing NH;.HO leaves 
zncl + NH;.zncl. a white mass, fusible, congealing into a 
mass like gum, and volatilizable. This gummy mass is like- 
wise obtained by heating nu,zn cl. 
a § 
