W. EF. Gard—Analyses of Cast Nickel. 275 
cupric chloride on nickel is extremely slow, two or three weeks 
being required for the solution of five grams, although crushed 
fine in a steel mortar. The cupric ammonium chloride is a 
than nickel, while the reverse happens with sulphur. 
Fzperiments. 
It is well known that when oxide of iron is reduced by car- 
bon at a high temperature in presence of silica, a portion of 
the latter is simultaneously reduced and combined with the 
iron. To ascertain the deportment of silicon to nickel under 
similar conditions, the following experiment was made. 
quantity of pure nickel oxide was intimately mixed with about 
alf its weight of finely pulverized quartz, and enough charcoal 
powder to effect reduction of both. The mass was made into 
Oarbon . 2 2. 86 9°50 
Sinton... ae. 6°039 6190 
packed in layers with charcoal in a Hessian crucible and 
exposed to a full red heat twelve hours. Examination of the 
contents of the crucible showed that no fusion had taken place. 
The temperature was then raised until complete fusion ensued. 
The resulting metal was strongly magnetic, quite soft and toa 
considerable extent malleable. It possessed a specific gravity 
of 8-04, and a fracture resembling that of fine-grained grey pig- 
