128 ON THE METALLURGY OF NICKEL AND COBALT. 
Trials were made with the view of taking advantage = the 
comparatively easy decomposition of magnesium chloride by 
aqueous vapour at a high temperature. The nickel and cage 
sium were obtained together i im ee Saas Aba oie ted to dryness 
and sie i with steam at vario s temperatures ranging from 
212°F. to dull redness, but ash nickel chloride was invariably 
sadolibones along with the magnesium chlori 
A portion of the ore in pea-sized pieces was alii treated at a 
dull red heat in a combustion tube with dry hydrochloric acid gas, 
with the vie 
each piece seemed converted into a golden ball. The chloride 
was readily eas: out by hot water, but numerous trials gave 
an average of 3°62 per cent. of nickel extracted from an ore 
containing 10° “66 per cent. The solution contained both ferrous 
d magnesium chlorides in small repartee Its composition, 
calculating the metals as dry chlorides, was 
Ferric chloride, traces. 
Ferrous OG: xs - 5°42 
Magnesium dia, w. 12°45 
Nickel a wea: SSRIS 
100-00 
_ From finely-ground ore similarly treated for five hours 6°73 
per cent. of nickel was-extracted, whilst no — was observed 
on continuing the treatment for two hours lon 
seemed therefore as if part of the metal w was in more inti- 
mate combination with the silica Se that ted; so with a 
iffer 
On further treatment with hydrochloric ae gas 1°65 per gpa 
Teaving 39 3°93 per cent. there w 
little apparent differ rence between the r sectacine agents, sithouslk 
on the whole the carbon Se the best. The solutions obtained 
r reduction were much more impure than those got in the _ 
ion nickel. Calculated as 
dee 
oh eae 
instance, showing more iron t 
ntained :— 
before, they co 
Ferrous chloride ... sd; 8S 
Magnesium do. ...... .... 1680 
= - Nickel O60: sc xe BEB 
ee 100-00 
