H. Wurtz on Cobalt and Nickel. 29 
lution contained tron, manganese, nigawe nickel, —_ bismuth, 
alumina, glucina, and traces of nad gm lead and magnesia. There 
were in this also traces of sulph ur, but no arseni oe 
he Asbury Shaft and Cross’ ‘Mountain minerals give deep 
beautiful grass-green solutions in chlorohydric acid, with evolu- 
tion i sonamgen which solutions become yellow- -brown on add- 
ing w, a behavior characteristic of solutions glk Np con- 
ieatle ahaitioek of cobalt with iron, and by which these 
cobaltiferous wads may generally be distinguished is sii 
earthy manganese containing but traces of cobalt or non 
As to the nature of the wnaltered mineral, from which these 
cobaltiferous gozzans have been derived by oxydation, it is pos- 
sible to form a very probable hypothesis. The absence of arsenze, 
not only from these, but from many other minerals that I have 
examined from this region,* leads to the conclusion that this 
unaltered mineral must be a sulphid, and not an arseniet of co- 
balt and nickel, and the great resemblance of these substances 
to the cobalt and nickel ore from Mine la Motte in Missouri, 
indeed appears to be a sparsely distributed a ol the schists 
of the “Carolinas Hardly any reliable analytical evidences of its occurrence in 
these latitudes are in existen We have, however, one oak evden: A mineral 
found in serve te quantities at t the bismuth ‘locality i in Chesterfield District, S. Caro- 
on analysis by <9 Genth proved ud bea eo ela of sulphid of copper, 
most probably identical with the Peruvian species enargite (Am. J. Science, ae 
xxiii, ath on. a also (p. 62) mentions Men specimen of Lesscopysise e found in Ran- 
Am. Jour. Science, [2], xxiii 
Tt mbered that these two sulphates occur naturally, as bieberite 
oxydation of their With 
pie to pie eative — of cobalt and nickel, when in neutral or acid solu- 
and Semper as ane and nicklic oxyds, our knowl- 
8 rimental evidence bearing u this ; is 
wanting. Thus Dr. Gi bs found (Am. I! Science, [2], xiv, 0 Be 
i i i its solutions, but Ni 
umerous analyses 
of wads, earthy cobalts and d boy manganese ores on record, the presence of Ni is sel- 
indicated, reason why, in alkaline so natty as in the presence 
of an excens sat ammonia. Me radars jum, the reverse action takes place, 
capacity Spake vile the Cb remains in ston “1 i simply th e eminent 
Ww cobaltic oxyd possesses to form solu louble conjugated 
_ Compounds, a tendency apparently not shared by nicklic oxyd. 
