236 MINERALS FROM NEW CALEDONIA. 
Another ore gave :— 2% 
Analysis. 
Water lost at 100° C. a 9°46 
‘s sos tomy by difference ... we Tat 
Silica : 2: nl ee 
it soluble ies a 93 
Alumina and iron sesquioxide vas ee 1°31 
Nickel oxide a ise» 
Magnesia .. : me of ee 
— 
The —_—-~ analyses confirm the statement made in 1874 
that the is of uncertain composition ; it from 
stantielig iil pear hydrated silicate of magnesia to what is also 
practically only hydrated silicate of nickel. Some specimens which 
are now being examined quantitatively contain but a very small 
quantity of magnesia. 
Garnierite.—Since the receipt of the first specimen in 1874, I 
have obtained only one or two additional examples of this varity 
of the hydrated silicate of nickel and magnesia, It is ab once 
adherence to the tongue, and by its falling to pieces when 
immersed in water, and (like halloysite) even when allowed to 
It Pos he 
remain adherent to the t tongue | for a mom ment or 80. 
ap een carbonate of copper. I expect this a 
will be found in New Caledonia, but up to the present I have 
seen any authentic specimens. 
CoBaALtT. pee 
Up to the present the only cobalt-bearing mineral from cae 
Caledonia which I have had an opportunity to or obalé OF 
been of one kind, viz, the variety known as earthy ¢o 
asbolite or “wad,” i.e., = impure oxide of manganese ganese contain m1 
cobalt oxide. Ita arently occurs in he form of irre i 
mammillated surfaces, embedded in an unctuous red clay. 
is probably derived from _ decomposition of the 
other — of the distric put. usually 
se nodules are black or bluish-black in beat red 
superficially coated either with the sor ery ei or hen first 
oxide of iron. J understand that they are quite te soft w. 
