120 



K'ew 

 Caledonia. 



Oregon 

 Tasmania, 

 Eiu"ope, and 

 otlier 

 localities. 



as ores. The nickel of commerce is derived almost entirely from 

 rocks and minerals, in which it occurs in varying quantities as 

 an accidental constituent. 



The ore consists of bands and veins of serpentine containing 

 varying proportions of nickel. The metal occurs in the form of 

 a silicate of nickel and magnesia, forming a mineral known as 

 noumeaite. Two varieties are known, a green and a brown ; the 

 miners, moreover, apply a number of local name?, such as " rose 

 nickel," " magnesia nickel," that have no definite meaning. It 

 would appear as if the nickel were concentrated in the serpentine 

 by a process of natural secretion, and it is probable that the 

 deposits are practically confined to the weathered portions of 

 the rock. The nickel is concentrated in the cracks and outer 

 shells of serpentine boulders. These outer shells are more 

 rotten than the harder kernels, and can be readily separated. A 

 large block of the ore is contained in the end compartment of 

 ■case 67. 



3423,553; beautiful specimens of grape nickel — so called 

 from the general appearance of the ore. 



8873 ; tabular crystallised form of noumeaite. 



8870, 8858, 8864 ; varieties of the serpentine country-rock, 

 locally supposed to be favourable or unfavourable to the occur- 

 Tence of nickel, as the case may be. 



8850 ; a serpentine boulder, in the outer portion of which the 

 nickel ore is concentrating. 



8869, 8845, 8860 ; red soil and pisolitic ironstone overlying 

 the deposits. 



3218, 3892 ; Noumeaite from Oregon. 



Emerald Nickel, hydrous carbonate; 6956 and 561, Tasmania. 



Millerite, sulphide of nickel ; Tasmania. 



Pentlandite, sulphide of iron and nickel ; 4071, Tasmania. 



Kufferniclcel, arsenide of nickel ; 582, 564, and 10360, Norway, 

 Hesse, and Tasmania, respectively. 



Nickeliferous Pyrrhotite ; 5944, Tasmania. 35S5, Ontario. 



Arsenate of Nickel ; 3891, >7evada. 



