418 The American Geologist. June, 1894 
silver and nickel. Idaho and Montana showed small quanti- 
ties, and the latter state had wire silver disseminated through 
calcite, etc. Montana displayed native silver from Elkhorn 
and other localities, including a particularly noticeable speci- 
men of wire silver from the Butte and Boston mine. 
Michigan exhibited the largest collection of native copper, 
both crystalline and massive, some masses weighing several 
tons. Montana also had native copper, principally from 
Butte. 
Spain showed a fine collection of cinnabar, native mercury, 
and associated rocks, from Almaden. Mexico had this mer- 
cury sulphide from Guerrero, San Luis Potosi, etc.; Nevada, 
from the Washoe' district; and Russia, from the southern 
provinces. 
Canada showed the exceedingly rare platinum arsenide, 
sperrylite,* from the Vermillion mine of the Canadian Copper 
Company, which placed over one hundred grammes of this 
mineral on exhibition. New South Wales had platiniferous 
river sand and a small specimen of iridium. This country 
also gave the best exhibit of native bismuth and of bismutite, 
the carbonate. A nugget of platinum weighing over 150 
ounces was displayed in the Great Britain section, being ex- 
hibited by the celebrated firm, the Johnson-Matthey Co., of 
London. This firm also exhibited other rare elements, iridium, 
palladium, rhodium, osmium, etc. 
Pennsylvania exhibited beautiful radiating needle crystals 
of millerite (NiS), and massive pyrrhotite (Fe 1 1 S i2 ) contain- 
ing 2 to 5 per cent, of nickel, from the Gap mine, Lancas- 
ter county. Canada had a large display of nickeliferous 
pyrrhotite and associated minerals, from Sudbury; also 
specimens of niccolite (NiAs) and of gersdorffite (NiAsS). 
Oregon had beautiful specimens of garnierite,f a hydrous 
nickel magnesium silicate, containing 20 to 30 per cent, of 
nickel, from the Excelsior district, Douglass county. This 
mineral from New Caledonia was exhibited in the New South 
Wales section, together with noumeaite and asbolite. 
Pennsylvania also showed calamine* (H 2 Zn 2 Si0 5 +Fe 2 Q 3 ), 
*H. L. Wells, and S. L. Penfield, Am. .lour. Sei., HI. vol. xxxvn, pp. 
»>;-?:',. Jan., 1889. 
IF. W. Clarke, Am. .lour. Sei.. III. vol. xxxv. pp. 483-488. June, 1888. 
{J. Eyerman, Am. Jour. Sei., Ill, vol. xxxvn. p. 501, June, 1880. 
