65 
Process of reduction of tin ores illustrated by specimens from 
the Redruth Smelting Co. 
ANTIMONY. 
Case 14, Front. — Specimens of stibnite, the universal anti- 
monyore, from various localities in Japan, California, New South 
Wales, United States of Colombia and Greece. Many of the 
specimens bear an appreciable percentage of gold. 
Ingot antimony and products of smelting stibnite. 
Case 14, Rear. — Ores of metals of minor importance. These 
include ores of arsenic, bismuth, molybdenum, uranium and wolf- 
ram. 
MERCURY. 
Case 15. — A series of ores containing mercury and cinnabar 
and the rocks associated with them, from the New Almaden mines, 
California. Cinnabar is the red sulphide and the mineral from 
which mercury is chiefly obtained. Mercury ores from Spain, 
Russia, Mexico and the United States of Colombia are shown. 
NICKEL AND COBALT. 
Cases F and L — A complete series showing ores of nickel, 
processes of extraction and applications of the metal. Note as the 
principal ores, the bronze colored sulphide, pyrrhotite, and the 
apple green silicate, garnierite. 
Nickel ores from Canada, Oregon, Missouri and New Cale- 
donia. A chart near by gives the process of extraction of nickel 
from the Canadian pyrrhotite. As uses of the metal, are shown 
specimens of plating, nickel steel alloy for armor, salts of use in 
the arts, etc. 
ALUMINUM. 
Case 1. — Ores and products of aluminum. 
The ores from which aluminum is ordinarily obtained — baux- 
