SILVER MINING IN ONTARIO Part 2

Description

Shows silver mining and processing operations in mines of northern Ontario, Canada. Workers use electric drills and explosives to loosen the ore. The silver ore is graded, crushed by stamping machines, concentrated in cyanide tanks, and poured into molds after the smelting operation. Shows the scaling of mine areas with timber to prevent cave-ins.

Collection

Records of the U.S. Bureau of Mines

Series

Assorted Films