The general conditions to which each of the principal stoping methods is applicable have been stated briefly in the preceding pages. Variations of the principal
Many assay methods for the determination of gold or silver, or both, in cyanide solutions have been published, which with care in manipulation, and modification
The electric furnace has always been found to be especially adapted to melting, refining, and finishing processes throughout its gradual acceptance by metallurgists as a
The subject of stoping has been discussed at considerable length by Jackson and Gardner in a Bureau of Mines bulletin. Data in this bulletin were
Since the writer has been intimately connected with the development of manganese steel for many years, some remarks upon the early work with regard to
When mixed with common cast steel in quantities ranging from 11 to 13½ per cent. and properly treated, manganese increases the ductility of the metal
Shaft Stations, Storage, and Loading Pockets Arrangements for handling ore and waste at the shaft will depend on the method of hoisting (whether in buckets,
Ore passes are simply vertical or inclined openings for transfer of broken ore to the haulage system. They may be raises in the ore or
Gravity usually is employed wherever possible to move broken ore from stopes to the haulage levels, and ore-passes from the stopes terminate at the bottom
The object of the first classification done in cyaniding work was to produce a leachable sand and overflow as small an amount of sand as