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Oroya research

Addicks, Lawrence, 1878-
Oroya blister quality

Addicks, Lawrence, 1878-
New silver refinery

Addicks, Lawrence, 1878-
Morococha Lake mud

Addicks, Lawrence, 1878-
Milling Cerro ores

Addicks, Lawrence, 1878-
Metallurgical reports

Addicks, Lawrence, 1878-
Metal losses

Addicks, Lawrence, 1878-
Lead peroxide

Addicks, Lawrence, 1878-
Lead concentrates

Addicks, Lawrence, 1878-
Lead chloride

Addicks, Lawrence, 1878-
Electric furnaces

Addicks, Lawrence, 1878-
Copper specifications

Addicks, Lawrence, 1878-
Converter smelting

Addicks, Lawrence, 1878-
Cerro Coal and Coke

Addicks, Lawrence, 1878-
Bismuth metallurgy

Addicks, Lawrence, 1878-
Bagging

Addicks, Lawrence, 1878-
Altitude

Addicks, Lawrence, 1878-