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Production. Tin smelting. A laboratory assistant at a Southern tin smelter performs delicate analytical operations that determine the amounts of pure metal remaining in slags from the furnaces. Accurate laboratory control is one of the important reasons why the percentage of metal recovery from the South American ore used at the plant is remarkably high

Production. Tin smelting. A laboratory assistant at a Southern tin sme...

Public domain photograph of laboratory, science, research, free to use, no copyright restrictions image - Picryl description

Production. Tin smelting. A laboratory assistant at a Southern tin smelter performs delicate analytical operations that determine the amounts of pure metal remaining in slags from the furnaces. Accurate laboratory control is one of the important reasons why the percentage of metal recovery from the South American ore used at the plant is remarkably high

Production. Tin smelting. A laboratory assistant at a Southern tin sme...

Public domain photograph of laboratory, scientist, free to use, no copyright restrictions image - Picryl description

Accurate weight is recorded of the dehydrated vegetables in determining the degree of dehydration. Regional agricultural research laboratory, Albany, California

Accurate weight is recorded of the dehydrated vegetables in determinin...

Public domain photograph of laboratory, science, research, free to use, no copyright restrictions image - Picryl description

Production. Tin smelting. This young technician is using a laboratory balance to determine the amount of tin remaining in slag from the furnaces of a large Southern smelter which extracts the pure metal from South American ore. Accurate laboratory control is one of the important reasons why the percentage of metal recovery at the plant is remarkably high

Production. Tin smelting. This young technician is using a laboratory ...

Public domain photograph of laboratory, science, research, free to use, no copyright restrictions image - Picryl description

Production. Tin smelting. This young technician is using a laboratory balance to determine the amount of tin remaining in slag from the furnaces of a large Southern smelter which extracts the pure metal from South American ore. Accurate laboratory control is one of the important reasons why the percentage of metal recovery at the plant is remarkably high

Production. Tin smelting. This young technician is using a laboratory ...

Public domain photograph of laboratory, science, research, free to use, no copyright restrictions image - Picryl description

Production. Tin smelting. A laboratory assistant at a Southern tin smelter performs delicate analytical operations that determine the amounts of pure metal remaining in slags from the furnaces. Accurate laboratory control is one of the important reasons why the percentage of metal recovery from the South American ore used at the plant is remarkably high

Production. Tin smelting. A laboratory assistant at a Southern tin sme...

Public domain photograph of laboratory, scientist, free to use, no copyright restrictions image - Picryl description

Production. Tin smelting. Two laboratory assistants at a Southern tin smelter perform delicate analytical operations that determine the amounts of pure metal remaining in slags from the furnaces. Accurate laboratory control is one of the important reasons why the percentage of metal recovery from the South American ore used at the plant is remarkably high

Production. Tin smelting. Two laboratory assistants at a Southern tin ...

Public domain photograph of laboratory, scientist, free to use, no copyright restrictions image - Picryl description