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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

Substitute fuels tested. Emmet L. Reed, laboratory assistant at the U.S. Bureau of Standards, uses a special microscope to measure the degree of wear which substitute gasoline has produced on an automobile engine cylinder

Substitute fuels tested. Emmet L. Reed, laboratory assistant at the U....

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. 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...

Actual size of negative is C (approximately 4 x 5 inches). Caption card lists some of the printing history of image. Title and other information from caption card. Transfer; United States. Office of War Informa... More

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...

Actual size of negative is C (approximately 4 x 5 inches). Caption card lists some of the printing history of image. Title and other information from caption card. Transfer; United States. Office of War Informa... More

Chicago, Illinois. Locomotive lubrication chart in the laboratory of the Chicago and Northwestern Railroad. The laboratory assistant in foreground is working at a precision balance

Chicago, Illinois. Locomotive lubrication chart in the laboratory of t...

Title and other information from caption card. Transfer; United States. Office of War Information. Overseas Picture Division. Washington Division; 1944. More information about the FSA/OWI Collection is availabl... More

Substitute fuels tested. Emmet L. Reed, laboratory assistant at the U.S. Bureau of Standards, uses a special microscope to measure the degree of wear which substitute gasoline has produced on an automobile engine cylinder

Substitute fuels tested. Emmet L. Reed, laboratory assistant at the U....

Title and other information from caption card. Transfer; United States. Office of War Information. Overseas Picture Division. Washington Division; 1944. More information about the FSA/OWI Collection is availabl... More

Locomotive lubrication chart in the laboratory of the Chicago and Northwestern Railroad. The laboratory assistant in foreground is working at a precision balance. Chicago, Ill

Locomotive lubrication chart in the laboratory of the Chicago and Nort...

Picryl description: Public domain image of a locomotive, train, railroad, railway, free to use, no copyright restrictions.

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...

Actual size of negative is C (approximately 4 x 5 inches). Caption card lists some of the printing history of image. Title and other information from caption card. Transfer; United States. Office of War Informa... More

Locomotive lubrication chart in the laboratory of the Chicago and Northwestern i.e. North Western Railroad. The laboratory assistant in foreground is working at a precision balance. Chicago, Ill

Locomotive lubrication chart in the laboratory of the Chicago and Nort...

12002-1. Transfer from U.S. Office of War Information, 1944. General information about the FSA/OWI Color Photographs is available at http://hdl.loc.gov/loc.pnp/pp.fsac Title from FSA or OWI agency caption. Addi... More

Chicago, Illinois. Locomotive lubrication chart in the laboratory of the Chicago and Northwestern Railroad. The laboratory assistant in foreground is working at a precision balance

Chicago, Illinois. Locomotive lubrication chart in the laboratory of t...

Picryl description: Public domain image of a political campaign, politician, office meeting, 1930s, mid-20th-century United States, free to use, no copyright restrictions.