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Aluminum casting. A new development in the production of war materials involves use of magnesium. Here a young worker in a large Midwest foundry takes temperature readings of molten magnesium alloy through the protective crust. At the same time he is sprinkling flux to prevent burning at the hole in the crust after removal of the thermocouple. Aluminum Industries Inc., Cincinnati, Ohio

Aluminum casting. A new development in the production of war materials...

Picryl description: Public domain image of a worker, labor, factory, plant, manufacture, industrial facility, 1930s, mid-20th-century industrial photo, free to use, no copyright restrictions.

Transformer manufacture. Building cores for power transformers is highly skilled work. A new electric steel called hipersil is used in these cores, a steel which makes it possible to build smaller cores, and therefore use less copper and steel, both virtually needed elsewhere in the war program. In addition, this hipersil carries one third more magnetic flux than ordinary steel. Westinghouse, Sharon, Pennsylvania

Transformer manufacture. Building cores for power transformers is high...

Public domain photograph of Pennsylvania in 1930s, free to use, no copyright restrictions image - Picryl description