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Steel manufacture, Allegheny-Ludlum. This quality steel tubing and piping will eventually be used to convey, refine or distill elements used in defense production. Expensive alloy steels are used, particularly for chemical piping. Special alloys have been devised to resist specific chemicals

Steel manufacture, Allegheny-Ludlum. This quality steel tubing and pip...

Public domain photograph of 1930s-1940s industrial development, no copyright restrictions image - Picryl description

Studying why fruits taste that way. E.K. Nelson of the Department of Agriculture is shown making tests with an apparatus which the Department imported from Germany for the purpose of studying the essential oils or "flavor-giving" content of fruits and vegetables. At present chemists are acquainted with the essential oils of only a few fruits, such as some of the citrus group. The apparatus is a vacuum distill which permits the distillation of liquids at temperatures much lower than usual by reducing the pressure, 1/10/31

Studying why fruits taste that way. E.K. Nelson of the Department of A...

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