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May 12th is International Nurses Day!

We have a few nursing materials in our collections such as Chemistry for Nurses (1914), pictured above, and Applied Chemistry for Nurses (1926).

April is National Welding Month

Shown here is a general view of acetylene welding at the U.S. Department of Agriculture’s Fixed Nitrogen Research Laboratory located in Washington, D.C. The man visible in the photograph is identified as J.J. Connor. This photograph is believed to have been taken in the electrical shop located at the Laboratory.

“J.J. Connor at Work in Fixed Nitrogen Research Laboratory,” circa 1928. Travis P. Hignett Collection of Fixed Nitrogen Research Laboratory Photographs, Box 1. Science History Institute. Philadelphia.

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