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Norah Hamilton drawing "'Canaries' in a Picric-Acid Plant," from Alice Hamilton's book "Exploring the Dangerous Trades"

 

"'Canaries' in a Picric-Acid Plant," drawing of four African American workers at a World War I-era picric acid plant by Norah Hamilton, Hull-House director of children's art; the plant was on the Canary Islands in the Passaic River in New Jersey