Movement Disorders
Catatonia
Oct. 15, 2023
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Ore hearth and scotch hearth
"This is protected by a double hood, the flaring outer hood corning over the work plate, but not over the lead well, to the right, nor the car for gray slag, to the left. The photograph was taken purposely during an interval when there was no slag on the work plate, so that fumes would not obscure the view." (Source: Hamilton A. Lead poisoning in the smelting and refining of lead. Industrial Accidents and Hygiene Series No. 4. Bulletin of the U.S. Bureau of Labor Statistics 1914a;141:1-97. Public domain.)