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Louis Schwartz, M.D.; J. P. Russell, M.D.
JAMA. 1940;115(6):448-449. doi:10.1001/jama.1940.72810320004009b.
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In the course of the study of hazards to the skin in the canning industry of California we came across a number of cases of dermatitis diagnosed by the local physicians as "can poisoning." We were puzzled by the term, not knowing whether it meant that the workers were affected with dermatitis from the contents of the can or from some other substance with which they came in contact during the process of filling the cans. It never occurred to us that the condition might come from new, unused tin cans. However, while making studies in a number of canneries, we found that the workers engaged in removing the new, unused tin cans from the freight cars and storing them in large storage rooms and then again removing them from the storage rooms to the traveling belts from which they are filled suffered from a dermatitis located principally in the


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