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JAMA. 1927;88(19):1497-1498. doi:10.1001/jama.1927.02680450041024.
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Hygiene in the Zinc Industry  M. Biot recently reported at the sixth Congress of Industrial Chemistry the results of the medical inquiry instituted in 1925 in the zinc works. There were 325 workmen examined, of which number ninety-seven, or 29.84 per cent, presented a lead line on the gums and 170, or 52.31 per cent, basophil granulations in the red blood cells. Regarding records below 75 per cent (Tallqvist colorimetric scale) as deficient, it was found that in 20 per cent of the workmen the hemoglobin content of the blood was low. The conclusion is that impregnation with lead is unquestionable and frequent, but the effect on them is not usually sufficient to produce the ordinary symptoms of lead poisoning. Carbon monoxide appears frankly poisonous, but its action does not seem to be extremely marked among the workmen. Efforts are being made to diminish the risks of lead poisoning; extraction


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