Practical preventive medicine . Fig. 104.—Showing installation of exhaust system for linotype machine has a molten pot of type metal (lead alloy) from which lead fumesarise. (Bull. 209, Bur. Labor Stat.) in the form of dust, as well as in lead smelting and the manufac-tures of lead carbonate. Absorption by the lungs appears tobe slight, the greater amount of dust gaining entrance by thealimentary canal. Most dust is caught in the nasopharynxand swallowed with the mucous secretions. The dust on enter-ing the stomach reacts with the hydrochloric acid and solublechlorids are formed
Practical preventive medicine . Fig. 104.—Showing installation of exhaust system for linotype machine has a molten pot of type metal (lead alloy) from which lead fumesarise. (Bull. 209, Bur. Labor Stat.) in the form of dust, as well as in lead smelting and the manufac-tures of lead carbonate. Absorption by the lungs appears tobe slight, the greater amount of dust gaining entrance by thealimentary canal. Most dust is caught in the nasopharynxand swallowed with the mucous secretions. The dust on enter-ing the stomach reacts with the hydrochloric acid and solublechlorids are formed which are absorbed. When it reaches theblood it is believed to form a rather insoluble albuminate. Iffood is eaten at the same time less lead will be converted to 248 PRACTICAL PREVENTIVE MEDICINE. Fig. 105.—Dry sandpapering. Dry sanding of paint is a frequent cause oflead poisoning. The operation fills the air with tiny particles of lead dust.{Industrial Dis., Am. Labor Legislation Review, 1912.)
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