Practical preventive medicine . rinding, mixing, filing con-tainers, soldering, House painting Enameling Glazing processes, etc Linotyping (Fig. 104), type set-ting, etc Compounding, mixing, etc Painting and sanding Painting Soldering Painting Metal refining Casting Soldering , Galvanizing, painting, etc 133 7 10733 36 25 461 5 43 6 71 1 4 1 33 From the foregoing it can be seen that the industries in whichlead products are employed are varied, and that men engaged OCCUPATIONAL INTOXICATIONS AND DISEASES 247 in considerably different occupations may suffer from leadpoisoning. Painte
Practical preventive medicine . rinding, mixing, filing con-tainers, soldering, House painting Enameling Glazing processes, etc Linotyping (Fig. 104), type set-ting, etc Compounding, mixing, etc Painting and sanding Painting Soldering Painting Metal refining Casting Soldering , Galvanizing, painting, etc 133 7 10733 36 25 461 5 43 6 71 1 4 1 33 From the foregoing it can be seen that the industries in whichlead products are employed are varied, and that men engaged OCCUPATIONAL INTOXICATIONS AND DISEASES 247 in considerably different occupations may suffer from leadpoisoning. Painters and those who sandpaper (Figs. 105, 106)painted work, workers in storage batteries, workers in rubbermanufacture, printers (Fig. 104) and workers in lead productsare the heaviest sufferers. The possibility of lead poisoningmust always be borne in mind in the clinical examination of anindustrial patient. 2. Channels by which Lead Gains Entrance into the Body.—In most manufacturing processes lead as a poison is encountered. 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
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