Manual of pathology : including bacteriology, the technic of postmortems, and methods of pathologic research . ranes in Part III.)In this type are included solid pigments arising from external sources,such as hard coal in miners, iron in laborers in iron manufactories, and,in stone cutters, particles of sand. Any of these insoluble pigments cansecure access to the tissue through a wound, in which they are probablyretained by the action of phagocytes. A form of this pigmentation, asit occurs in wounds, is seen in tattooing, also in the small grains of pow-der that may be forced into the skin in
Manual of pathology : including bacteriology, the technic of postmortems, and methods of pathologic research . ranes in Part III.)In this type are included solid pigments arising from external sources,such as hard coal in miners, iron in laborers in iron manufactories, and,in stone cutters, particles of sand. Any of these insoluble pigments cansecure access to the tissue through a wound, in which they are probablyretained by the action of phagocytes. A form of this pigmentation, asit occurs in wounds, is seen in tattooing, also in the small grains of pow-der that may be forced into the skin in powder explosions. In pneumoconiosis the foreign material enters by way of the air-passages, and may consist of any solid body that is capable of dissemi-nation in a sufficiently finely divided state to permit its the solid material is hard coal, the condition is spoken of as an-thracosis ; when the material contains iron, the affection is known assiderosis ; when composed of sand or of fragments of stone, as in stone-cutters, it is called lithosis or chalicosis. Potters pneumoconiosis—. Fig. 136.—Section of Lung Showing Infiltration of the Connective Tissue of the .-^levolar Wall byCoal-dust (Anthracosis).—{Rindfleisch.) kaolinosis^results from the inhalation of kaolin, a clay used in themanufacture of pottery. Dust pigmentation of the lung also occursin street sweepers and in the workers in shoddy mills, granaries, andother dust occupations. The inhaled foreign body is less likely to giverise to important tissue changes than the associated bacteria whichaccompany it or later enter the affected tissues. Of the inorganic sub-stances, Reckzeh holds that lime is the least injurious. Dusts oforganic origin, such as wool and hair, are the most dangerous. Oncethe pigment passes through the protecting membrane,—either skin ormucosa,—it reaches the lymphatic spaces, and may pass on to thelymph-nodes, or even further, eventually reaching the lym
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