. Fic. 89~Section through four contiguous nodules which cause a single, rather flat elevation of the surface. (Tlioins.) mass, but are confined to the peripheral zone, where they are large and prominent. (See Figs. 88, 89, 90. 91.) When the nodules are very numerous and the mucous membrane is thrown into folds, the nodules projecting above the surface of one fold may come into contact with those from the contiguous ridge, and, by attrition, the superficial layer of epithelium may be worn away. It is very largely due to this secondary lesion that a considerable amount of

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Keywords: ., bookauthorwilliams, bookcentury1900, bookdecade1920, bookyear1921