. A practical treatise on diseases of the skin, for the use of students and practitioners . f themedical man in order to permit of its auscultation and per-cussion. Pathology.—The microsporon furfur is readily recognized bythe aid of the microscope, as it exists in luxuriant profusionupon every affected surface. The scales may be scraped fromthe skin and at once examined, when innumerable clusteredspores and short mycelia become visible; the former highly re- 1 Tiailt- dAnalf mic Pathol., xi. p. , Paris, 1ST5. TINEA VERSICOLOR. 53 3 fractive and resembling in their circular and oval contou
. A practical treatise on diseases of the skin, for the use of students and practitioners . f themedical man in order to permit of its auscultation and per-cussion. Pathology.—The microsporon furfur is readily recognized bythe aid of the microscope, as it exists in luxuriant profusionupon every affected surface. The scales may be scraped fromthe skin and at once examined, when innumerable clusteredspores and short mycelia become visible; the former highly re- 1 Tiailt- dAnalf mic Pathol., xi. p. , Paris, 1ST5. TINEA VERSICOLOR. 53 3 fractive and resembling in their circular and oval contours, drop-lets of oil. Their aggregation in clusters is distinctive of thisamong the other forms of cryptogamic vegetation. They to .0084 mm., while the mycelia vary in diameter to .0038 (Duhring). Among the latter, sporophores aredistinguishable, with contained conidia and terminal elementsemerging at one extremity or the other of the spore-case. Bothelements are more readily stained by eosine and methyl-violetthan those of the trichophyton or of favus. Fig. Microsporon furfur. (After Kaposi.) One of the strongest arguments against the claim for theidentity of all the vegetable parasites, is furnished by the historyof this interesting mould. It never by any possibility invadesthe hairs or the hair-follicles, though it may be seen flourishingat the orifice of a follicular duct, and even beneath a vigorouspilary growth upon the chest of a male subject. It avoids thelight and the air; and singularly refuses to encroach upon cer-tain covered portions of the body, even preferring, in its ex-tremist development, to linger unobtrusively at the neck nearthe verge of the collar. Diagnosis—Here, as in all the parasitic diseases of vegetableorigin, the microscope may be required to decide the diagnosisin any case where a doubt might arise. In its simpler manifes-tations, the recognition of the affection is very readily location of the eruption;
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