Pediatrics. . tches of Miss X gave, on maltosed agar, on glucosedagar, on beer-wort agar, and on placenta-glucosed agar, abso-lutely identical growths. On beer-wort agar (made by addingone-and-one-half per cent, of agar-agar to the sterilized and fil-tered beer-wort obtained from a brewery, neutralized and found tocontain about four per cent, of maltose) the most abundant andstriking cultures were obtained. In Erlenmeyer flasks, kept atroom temperature, the growth showed itself on the fourth day asa downy tuft which rapidly spread radially, the hyphse being verycoarse and hairy. About the tent
Pediatrics. . tches of Miss X gave, on maltosed agar, on glucosedagar, on beer-wort agar, and on placenta-glucosed agar, abso-lutely identical growths. On beer-wort agar (made by addingone-and-one-half per cent, of agar-agar to the sterilized and fil-tered beer-wort obtained from a brewery, neutralized and found tocontain about four per cent, of maltose) the most abundant andstriking cultures were obtained. In Erlenmeyer flasks, kept atroom temperature, the growth showed itself on the fourth day asa downy tuft which rapidly spread radially, the hyphse being verycoarse and hairy. About the tenth day the center became decid-edly yellow. At the end of two weeks, the culture presented itsmost typical appearance and might be described as a large, flat,circular, silky growth with a central button around which was adepressed chamois colored area. Around this was an elevatedwhite zone, surrounded by another brownish-yellow circle. Themargin was a delicate feathery fringe with a decided tangential ! • ! -. Fig. IV—Semi-diagrammatic drawing of a section of cats skin. Hair folli-cle invaded by the microsporon. Stained by M. Morris method. Scaleof drawing is in such proportion, that each spore at (B) represents aspore four micra in diameter in the section. A, Hair shaft. B, Sheathof spores, enveloping but not invading hair shaft. Entirely ectothrix. C,Epidermis. D, Dermis. , Sebaceous glands. E, Point at which theinvading mycelium breaks up into cuboidal spores which becomepacked into the mosaic or tesselated appearance. G, Bulbous endedportion of the invading mycelium. Root sheath widely separated fromthe hair shaft. H, Hair bulb. I, Connective tissue. J, Cross-section ofhair. RINGWORM 227 inclination to the left This tangential fringe has only been ob-served in this cat ringworm and only on beer-wort agar, and givesto the margin of the culture the appearance of a circular uniform deviation of the fringe cannot be explained by anytrick of inoculation or contrac
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