Clinical lectures on the principles and practice of medicine . ulartissue of the skin (Bateman. Gallot, Thomson). According to Gruby theplants grow in the cells of the epidermis, the true skin is compressed, Fig. 494. Sporules developing on the surface of an apple, after three days. Fig. 495. The same after four days. Fig. 496. The same more fully developed on the human arm, after inoculation, a,Thalli, with pale walls; b, containing sporules (mycelia); c, mycelium separated fromthe thallus : d, sporules separated from the mycelium—(after Remak). 300 diam. 860 DISEASES OE THE INTEGUMENTARY SYS
Clinical lectures on the principles and practice of medicine . ulartissue of the skin (Bateman. Gallot, Thomson). According to Gruby theplants grow in the cells of the epidermis, the true skin is compressed, Fig. 494. Sporules developing on the surface of an apple, after three days. Fig. 495. The same after four days. Fig. 496. The same more fully developed on the human arm, after inoculation, a,Thalli, with pale walls; b, containing sporules (mycelia); c, mycelium separated fromthe thallus : d, sporules separated from the mycelium—(after Remak). 300 diam. 860 DISEASES OE THE INTEGUMENTARY SYSTEM. not destroyed, and the bulbs and roots of the hairs and sebaceous fol-licles are only secondarily affected. I have made observations to determine the correctness of this state-ment, aud have found that the whole inferior surface of the capsule isformed of epidermic scales, thickly matted together. These are lined byfinely molecular matter, from which the plants appear to spring, andwhich unites the branches and sporules together in a mass. Superiorly,. Fig. 407. however, the epidermic scales are not so dense; and I have always foundthem more or less broken up, and not continuous. This observation isvaluable, as indicating the probable mode in which these plants, or thesporules producing them, are deposited on the scalp. It will be seenthat the appearance of the peculiar porrigo capsule was invariably pre-ceded by a desquamation of the cuticle, that is, a separation or splittingup of the numerous external epidermic scales which constitute its outer-most layer. Hence it is more probable that the sporules, or matters fromwhich the vegetations are developed, insinuate themselves between thecrevices, and under the portion of epidermis thus partially separated, thanthat they spring up originally below, or in the thickness of the cuticle. The chemical constitution of the matter originally exuded is supposedby M. (kzenave to be allied to fat, but it appears to me to be more pro-
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectmedicine, bookyear187
