Plates illustrative of Wilson on diseases of the skin.

  • Wilson, Erasmus, Sir, 1809-1884.
Date:
1857
Catalogue details

Licence: Public Domain Mark

Credit: Plates illustrative of Wilson on diseases of the skin. Source: Wellcome Collection.

Provider: This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.)

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    Fig. 6. A thin fragment of scarf-skin, magnified 155 times, showing its con- struction of flat, polyhedral, overlapping scales, in some of which a nucleus is seen. Fig. 7. Vertical section of a portion of scarf-skin from the palm of the hand, magnified 155 times. In the lower part of the figure the section has cut across, and then proceeds nearly parallel with, a tortuous perspiratory tuhe. The cells, of which the scarf-skin is composed, are more open in the lowest than in the upper part of the figure; a nucleus, also, is seen in the cells of the lower stratum, while in the upper the cells are converted into thin scales. Fig. 8. A series of scarf-skin cells, magnified 310 times, showing the mode of growth of the cells, and their ultimate conversion into scales. These changes take place in the lower stratum of fig. 7. a. Primitive isolated granules, measuring about jjjsVttit of an inch in diameter, b. Aggregated granules, composed of several of the pre- ceding, measuring about yosVoir °f an inch. c. Nucleated granules, measuring about ^^ of an inch. d. Cells measuring v^sxs to ssVij of an inch. The deepest layer of the scarf-skin is made up of the four preceding elements and has the appearance of a smooth but irregular mosaic, e. Cells measuring ^n'o <y °f an inch. f. Cells measuring T5'ffff of an inch. g. Cells measuring j^^ of an inch. In all the figures from d to g, the cell is composed of a granular centre or nucleus, and of a number of newly-formed young cells, which are arranged around it. 7i. Two fully-formed cells, measuring ffo of an inch in longest diameter, and converted into flattened scales. These scales have resulted from the growth of the granules and young cells of g, so that the perfect cell contains cells of secondary formation, and, within some of the latter, smaller cells of tertiary formation; this is a good illustration of a parent cell. Plate 2. ANATOMY OF THE SENSITIVE SKIN AND NAIL. Fig. 1. A small portion of sensitive skin, comprehending two ridges, from the palm of the hand, magnified thirty-eight times. Each ridge is com- posed of two rows of clusters, and each cluster of a number of papillae. Between rows of papillae, at short distances, are seen the openings of per- spiratory tubes, a. One of the ridges. It is this arrangement of papillae which causes the appearance of the scarf-skin, shown in figs. 1 and 2, plate 1. Fig. 2. A portion of sensitive skin from the back of the hand, magnified thirty-eight times. The papillae are seen, singly and in small clusters, scattered irregularly over the surface. The scarf-skin, modelled upon such a surface as this, would have the appearance represented in figs. 3, 4, and 5, plate 1. FlG. 3. A section of the skin of the palm of the hand, the section being made through the middle of one of the ridges, and not across the ridges, as in plate 1, fig. 1, a. The figure is magnified thirty-eight times.