. Un traité pratique sur les maladies de la peau, à l'usage des étudiants et des praticiens. beingtermed rsection noyaux, nucléoles et granulés, fournit le describedfilaments déjà, qui produisent donc de continuité à travers tous les vivants le layersof éléments épithéliaux, ainsi que par les couches sous-jacentes du tissu conjonctif. L'épithélium sont non provisionnée avec sang-ou-lymphatiques navires ; mais, lorsqu'ils vivent, sont fournis avec un grand nombre de nerfs, qui, en forme de perles, des fibres très minute traversethe substance intercellulaire, et qui sont en communication directe avec le re

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. A practical treatise on diseases of the skin, for the use of students and practitioners. rsection beingtermed nuclei, nucleoli, and granules, furnishes the already describedfilaments, which thus produce continuity through all the living layersof the epithelial elements, as well as through the underlying layers ofthe connective tissue. The epithelia are unprovided with either blood-or lymph-vessels; but, when living, are supplied with a large numberof nerves, which, in the shape of very minute beaded fibres, traversethe intercellular substance, and which are in direct communication withthe reticulum of living matter within the protoplasmic bodies them-selves, , The living masses of protoplasm, just described, play the most im-portant part in all the pathological and physiological processes observedin the skin. It is probable that, in the embryo, all the appendages of 26 DISEASES OF THE SKIN. the skin are formed directly by their assimilative and reproductive pro-cesses; and it is certain that in health and in disease they furnish theorganic matter of all secretions. Fig. 7.. Prickle-cells from a condyloma (magnified about 625 diameters): a, cavity of cell-nucleus ;b, nucleus; c, nucleolus ; d, prickles—these are greatly developed on the protoplasm of the cells.The dots on the surface of the protoplasmic mass represent the appearance of the prickles whendirected toward the eye of the observer. Some of the protoplasmic threads are seen passing fromone cell to another. Next the corium is a layer of cells, columnar in form, and arrangedwith their long axes nearly at right-angles to the plane of that portionof the corium upon which they are superimposed. More externallythe cells are rounded or cuboidal in shape, with large, distinct nuclei.They are not arranged in definite strata except in the very outermostlayers, where the cells are somewhat flattened and elongated. Betweenthe cells in the deeper layers outwandered leucocytes may at times berecognized. The Stratum Gr

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