COMMIITFlE OF POOR-LAW MEDICAL OFCERS. 329woid, cellular tissue; 3, diseases of the vascular capillary plexus; 4, diseases of the chorion. This classification, although imperfect, is nevertheless valuable, as indicating a step in the right track. Before we adduce our own classification, let us briefly recapitulate the different tissues of which the skin is composed. These are-the arterial, venous, and lympbatic plexuses; the papillary bodies; the sudoriparous and sudoriferous apparatus, the

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... etory apparatus of the epidermis, the apparatus which secretes the colour. ing matters, the sebaceous follicles, the hair folli. cdes; the matter of the nails, and the cellular fibrous structure. We shall see the diseases which affect these several tissues in the subjoined table:-1. DISEASES OF THE VASCULAR PLExusEs.-Roseola,