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22 are constantly being given off from the surface as more or less fine scurf, and as constantly being formed in the deeper parts which are contiguous to the dermis or true skin. The true skin is highly sensitive, being supplied with countless nerve-fibres and endings. It is also highly vascular, being supplied by those innumerable tiny blood-vessels called capillaries, though they are far finer thanany hair, of which I spoke just now. It contains the perspiratory or sweat-glands, the sebaceous or oil-glands, and the roots of the hair, which are fed by the latter.

There are many ways of proving that the skin is