_Sudden heats and chills_ of all kinds are also productive of ill consequences; and in short whatever accident or operation the hair is subjected to, widely differing from its normal state, must produce, more or less, those diseases and that decay to which it is peculiarly liable. In every case it should be remembered, that the preservation of the hair depends not only on local stimulation, but also on constitutional treatment. This truth is the more to be insisted upon, as a common notion prevails that the mere application of certain specifics will remedy defects without any other aid. Above all, the advertised nostrums which boast of being able to effect such extraordinary results, are not to be relied upon, and in many cases should be cautiously avoided. The simple truth is, that these specifics owe their boasted productive and restorative powers to precisely the same principle that attends the simplest formula, namely, the stimulation of the skin; and the application, therefore, must be governed by the same laws, and attended with the same results in the one case as in the other. AFFECTIONS OF THE NOSE. The membrane that lines the whole alimentary canal from the lips and mouth downwards, has special peculiarities in particular places, according to the function it has there to perform: in the nostrils, as the external seat of smell, it is beautifully and remarkably adapted for its purpose; yet, though being so incessantly in active operation, it is, perhaps, the least affected part of the body. With the rest of the lining membrane of the mouth, it suffers from cold, or in affections of the stomach, discharging a thin fluid in cases of catarrh, and showing a dry, red, and irritable surface when the bowels and stomach are affected, hence the involuntary picking of children when they have worms; but of itself, besides a thickening of its coats from various causes, and thereby blunting the perception of smell, and obstructing the reverberance of articulation, and the occasional formation of that extraordinary zoophyte, the polypus, high up in the nostril, this part of the frame has no other disease appertaining to it. For the first, an occasional errhine, as a pinch of snuff, or the smallest atom of the white of hellebore powder, imbibed in the same way, with a course of aperient medicine, is all that is generally needed; though cases may occur in which leeches and a lotion may be demanded, but they are, however, very rare. The extraction, by surgical means, of the polypus, as no local or constitutional treatment has any effect on its growth, renders any further account here of this disease unnecessary. The external parts of the nose are, however, more frequently affected than the internal, the cuticle over the cartilage being subject to warts, inflammation, small painful pimples and abscesses, and to cancer. The warts are easily removed by a daily application of caustic or blue