Swimming does not always agree. This sometimes arises from a person being quite cold before he plunges into the water. Many people have an idea that they ought to go into the water while their bodies are in a cool state. Now this is a mistaken notion, and is likely to produce dangerous consequences. The skin ought to be comfortably warm, neither very hot nor very cold, and then the bather will receive every advantage that cold bathing can produce. If he go into the bath while the body is cold, the blood becomes chilled, and is driven to internal parts, and thus mischief is frequently produced. A boy, after using cold bathing, ought, if it _agree_ with him, to experience a pleasing glow over the whole surface of his body, his spirits and appetite should be increased, and he ought to feel stronger; but if it _disagree_ with him, a chilliness and coldness, a lassitude and a depression of spirits, will be the result; the face will be pale and the features will be pinched, and, in some instances, the lips and the nails will become blue; all these are signs that _cold_ bathing is injurious, and, therefore, that it ought on no account to be persevered in, unless these symptoms have hitherto proceeded from his going into the bath while he was quite cold. He may, previously to entering the bath, warm himself by walking briskly for a few minutes. Where _cold_ sea-water bathing does not agree, _warm_ sea bathing should be substituted. 304. _Which do you prefer—sea bathing or fresh-water bathing?_ Sea bathing. Sea bathing is incomparably superior to fresh-water bathing; the salt water is far more refreshing and invigorating; the battling with the waves is more exciting; the sea breezes, blowing on the nude body, breathes (for the skin is a breathing apparatus) health and strength into the frame, and comeliness into the face; the sea water and the sea breezes are splendid cosmetics; the salt water is one of the finest applications, both for strengthening the roots and brightening the color of the hair, provided grease and pomatum have not been previously used. 305. _Have you any directions to give as to the time and the seasons, and the best mode of sea bathing?_