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 whilst 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. 312. _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 colour of the hair, provided grease and pomatum have not been previously used. 313. _Have you any directions to give as to the time and the seasons, and the best mode of sea bathing_? Summer and autumn are the best seasons of the year for cold sea bathing--August and September being the best months. To prepare the skin for the cold sea bathing, it would be well, before taking a dip in the sea, to have on the previous day a warm salt water bath. It is injurious, and even dangerous, to bathe _immediately_ after a _full_ meal; the best time to bathe is about two hours after breakfast-that is to say, at about eleven or twelve o'clock in the forenoon. The bather as soon as he enters the water, ought _instantly_ to wet his head; this may be done either by his jumping at once from the machine into the water, or, if he have not the courage to do so, by plunging his head without loss of time _completely_ under the water. He should remain in the water about a quarter of an hour, but never longer than half an hour. Many bathers by remaining a long time in the water do themselves great injury. If sea bathing be found to be invigorating-- and how often to the delicate it has proved to be truly magical--a patient may bathe once every day, but on no account oftener. If he be not strong, he had better, at first, bathe only every other day, or even only twice a week. The bather, after leaving the machine, ought for half an hour to take a brisk walk in order to promote a reaction, and thus to cause a free circulation of the blood.