=Sun Bath.=--The value of sunshine to animal and vegetable life is apparent to all. Plants become blanched and tender, and lack hardihood, if left without sunlight. Fishes in the subterranean lakes are dwarfed, and have no eyes. Tadpoles kept in the dark never develop into full-grown frogs. Men, growing up in mines or in dark prison cells, are sallow and ill-formed. When Fashion smiles upon brown arms and a tanned face, health is improved, and the darker skin is rendered more hardy and better able to resist exposure. Sand Baths have, at different times, been held in high esteem. The patient is buried in sand, except his head, and exposed to the full rays of the sun. The surface irritation caused by the sand, combined with the effect of the heat, produces a copious perspiration. Mud Baths and Pine Baths are popular in parts of Germany. In the former, the body of the patient is imbedded, for a time, in the thick paste or mud deposited by some of the mineral springs, or formed of a mixture of moor-earth and water. In the Pine Baths, a strong decoction is made of the fragrant limbs and tops of the resinous pine trees, which, blended with water, has a stimulating action on the skin. =Surf Bathing.=--Sea bathing is more invigorating than fresh water bathing. Persons who cannot bathe in fresh water are often benefited by surf bathing. The stimulating action of the salt water, the impact of the waves, the exhilaration and excitement occasioned by the incoming breakers, and the wholesome exercise which usually attends a sea bath, all contribute to the benefit of surf bathing. While the danger of chilling and taking cold are less in sea bathing, yet the usual precautions should be observed. If warm, do not wait to cool off before going into the water. This is always hazardous. Plunge boldly in, taking care to wet the head, neck, and face as quickly as possible. Exercise to keep up the circulation. Dive through the rollers, or jump up to prevent being overwhelmed by them. If, after being in the water a few minutes, there is a growing sense of chilliness which cannot be overcome by exercise, the bather, for his own safety, should withdraw at once, however enjoyable the occasion, and seek comfort in dry, warm clothing. A prolonged stay at the sea-shore will enable him to renew his bath daily, and gradually increase its length. At most, it should not exceed thirty minutes. Persons of vigorous constitution may take two dips a day with advantage. A short rest should follow the bath, whenever possible. But if reaction is not established by rubbing and putting on dry clothing, it should be restored by taking a short brisk walk before the rest.