Since air is invisible, we cannot perceive the wonderful way in which it does its work. But the work of water and its curative effects can be easily seen and understood.
All people know something of the use of steam as a curative agent. We often employ it in cases of fever, and very often severe head-aches can be cured only by its application. In cases of rheumatic pain in the joints, rapid relief is obtained by the use of steam followed by a cold bath. Boils and ulcers not cured by simple dressing with ointments can be completely healed by the application of steam.
In case of extreme fatigue, a steam-bath or a hot water bath immediately followed by a cold bath will be found very effective. So too, in cases of sleeplessness, instant relief is often obtained by sleeping in the open air after a steam-bath followed by a cold bath.
Hot water can always be used as a substitute for steam. When there is severe pain in the stomach, instant relief is obtained by warming with a bottle filled with boiling water placed over a thick cloth wrapped round the waist. Whenever there is a desire to vomit, it can be done by drinking plenty of hot water. Those who are suffering from constipation often derive great benefit by drinking