In some diseases delirium occurs, not because of fever, but because of poisonous elements in the blood supplied to the brain. This is the case in liver and kidney troubles, when waste products are not got rid of by these organs as they should be. To get these organs to work, the best thing is to drink half a teacupful of hot water every ten minutes for two hours at a time. Do this once a day for two days. Probably it will cause purging, but that is part of the cure. If the case does not yield in any way to this, a large hot bran poultice should be placed over the whole of the _right_ side under the arm, from the spine right round to the breast-bone (_see_ Bran Poultice). This should be renewed if necessary, so as to keep up the heat for an hour. Next day place a similar poultice over all the lower part of the back, so as to help the kidneys and bowels. Dry after these poultices, and rub gently with warm olive oil. The delirium will usually yield to a few days of such treatment. We have seen the reason under such treatment return with a rapidity that astonished the medical attendant. He had given the patient three months to gain what was complete in less than one. _See_ Fever. Depression.--This is usually a bodily illness, though often regarded as mental only. It appears in loss of interest in all that otherwise would be most interesting. A mother loses interest in her children, a man in his business, and so on. Students, and children overpressed at lessons, are apt to suffer from it. It is simply the result of a drain of energy from the system, until the brain has an insufficient supply. Those who have the care of the young would do well to watch carefully against this state coming on. If it appears, all work should be given up, and as much play take its place as possible. No cramming of ideas into a weakening mind can ever be equal to the possession of health and energy, as a preparation for life. Treatment should be such as to restore energy. The whole back should be fomented with a large blanket fomentation, being rubbed with olive oil before and after. Let this be done for an hour in the morning; in the evening give the ARMCHAIR FOMENTATION (_see_). Carry this on for a week, and then rest for another week, only rubbing the back with a little hot olive oil each night. Cultivate open-air life; sleep as much as possible--eight hours at least, or better nine. Carefully prepared and easily digested food should be given, and change of company, scene, and climate are most effective helps; but rest from work is the chief matter. _See_ Restlessness and Worry.