This consists in a decided diminution or a temporary total suspension of liquid of all kinds. It is well known that water constitutes about two thirds of the gross weight of the adult body. The quantity of water daily lost from the body has been estimated at about four and a half pounds. Dalton thinks that fifty-two fluid-ounces is the quantity required by a man in full health exercising in the open air. The difference between this and the amount of loss is made up by the water contained in food, especially in the succulent vegetables. Indeed, it is quite possible for the vegetarian, whose diet consists of fruits and vegetables, to receive sufficient water in this way for the purposes of his organism.

Physiological Effects of Dry Diet

Besides the tormenting sensation of thirst, the food is swallowed with difficulty and the appetite is lost. Absorption of the interstitial fluids takes place, and the volume of the organs undergoes diminution. The subcutaneous veins flatten, and the pulse loses in tension and amplitude; the saliva becomes viscid; the urine reddens and deposits a sediment; constipation ensues, and a rapid emaciation takes place (Fonssagrives).

Therapy

As the withdrawal or decided diminution of fluid causes rapid absorption of the interstitial water, this method of treatment may be resorted to with advantage in cases of dropsy. It has been used with success in dropsical accumulations of the serous cavities, and is adapted to the treatment of hydrothorax, hydrops pericardii, and ascites.

Fonssagrives reports two cases of diabetes insipidus (polyuria) decidedly benefited by the dry diet. This method of treatment is indicated in diabetes mellitus, in inflammatory affections, and in fevers— for it has been shown that the febrile temperature is in proportion to the amount of water furnished the tissues.

Dilatation of the Stomach, besides other appropriate treatment, is benefited by water-free food. That form of dyspepsia and dilatation of the stomach produced by excessive beer-drinking is much improved by abstinence from drinks of all kinds. The ice-water dyspepsia, a malady quite common during the summer months of this country, may be entirely relieved by dry diet.