~Adjusting the Diet.~--In any case where preliminary diet is prescribed the condition for which the operation is necessary determines the nature of the diet; for example, if the operation is to be upon the kidney, the diet beforehand would naturally be in the nature of a nephritic one to save the diseased organ unnecessary work. If the stomach or intestinal tract required surgical care, the diet would necessarily be formulated to meet the particular needs of the organ in question, an analysis of the stomach content furnishing the keynote of the diet. In any case the food must be simple in character and well prepared. All food in any way liable to bring about indigestion should be studiously avoided. ~Habits.~--The habits of the patient must be regulated so that she may not "overdo"; at the same time, gentle exercise may be the very thing needed to give an impetus to the appetite and thus assist in the adding of strength for the approaching ordeal. Many patients respond readily to a change of air and scene and frequent small meals instead of a few large ones,--a lunch in the mid-morning and mid-afternoon hours, consisting of a glass of milk and a cracker or malted milk chocolate or reenforced fruit juices. A cup of warm milk before retiring induces the much-needed sleep, hence is advisable under the circumstances. ~The Bowels.~--The bowels must be kept open. Coarse bread such as that made from bran or graham flour is advisable. Prunes and figs cooked with senna leaves are likewise simple laxatives which are both palatable and effective. For stubborn cases of constipation it is often found that a teaspoonful of a conserve made with a third of a pound each of raisins, prunes, and figs ground fine, with an ounce of senna leaves added, taken at bedtime and before breakfast, will overcome the condition and make the patient more comfortable and the general health better. ~Preliminary Light Diet.~--The day before the operation the diet must be light; the intestinal tract must not be filled with a food mass which is difficult to get rid of. On the morning of the operation the patient is given no food if the operation is to be performed at an early hour, otherwise a cup of tea, coffee, weak cocoa, or broth with a cracker is given. Some physicians give a glass of milk at this time, while others do not. It is the physician who must decide the question if there is any doubt about it. The stomach must be empty before administering the anesthetic. In certain emergency operations when it has been impossible to prepare the patient ahead, the difficulties attending the administering of the ether are sometimes greatly increased. The cleansing of the stomach and intestinal tract oftentimes eliminates or materially decreases the nausea and vomiting which so often forms one of the most dreaded sequences of the operation. For this reason many surgeons require the patient to be given lavage before leaving the operating room.