Medical treatment lies mainly along the lines of elimination, which is always found to be faulty, both by the bowels and kidneys. My records of large numbers of private patients show that there is imperfect intestinal secretion, both in the very early stages and late in cancer, even before morphin is taken. Therefore I have long come to look upon intestinal auto-intoxication as a prime factor of causation, and lately Sir Arbuthnot Lane has spoken of cancer as a terminal result of intestinal stasis. This constipation, however, is not to be met with occasional purgatives, but by measures which will secure a good normal evacuation once or oftener daily. My principal reliance for this is cascara, in combination with other remedies, although I also very often give once a week, on alternate days, two good laxatives of blue mass, colocynth, and ipecac. Mineral waters, Russian oil, etc., are not desirable, and enemata are resorted to only in emergencies. The kidney secretion in early and late cancer is always faulty. This does not refer to albumen and casts, or sugar, which are searched for but seldom found. But very careful and repeated volumetric analyses of its many normal ingredients reveal errors in its composition which are of significance and which serve as a guide in therapy. There is always a faulty nitrogenous partition, and in that of sulphur; indican is commonly in excess, often very greatly so, and the chlorids and phosphates and sulphates deranged. The urinary secretion will constantly be found to be extremely deficient, both as to the actual quantity passed in the 24 hours, and in its total solid contents, which are often hardly one half of that called for by the body weight of the patient; this I have verified by hundreds of analyses. As these errors are corrected by proper treatment there will be a coincident improvement in the vitality of the patient and in the tumor. The remedy which I have largely relied on in these cases for many years is acetate of potassa, and it is interesting to note that Ross[7] of London claims that a cause of cancer is found in a disturbance in the mineral contents of the blood, and that there is a lack of potassa, and he gives as high as 90 grains of phosphate and carbonate of potassa in the day, with excellent results. I commonly give the acetate in combination with other remedies, thus ℞ Potass. acetatis ℥i, Tinct. Nuc. Vom. ℨiv, Ext. Cascara fld. ℨi-ℨiv, Extr. Rumicis radicis fld. ad ℥iv, M. Teaspoonful in water ½ hour before eating.