I mentioned to you last year that in hundreds of tests of the saliva in cancer patients the reaction was found to be acid almost invariably, until corrected by dietary and other treatment. I have this test made and recorded daily, half an hour before meals and half an hour after meals, on my cancer patients in the New York Skin and Cancer Hospital. I have also the urine volumetrically analyzed each week, and the results all tabulated in columns on the history sheet, so that the changes may be compared weekly, in regard to each constituent, as treatment progresses. The same is done with the weekly studies on the blood, which I hope to present in full before long. I think, gentlemen, that from what I have said you can see that the medical aspects of cancer loom up pretty large, and yet we are only beginning to study the disease along these lines. We see, thus, that cancer is not primarily a surgical affection, and that the mere ablation of an offending portion of the body which has become diseased can never preclude a new portion from becoming affected, or prevent a recurrence in the same location; indeed, this often seems to be stimulated and increased by the trauma and by the deranged lymphatic and vascular circulation caused by the operation and the dissemination of actively growing cancer cells through these channels. This will appear more fully later when we come to study the increasing mortality of cancer during these later years of active surgery, and when we come to analyze the actual reports of operative procedures. I hope, gentlemen, that by these lectures I may succeed in satisfying your minds that if anything is to be done towards staying the steadily rising frequency and increasing mortality of cancer, it must be by carefully wrought out medical means, and not by the knife. LECTURE II INFLUENCE OF SEX, AGE, OCCUPATION, RACE, CLIMATE, AND FOOD ON CANCER While cancer is no respecter of persons, and affects all, rich and poor, old and young, male and female, there are some interesting features regarding the disease as it occurs under various conditions which are worthy of consideration. We have seen in the former lecture that cancer is not a definite something, from without, that attacks the human frame, but that it is only a faulty development and action of certain body cells, which were once normal, with a steady decline in bodily health which tends to a fatal issue in a very large proportion of those once affected with the disease.