Do not misunderstand me and think that I claim that each and every case of cancer, in any stage, can be cured. Alas, my sad experience with the many deaths from recurrent and inoperable cancer, especially in the New York Skin and Cancer Hospital, has taught me the contrary, and I have often been appalled at the impotence of human endeavor; although even these patients have often been grateful for the amount of benefit and relief afforded by proper measures, and in my former lectures I reported to you several such cases. But I do assert that the total percentage of cures in reasonable cases is far, far greater under the line of treatment I am presenting to you than under that most commonly employed. LECTURE IV INOPERABLE AND RECURRENT CANCER; METASTASIS; THE BLOOD IN CANCER We saw in our last lecture that surgery had failed to check the rising mortality of cancer, and that during the year 1915, in the United States Registration Area, the death rate had augmented from 79.4 to 81.1, or an increase of 1.7 persons in every 100,000 living; this was a greater increase than the average rise in the death rate for the preceding five years which was only 1.2 points. This, moreover, occurred during a still active period of laboratory research, with wide publicity as to cancer control, by education as to the benefit of early operation, and with active and skilful surgery. We saw that fully 50 per cent of all cases of cancer were quite inoperable when first seen by competent surgeons, while the average end result, or cure, in the cases operated on, for all kinds together, good and bad, slight and severe, did not total as much as 25 per cent; this makes but 12.5 of the entire number who applied for surgical relief. We quite naturally asked, therefore, if some form of medical treatment, including diet and hygiene, could not afford a better prospect of arresting this fearful mortality. It is especially in regard to the large number of inoperable and recurrent cases, comprising over 60 per cent of the whole, that this inquiry is particularly important. We will briefly consider these latter sad conditions.