Inasmuch as there is no specific medical antidote for cancer, and we cannot be certain of securing at once the metabolism of health, it is wise to remove and to keep away from the system those articles which have been shown to have more or less influence in its production, namely, animal proteids, coffee, tea, and alcoholics. Time does not admit a discussion of vegetarianism, nor is it necessary, for there is abundant evidence in literature and on every side that perfect health can be maintained thereby, and I went over the subject pretty thoroughly two years ago. The vegetable kingdom contains protein enough to build up and maintain the tissues of the body, as is shown in animals, and an extra number of calories can be easily obtained from butter, of which a quarter of a pound contains some 800 calories, or fully one-third of the total daily quantity required by most individuals. The details of a purely vegetarian diet, which experience has shown to be of the greatest value in cancer, can be worked out for individual cases as required. I am also firmly convinced that in this absolutely vegetarian diet, with other proper hygienic and medicinal measures, to be detailed next week, we shall find a great power for the prevention of cancer; although many persons are already so saturated with poisoned blood and tissues from prolonged errors of life, that perhaps no very striking general effect on the community can be obtained therefrom in this generation. In closing this lecture I must again urge upon you the necessity of great patience and perseverance, with very much careful study of the patient in all particulars, over a great length of time, if really favorable results are to be obtained in cancer; and this is true whether the disease be incipient, or fully developed, or even post-operative. The causes of cancer are deep seated, and, as with many chronic affections, there is no tendency to continue an improvement once begun, but under a return to the same conditions as before the disease will certainly assert itself. We have learned the lesson of assiduous perseverance in tuberculosis; let us learn it in regard to cancer. LECTURE V MEDICAL TREATMENT OF CANCER It is remarkable that so little serious attention has been paid to the medical treatment of cancer, in standard works, in view of the occasional strong statements and reports which have appeared from time to time in current literature and in occasional books, dating back for many years. Much of this, of course, relates to imperfect observation and erroneous diagnosis, and also to crude medical knowledge, but there have been also plenty of good men, who knew the disease and have reported favorable results, and even the complete disappearance of cancer, under dietetic regimen and proper medication alone, without operative interference of any kind.