As pancreatic diseases are among the most difficult to diagnose, and people suffering from them live and die, as do also many diabetics, without their particular state having been recognized, so, the rational treatment of these diseases being still imperfect, we cannot offer advice in regard to their prevention. But, at any rate, the safest course will be moderation in diet, especially fatty food, which exacts the active co-operation of the pancreas. As in the case of all other organs, long-continued overwork will exhaust this gland, and thus induce a diseased condition. Moderation in diet will be the best policy for the pancreas, as also for the liver; and to maintain these organs in sound working order, meat in particular should only be taken in small quantities, and fat also should not be partaken of in large amount. Milk and vegetable food, with but little meat, and that preferably as fish, will certainly furnish the best diet to avoid diseases of the liver. As Quincke[189] mentions, experience shows also that water in large quantities, especially certain alkaline saline waters, can increase the flow of the bile; and therefore, as also for other reasons mentioned in this book in Chapters XXXIV and XLI, water should be drunk in sufficient quantity every day. The alkaline waters referred to are certainly superior in their action to ordinary water, especially those kinds which at the same time cause purging. Footnote 189: Quincke: “Diseases of the Liver,” in Nothnagel’s “Practice,” 1907. Hot climates have a deteriorating effect on the liver. We have often noted the great frequency of liver complaints under these conditions, and we have never had a patient from the hot parts of Mexico who has not had a hypertrophied liver. We are inclined to believe that it is not so much the climate as faults in hygiene, especially in diet and in the use of stimulants, which are the cause of such a condition in Europeans residing in tropical climates. A vegetarian diet is certainly the best in tropical countries, as we personally found during a stay in Southern Florida, Texas, and Mexico. Just as for the kidneys, so for the liver, a bath, and particularly a sweat-bath, is of great benefit, since by means of it toxic products may be eliminated which would otherwise be carried to the liver. We have found these baths to be of great benefit in liver diseases, and considering the amelioration of the processes of oxidation brought about by such baths, it seems highly probable that they are capable of improving also the working condition of a liver not as yet diseased.