Quite recently, when I was personally under observation by Dr. Professor Zuntz in Berlin, to test the ease of my digestion of food as compared with others who paid less attention to mouth treatment of it, the good professor instructed me to "be as nearly like a little animal as possible, thinking nothing of anything." This isn't as easy for a "live-wire thinking outfit" as for an idiot, or as for an ingenuous little animal having no thought for the morrow, but the business physiologist does not scorn to go anywhere for light on Nature's requirements. One thing is sure, the person who has been faithful to his personal responsibility by starting the process of digestion as Nature demands can relax and enjoy metabolic and mental calm in delightful harmony more easily than one who has gluttony on his conscience and the wages of sinning on his stomach. These wages look big to the swollen greed of cultivated gluttony, but they are as bad as they are big, and the best way to be convinced of this fundamentally important fact is to realise the potency of head digestion for well or ill, and give it a practical trial. The key to good digestion is in the head, and the sooner mankind comes to realise this important truth the quicker will come the millennium of nutrition normality. DR. CANNON'S RESEARCHES I have just been reading Professor Walter B. Cannon's book in the Arnold Medical Monograph Series, entitled "The Mechanical Factors of Digestion." I have learned many valuable lessons from the intestinal observations of Dr. Cannon, and have seen the shadows he describes on his fluorescent screen under his practised guidance, and, with his generous permission, quoted him extensively in my book, _The A. B.--Z. of Our Own Nutrition_. It seems that we began our quest for light on the mechanics and mentality of digestion by objective observation about the same year, 1898. He took a hop, skip and jump over the three inches of the alimentary canal that is our personal responsibility and, with the aid of bismuth blackened food and a Röntgen-ray apparatus, began to study the movements incident to digestion by the shadows cast on the screen. For this purpose he principally used female cats, because they were more amenable than male cats to the torture of being tied flat to a cloth with the possible fear that they were condemned to death as well as to inactivity. Even the use of pink or blue ribbons as bands of bondage under the circumstances does not lure their cat-ladyships into the quietude demanded for normal movements of digestion, and male cats will not "stand for it" at all.