10. I use bread made of unbolted wheat meal, in moderate quantity, when I can get it; plain Indian cakes once a day; milk once a day; rice once a day. My plan is to use as few things as possible at the same meal, but to have considerable variety at different meals. I use no new bread or pastry, no cheese, and but little butter; and very little fruit, except apples in moderate quantity. 11. The answer to this question, though I think it would be important and interesting, with many other particulars, I must defer for the present. The experiments of Dr. F., a young man in this neighborhood, and of several other individuals, would, I know be in point; but I have not at my command the time necessary to present them. LETTER III.--FROM DR. D. S. WRIGHT. WHITEHALL, Washington Co., N. Y., March 17, 1835. DEAR SIR,--I noticed a communication from you in the Boston Medical and Surgical Journal of the 5th instant, in which you signify a wish to collect facts in relation to the effects of a vegetable diet upon the human system, etc. I submit for your consideration my own experience; premising, however, that I am a practicing physician in this place--am thirty-three years old--of a sanguine, bilious temperament--have from youth up usually enjoyed good health--am not generally subject to fevers, etc. I made a radical change in my diet three years ago this present month, from a mixed course of animal and vegetable food, to a strictly vegetable diet, on which I subsisted pretty uniformly for the most part of one year. I renewed it again about ten moths ago. My reasons for adopting it were: 1st. I had experienced the beneficial effects of it for several years before, during the warm weather, in obviating a dull cephalalgic pain, and oppression in the epigastrium. 2dly. I had recently left the salubrious atmosphere of the mountains in Essex county, in this state, for this place of _musquitoes_ and _miasmata_. 3dly, and prominently. I had frequent exposures to the variolous infection, and I had a _dreadful_ apprehension that I might have an attack of the varioloid, as at that time I had never experimentally tried the protective powers of the vaccine virus, and had _too_ little confidence in those who recommended its prophylactic powers. The results I submit you, in reply to your interrogatories. 1. I think each time I tried living on vegetable food exclusively, that for the first month I could not endure fatigue _as well_. Afterward I could. 2. The digestive organs were always more agreeably excited. 3. The mind uniformly clearer, and could endure laborious investigations longer, and with less effort. 4. I am constitutionally healthy and robust. 5. I believe I have more colds, principally seated on the mucous membranes of the lungs, fauces, and cavities of the head. (I do not, however, attribute it to diet.) 6. The first trial was one year. I am now ten months on the same plan, and shall continue it.