"It will be perceived, by the tenor of the questions, that they are designed to embrace not only unfortunate results of a change of diet, but such as are favorable. There are, in our community, considerable numbers who have entirely excluded animal food from their diet. It is exceedingly desirable that the results of such experiments, so difficult to be found in this land of plenty, should be ascertained and thrown before the profession and the community. Will physicians, then, have the kindness, if they know of any persons in their vicinity who have excluded animal food from their diet for a year or over, to lend them this number of the Journal, and ask them to forward to Milo L. North, Hartford, Connecticut, as early as convenient, the result of this change of diet on their health and constitution, in accordance with the following inquiries? "1. Was your bodily strength either increased or diminished by excluding all animal food from your diet? "2. Were the animal sensations, connected with the process of digestion, more--or less agreeable? "3. Was the mind clearer; and could it continue a laborious investigation longer than when you subsisted on mixed diet? "4. What constitutional infirmities were aggravated or removed? "5. Had you fewer colds or other febrile attacks--or the reverse? "6. What length of time, the trial? "7. Was the change to a vegetable diet, in your case, preceded by the use of an uncommon proportion of animal food, or of high seasoning, or of stimulants? "8. Was this change accompanied by a substitution of cold water for tea and coffee, during the experiment? "9. Is a vegetable diet more--or less aperient than mixed? "10. Do you believe, from your experience, that the health of either laborers or students would be promoted by the exclusion of animal food from their diet? "11. Have you selected, from your own observation, any articles in the vegetable kingdom, as particularly healthy, or otherwise? "N.B.--Short answers to these inquiries are all that is necessary; and as a copy of the latter is retained by the writer, it will be sufficient to refer to them numerically, without the trouble of transcribing each question. "HARTFORD, February 25, 1835." This circular, or letter, drew forth numerous replies from various parts of the United States, and chiefly from medical men. In the meantime, the prize of the Boylston Medical Committee was awarded to Luther V. Bell, M.D., of Derry, New Hampshire, and was published in the Boston Medical and Surgical Journal, and elsewhere, and read with considerable interest. In the year 1836, while many were waiting--some with a degree of impatience--to hear from Dr. North, his health so far failed him, that he concluded to relinquish, for the present, his inquiries; and, at his particular request, I consented to have the following card inserted in the Boston Medical and Surgical Journal: