To the question, whether any constitutional infirmities were aggravated or removed by the new course of regimen, the replies are almost equally favorable to the vegetable system. It is true that one of the physicians, Dr. Parmly, thinks the beneficial effects which appeared in the circle of his observation were the results of a simultaneous discontinuance of fermented drinks, tea and coffee, and condiments. But I believe every one who reads his letter will be surprised at his conclusions. No matter, however; we have his facts, and we are quite willing they should be carefully considered. The singular case of Dr. Preston, I now leave wholly out of the account. It was, as I have since learned, the story of a _very singular man_. Among the diseases and difficulties which were removed, or supposed to be removed, by the new diet, were dyspepsia, with the constipation which usually attends it, general lassitude, rheumatism, periodical headache, palpitations, irritation of the first passages, eruptive diseases of the skin, scurvy, and consumption. The case of Dr. Bannister, who was, in early life, decidedly consumptive, is one of the most remarkable on record. Though evidently consumptive, and near the borders of the grave, between the ages of twenty and twenty-nine, he so far recovered as to be, at the age of fifty-three, entirely free from every symptom of phthisis for twenty-four years; during which whole period, he was sufficiently vigorous to follow the laborious business of a country physician. The confidence of Dr. Wright in the prophylactic powers of a diet exclusively vegetable, so far as the mere opinion of one medical man is to be received as testimony in the case, is also remarkable. He not only regards the vegetable system as a defence against the diseases of miasmatic regions, but also against the varioloid disease. On the latter point, he goes, it seems, almost as far as Mr. Graham, who appears to regard it not only as, in some measure, a preventive of epidemic diseases generally, in which he is most undoubtedly correct, but also of the small-pox. The testimony on another point which is presented in the replies to Dr. North's questions, is almost equally uniform. In nearly every instance, the individuals who have abandoned animal food have found themselves less subject to colds than before; and some appear to have fallen into the habit of escaping them altogether. When it is considered how serious are the consequences of taking cold--when it is remembered that something like one half of the diseases of our climate have their origin in this source--it is certainly no trifling evidence in favor of a course of regimen, that, besides being highly favorable in every other respect, it should prove the means of freeing mankind from exposure to a malady at once troublesome in itself and disastrous in its consequences.