It is exceedingly interesting to find an aged physician, especially one who had formerly been in the habit of using six pints of milk, and twelve ounces of unfermented biscuit, and of regarding that as a low diet, reducing himself to one half this quantity in his old age, with evident advantages; and cheerfully looking forward to a period, as not many years distant, when he should be obliged to restrict himself to half even of that quantity. How far he finally carried his temperance, we do not exactly know. We only know that, after thirty years of health and successful medical practice, he strenuously contended for the superiority of a vegetable and milk diet over any other, whether for the feeble or the healthy. But his numerous works abound with the most earnest exhortations to temperance in all things, and with the most interesting facts and cogent reasonings; and--I repeat it--if there be any individual, since the days of Pythagoras, whose name ought to be handed down to posterity as the father of the vegetable system of living, it is that of Dr. Cheyne. Among his works are, a work on Fevers; an Essay on the true Nature and proper Method of treating the Gout; a work on the Philosophical Principles of Religion; an Essay of Health and Long Life; a work called the English Malady; and another entitled the Natural Method of Cure in the Diseases of the Body, and the Distempers of the Mind depending thereon. The latter, and his Essay of Long Life are, in my view, his greatest works; though the history of his own experience is chiefly contained in his English Malady. I shall now proceed to make such extracts from his works, as seem to me most striking and important to the general reader. They are somewhat numerous, and there may be a few repetitions; but I was more anxious to preserve his exact language--which is rather prolix--than to abridge too much, at the risk of misrepresenting his sentiments.