The universal desire of repairing, perfecting, and prolonging Life, has induced many ingenious men to try innumerable experiments on almost all the products of the Animal, Vegetable, and Mineral kingdoms, with the hope of discovering Agents, that will not merely increase or diminish the force or frequency of the Pulse; but with an ardor as romantic as the search after the Philosopher's Stone, they have vainly hoped, that Panaceas might be found possessing the power of curing "all the evils that flesh is heir to." The Editor of this book had originally an extremely Delicate Constitution;-and at an early period devoted himself to the study of Physic, with the hope-of learning how to make the most of his small stock of Health. The System he adopted, succeeded, and he is arrived at his forty-third year, in tolerable good Health; and this without any uncomfortable abstinence: -his maxim has ever been, "dum Vivimus, Vivamus." It is a pleasure to publish this new, high quality, and affordable edition of this timeless book.