On looking about us for some therapeutic system more satisfactory than the allopathic, simpler in its principles and more consonant with the laws of nature, we select for examination hydropathy, on account of the great success which has attended its practice, the simplicity and rationality of its processes, and the high recommendations it has received from several eminent men, amongst which we extract the following. Mr. Herbert Mayo, Senior Surgeon of the Middlesex Hospital, speaking of hydropathy, thus expresses himself:— “It (hydropathy) more than doubles our power of doing good. Of course it will meet with much opposition, but none, come from quarter it may, can possibly prevent its progress, and its taking firm root. It is like Truth, not to be subverted.” Sir Charles Scudamore, M.D., records his opinion as follows:— “The principles of the water-cure treatment are founded in nature and truth. We have in our power a new and most efficacious agent for the alleviation and cure of disease in various forms, and in proper hands as safe as it is effectual. I should be no friend to humanity nor to medical science if I did not give my testimony in its recommendation.” Dr. James Johnson, Editor of the Medical Quarterly, thus writes of hydropathy:— “Its paramount virtue is that of preserving many a constitution from pulmonary consumption.” These are no small recommendations for any system to possess. Let us, therefore, with the readers’ permission, proceed at once to examine the principles and mode of action of this novel system, and see how far it can prove the title it lays claim to, of being a true rational and natural mode of curing disease. The most eminent physiologists of the present day agree in regarding disease in general, as an effort of nature to relieve the system of matter injurious to its well-being. This being the case, the natural and common sense mode of curing disease, would obviously consist in assisting nature in its efforts to expel the morbid substance from the system, and thus relieve it from the danger which threatened it. Now, this is exactly the principle on which Hydropathy proceeds; it aids, encourages, and strengthens the efforts of nature to heal herself, instead of irritating, thwarting, and weakening those efforts, by the pernicious administration of drugs.