My present position is such, that no self-interest, if I could have any in a question of such importance for the human race; would induce me to publish this article, as a rush of scarlet-fever patients would only tend to destroy the practice at my establishment, instead of increasing my income. My purpose, therefore, must be honest; and the zeal which I have manifested for many years in the promulgation of the Water-Cure is no longer the effect of enthusiasm, but of the observations and practice of Priessnitz's method during the best part of a man's life, and the conviction of its merits gained from _facts_. I consider Hydro-therapeutics as one of the healthiest branches of the Tree of Medical Science, but not, like some others do, as the whole Tree. I do not pretend to be able to cure every thing with water; but in yielding to other medical systems what belongs to them, I earnestly claim for the Water-Cure, what belongs to it, frankly accusing for the little progress the hydriatic system has made in this country, the spirit of charlatanism and speculation on one side, and ignorance, self-conceit, self-interest and laziness on the other. According to my experience, and the result obtained by other hydriatic practitioners, eruptive fevers decidedly belong to Hydro-therapeutics, or the Water-Cure. If the result obtained by men like Currie, Bateman, Gregory, Reuss, Froelichsthal, &c., long before Priessnitz, were highly satisfactory, the important additions and the more systematic arrangement of the treatment of the inventor of the Water-Cure and myself, have made the method almost infallible in eruptive fevers, and my innermost conviction is, that all the other modes of treatment of these fevers put together will not do the tenth part of the service which may with certainty be expected from the systematic use of water as I give it in this treatise. Owing to the reluctance of the profession to allow Hydro-therapeutics an honorable place among medical systems, I address myself more to parents than to physicians. Had I intended to write for the latter, exclusively, the important subject which I am treating, would have received another coat. However, nothing of value to the physician has been omitted, whilst much has been said, which though _he_ does not need it, seemed to me indispensably necessary for people not initiated in the medical art.