There is one remarkable fact concerning the effects of water-treatment, as affecting menstruation, which should here be spoken of. Where a vigorous course of hydropathy is practiced for chronic disease, the menstrual function, in some cases, ceases for months, and even a whole year or more. I had first to learn this fact for myself, no other practitioner ever having promulgated the doctrine, so far as I know. And it is a remarkable fact, that in such cases no injury arises from the circumstance; but the individual’s health grows, month by month, in all respects better. No inconvenience is experienced from the suppression, nor need the slightest alarm be felt. The probable reason why menstruation thus ceases is, that a vigorous action of the skin is caused by the water process; elimination, or the throwing off of the waste, morbid, and impure matters, is made to go on so rapidly and vigorously, that there is no need of the purification of menstruation at the time. This doctrine, however, is conjecture and mere speculation, and one that does not appear to be susceptible of positive proof. That the occurrence does takes place, and that women have, at the same time, been remarkably benefited in health; cured, as we may say, of long-standing and most obstinate chronic diseases, we know to be a fact. But whenever retention of the menses occurs, and is not caused by pregnancy, or by the age of the individual, at which the function ceases naturally, or by a course of water-treatment, we are to suspect some derangement of the general health. This is a natural function, and if we find it ceasing when it ought to go on, we may safely conclude, that the efforts of nature are by some means thwarted; otherwise she would do her work. CHLOROSIS. Retention of the menses is very often attended with what is technically termed _chlorosis_. The word chlorosis signifies a greenish, or greenish-yellow hue of the skin, and might, therefore, be applied to certain affections belonging to both sexes; but the term is “generally confined to that modification of amenorrhea, which is attended by a dingy-pale, or greenish color of the skin.” Chlorosis also goes often under the name of _green sickness_. In this disease there is “heaviness, listlessness of motion, on the least exercise palpitations of the heart, pains in the loins, back, and hips, flatulency and acidity in the stomach and bowels, a preternatural appetite for chalk, lime, and various other absorbents, together with many dyspeptic symptoms.” In the progress of the disease the face and lips become pale, and after a time assume a more yellow hue; there is great general debility, flaccidity of the muscles, and not unfrequently, swelling of the feet and lower limbs; there is, in short, a great variety of symptoms, varying more or less, endlessly, as we may say, in different cases, and such as denote a very depraved state of the constitution generally.