Mangrove was successfully used in a case related by Bunyan of British Guiana. It was used in the shape of a decoction at the suggestion of a negress, an ounce being taken four times a day. In seven days the patient was so much relieved that the remedy was discontinued for two days, but the symptoms returned. They again disappeared when the drug was resumed, and two subsequent attacks were immediately cut short by the remedy. Roberts suggests that it may act as a parasiticide, {122} and suggests larger and sustained doses of the iodide of potassium for the same purpose. Retention of urine, when present, should be treated like the same symptoms under other circumstances, by catheterization, washing out the bladder with tepid water, warm fomentations, and similar measures. It has even been suggested to wash out the bladder with ether under these circumstances. As it seems impossible for the embryo filariæ to develop in the human body into the fully-developed Filaria Bancrofti, it is evident that with the death of the latter, which must occur sooner or later, the production of embryos must cease, while those previously produced must sooner or later also die, and in this way a spontaneous cure take place--just as a person infested with trichinous disease will ultimately recover if the introduction of the trichinæ cease and he is able to survive the irritation caused by the presence of the parasite in his muscles. In this manner we may account for the spontaneous disappearance of the disease in so many instances where all treatment has proved unavailing. {123} DISEASES OF THE BLADDER. BY EDWARD L. KEYES, M.D. Inflammation. The bladder is a patient organ, and rather slow to resent injuries from within or without. It never inflames on account of such general causes as the influence of cold, anæmia, cachexia, or a depressed state of the general system. Any of these causes may act as adjuvants, but alone they are not effective. Thus a chilling of the legs, inoperative upon an individual with a healthy bladder, is a prime factor in exciting inflammation in the bladder of an old man with an enlarged prostate; while the simple passage of a sound upon an individual suffering from anæmia might provoke a cystitis which the same traumatic cause would not have produced upon a patient in a thoroughly healthy condition. Yet inflammation of the bladder is very common. It is sometimes a malady, more often a symptom produced by some other malady (stricture, prostatic enlargement, stone), and only to be overcome by detecting and removing its cause. The causes of inflammation of the bladder therefore include nearly all the maladies to which the bladder is liable. The varieties of cystitis take name from that tissue of the viscus which is involved, and from the modality of the inflammation. We have--