The time for a resort to hot baths in rheumatoid arthritis is when the very violent pains have subsided sufficiently to allow of their employment; and while they may be hopefully used in the most chronic and advanced cases, the earlier they are employed the more curative they are. The temperature of these hot baths need not, as a rule, exceed 95 to 100° F., although some authorities approve of raising the temperature to 110° or 112° while the patient is in the water. A series of twenty to thirty such baths, taken every second day for ten to twenty minutes, is sufficient for one trial, and often effects very great improvement in the disease. The aggravation or return of pain in the joints which often follows the employment of warm baths will cease after the fifth or sixth bath. Garrod's experience of the Turkish bath is not favorable; it very often does much mischief by causing debility, and its excessive use has induced rheumatoid arthritis in persons previously free from the disease. Now, while it may be true that simple hot-water baths employed at home are as good as mineral thermal baths taken at their source, it is generally admitted that it is best to send persons who can afford the expense to the springs themselves, where they may drink the waters as well as employ them externally, and at the same time secure all the advantages arising from change of habits, scene, and climate, from restriction to a proper diet, and from the systematic employment of the waters and baths under the direction of persons experienced in their administration, etc. No reliable rules can be laid down for the selection of the mineral waters best adapted to each case: the stronger alkaline waters perhaps had better be used with great care, such as those of Carlsbad, Vichy, Mont Doré, Weisbaden, and after a course of thermal mineral baths at such places as Aix-les-Bains, Wildbad, Bath, Aix-la-Chapelle, etc., Garrod advises resort to some place where the air is bracing and the waters tonic or chalybeate, as Buxton, Spa, Schwalbach, or St. Moritz. In this country good results are often obtained at the Hot Springs of Arkansas and the Hot Sulphur and the Lithia Springs of Virginia. The use internally and in the form of hot baths of the mineral springs of Saratoga, of Michigan, of the Licks of Kentucky, and of California, of St. Leon and St. Catherine's (Canada), is frequently very beneficial. In the selection of the mineral waters to be drunk, and of the temperature and other qualities of the baths to be employed, careful attention must be paid to the condition of the functions of the skin, liver, kidneys, and nervous system; but space cannot be afforded here for the consideration of this extensive topic. Moreover, it occasionally happens that after failure of {100} sulphur or alkaline baths some other form may succeed, as the vapor or hot-air, or tepid or very hot-water bath. If decided benefit follow the first