A physician, though young in years, yet of good promise, at Teplitz, (Dr. Richter) has written an interesting little work on these waters, and as it is in French, I would recommend it to the perusal of those who go to Teplitz for the purpose of bathing. During my stay at this celebrated spa, I had the advantage of Dr. Richter’s company and experience through the whole of the bathing establishments, and, through his influence, was permitted (being only a doctor) to visit the public baths—even those in which the women were bathing, with the greatest facility. It was at Schonau that I first saw the female bath in full operation. There might be about twenty women in the basin, when Dr. R. and myself entered. There was a slight commotion among the bathers on my first appearance, which quickly subsided, when my profession was announced and my privilege explained. Dr. R. published his work in 1840, and it is the most authentic guide and authority on the subject. I shall here give a condensed analysis of the small volume. The various sources of the waters here differ but little in their chemical, physical, or even thermal properties. The water is limpid, and does not become turbid by standing, nor does it disengage bubbles of gas or air, with the exception of the Gartenquelle. The temperature varies from 120° Fahrenheit (the Hauptquelle), to 80° (the Gartenquelle). The tunnels and reservoirs over which the waters pass become coated with a brownish-yellow substance, composed chiefly of silex and acidulated oxide of iron. There are other depositions and incrustations into which the carbonates of lime and magnesia, as well as manganese and strontia, enter. In the wells of Steinbad, Stadtbad, and Gartenquelle, there have been observed various _thermal oscillatoria_. These waters do not present the same slowness in boiling and cooling that some other hot spas have evinced. The great disproportion between the physiological action and the chemical composition of the Teplitz waters, has given rise to numerous speculations, and support the grand argument that there is an occult quality in mineral waters which defies our minutest chemistry. One thing is obvious, that these waters are alkaline, saline, and chalybeate—and consequently that they possess, at one and the same time, solvent and tonic qualities, which are greatly augmented by their temperature. Dr. R. very properly investigates their physical and physiological action, according as they are applied hot, warm, tepid, or cold to the body. They may be termed hot, when above 100°—very hot when approaching to 120°—warm at blood-heat (98°)—tepid, when under 90°—and cold at the temperature of the earth or air.