inches of carbonic acid gas. The water of this spring forms an agreeable and refreshing beverage during the afternoon in warm weather; it is often used for bathing purposes on account of the quantity of carbonic acid gas it contains (there are four bathing tubs in the building); iron is frequently added to the water for the use of nervous patients suffering from debility and poorness of blood.
3. The Eisenquelle (Chalybeate spring) at the upper part of the Wiesenthal, has a temperature of 8° R. (50° F.); it contains scarcely 2 grains of solid constituents in 1 lb. of the water, and the principal part of these is oxide and biphosphite of iron. It does not contain any carbonic acid gas, and is a pretty strong and pure chalybeate water, used principally for bathing by people suffering from poorness of blood and muscular atrophy. For internal use it is advisable to add about one-third of Giesshübler Sauerbrunn, because if taken pure, it easily causes cardialgic pains.
IV.—THE NATURAL SPRUDEL-SALT AND “QUELLSALZ”.
This natural salt contains in 100 parts—sulphate of soda, 37.69; chloride of sodium, 0.39; carbonate of soda, 5.99; traces of sulphate of potash, and 55.52 parts of water. It is principally used to in-
