Page:Guide through Carlsbad and its environs.djvu/14



All the warm springs contain the same mineral constituents; they differ only in temperature, and, consequently, in the larger or smaller amount of carbonic acid gas they hold in solution. The Schlossbrunn contains most, the Sprudel the least free carbonic acid gas. Consequently, it is advisable to classify them as hot and tepid springs, instead of speaking of them, as of old, as strong and weak. We can best compare these springs to a tree: the Sprudel is the trunk, the other springs form the branches; and the longer and thinner the branch, the cooler is the spring.

One pound (16 oz.) of water from any of the springs contains about 42 grains of solid constituents, consisting of sulphate of soda, above 18 grs.;