Is under the southern extremity of the new hotel. The proprietors have named it the Crystal Spring from the crystalline appearance of the water, which does not rise to the surface, but is pumped up from a depth of several feet. It was discovered in 1870 by experimental excavation. The characteristic, and to many disagreeable odor of sulphuretted hydrogen, is readily perceived. Sulphur veins, or iron pyrites, are found in all sections of this valley; one of the most provoking problems of the owners of the springs being to keep their fountains from a sulphur taint, the quantity and quality of which is not considered beneficial, while it injures the sale of the bottled water.

The Crystal Spring is somewhat alterative in its therapeutic effects.