On Spring street, corner of Putnam, in the rear of Congress Hall, and a short distance from Hathorn Spring. Its principal action is diuretic and, in large doses, cathartic. The mineral ingredients are the same as those of the other springs, but, owing to the peculiar combination, the medicinal effects are widely different. It has been found of great service in kidney complaints. From one to three glasses during the day is the usual dose. It should be used under the prescription of a physician, and warm drinks should not be taken immediately after. Persons suffering from "a cold" should not drink this water. It is not bottled.