Hartfell-Water, is a vi-triolated chalybeate spring, which arises from a lofty mountain of the same name, about five miles from Moffat, in the county of Annan-dale, Scotland.

The rock abounds with iron pyrites, aluminous schistus, and ar-gillaceous stone, mixed with iron in different states. From the decomposition of these materials, the spring acquires its medicinal properties.

When first drawn from the • spring, the Hartfell-water appears perfectly clear, but it deposits gra-! dually part of its ferruginous ingredient, even when closely corked ; it retains, nevertheless, a large quantity of iron in solution, and has a strong astringent taste, similar to that of ink If it be preserved in close bottles, its properties remain undiminished for a considerable time.

This spring is said to be of con-siderable service in curing several obstinate disorders of the stomach and bowels; in dysenteric complaints, as well as in several periods of pulmonary consumption ; and in all cases of general debility. Much benefit has likewise been derived from the use of this vitrio-lated mineral spring, when employed both internally, and as an external application, in old and languid ulcers.

The sensible effects of the Hart-fell-water are sometimes giddiness and sickness, especially when a larger portion has been swallowed than the stomach can support. Hence, persons of delicate and irritable habits should at first take very small doses; for too large a draught is frequently rejected by the stomach, and occasions grip-ings in the intestines : hence it ought never to be employed as a direct purgative. An English pint is about the quantity which the generality of patients may safely consume in the course of a day, though its use may with advantage be continued for a considerable time. To render it, however, more suitable to weakly habits, it will be advisable to warm the water before it is drunk, as the difference of temperature will produce no material change in its medicinal properties.