In Dr. Springsfeld’s Exper. (A) above, the urine of a person, who drank the Carlsbad waters, reduced, in 14 days, a piece of _calculus_, weighing 30 grains, to 25 grains. And in an experiment made by Dr. Newcome, now Lord Bishop of Llandaff, who drank four English pints of oystershell lime-water daily, his Lordship’s urine reduced, in four months, a piece of _calculus_, weighing 31 grains, to three small bits, weighing in all 6 grains[203]. Whence it follows, that the dissolving power of his Lordship’s urine must have been to the dissolving power of the urine of the person who drank the Carlsbad waters nearly as 35 to 65[204]. But if we consider, that the _calculus_ infused in the urine of the person who drank the Carlsbad waters was kept always in a heat of 96 degrees, while in Dr. Newcome’s experiment, which was made during part of the autumn and winter, no artificial heat was used, it will appear probable, that the dissolving power of his Lordship’s urine was little inferior to that of the person who drank the Carlsbad waters; for lime-water, in a heat of 96 degrees, dissolves the _calculus_ at least twice as fast, as in the common heat of the air in winter. Further, if it be attended to, that the quantity of Carlsbad waters drank every day before dinner is from six to eight lib. while his Lordship only drank four lib. of lime-water in 24 hours, it will follow, that whatever the different dissolving powers of the lime-water and Carlsbad waters may be out of the body, yet the former seems, in proportion to the quantity drank, to communicate at least an equal dissolving power to the urine. But without presuming to decide certainly, as to the comparative virtue of the Carlsbad waters and lime-water, I shall conclude with observing, that tho’ the Carlsbad waters are less disagreeable to the taste, and may be drank in larger quantity, than lime-water, yet this last may be drank equally good in all places, and at all seasons of the year; which is not the case with the Carlsbad waters. November 30. 1757. _An Instance of the Electrical Virtue in the Cure of a Palsy. By Mr._ Patrick Brydone. [Read Dec. 15, 1757.]