[ 3 8 9 ] 
is to that of the Carlfbad water, in a heat of 96 de- 
grees,. as 15 to 14. 
From N°. 4. compared with (A), the diflblving 
power of foap is to that of the Carllbad water only as 
4 to 6; but it is probable, that had the folution of 
foap been kept in a heat of g 6 degrees, its diflblving 
power would, even in this experiment, have nearly 
equalled that of the Carlfbad water. It may, per- 
haps, be worth while to obferve, that a piece of the 
white chalky calculus of N 0 4. was not in the fmalleft 
degree diflolved by lying in lime-water 20 days.. 
5. In Exper. 19. of my Eflay on the Virtue of 
Lime-water, a piece of a calculus , b , weighing 31 
grains, loft 7 grains by being infilled 36 hours, in a* 
a heat of above 100 degrees, in very ftrong oifter- 
fhell lime-water. And in the fame water, of a mo- 
derate ftrength, another piece of b loft, in the fame 
time, f grains-.. 
In this laft experiment, the lithontriptic virtue of 
lime-water appears to be ftronger than in N°. 1. and 
2. above i and greatly exceeds that of the Carllbad 
water in Dr. Springsfeld’s Exper. (A) and (B). 
But altho’, from what has been faid, it appears 
not only that lime-water, but alfo a folution of loap, 
dilfolves the ftone in dole veflels as faft, nay fafter, 
than the thermae Carolina ; yet thefe laft waters, 
when the calculi were lo placed in open veflels, that 
the water from the fountain might conftantly flow 
along them, effected a much quicker diflolution than, 
lime-water, or even foap-lye, or indeed any known 
menftruum, except, perhaps, ftrong fpirit of nitre : 
for,.. 
