[ 39 ° ] 
for, in tlie firff experiment made by Dr. Springsfeld, 
a calculus of two ounces and a half was, in this 
manner, quite diffolved in fix days. From this ex- 
periment, compared with that of Dr. Springsfeld 
mentioned above (B), it will be found, upon calcu- 
lation, that the diffolving power of the Carlfbad 
water, when it is allowed to flow conftantly from 
the fountain along the hone, is nearly 3 9 times 
greater than when it is only poured frefh on the cal- 
culus once a day *. What may have been the rea- 
fon of this furprifing difference of the lithontriptic 
power of the Carlibad water in thefe different cir- 
cum dances, I will not pretend to fay. I think it 
can fcarcely be accounted for from the gentle motion 
of the water along the furface of the calculus . Was 
it then owing to l'ome very volatile adtive part, which 
the water quickly lofes, after being taken from the 
fountain ? 
But how great foever the diffolving power of the 
Carlibad waters may be, when they iffue from the 
bowels of the earth, yet that they do not commu- 
nicate a much greater diffolving power to the urine, 
than lime-water, will appear from comparing the 
two following experiments. 
In Dr. Springsfeld’s Exper. (A) above, the urine of 
a perfon, who drank the Carlibad waters, reduced, 
in 14 days, a piece of calculus , weighing 30 grains, 
to 2y grains. And in an experiment made by Dr. 
Newcome, now Lord Biihop of Llandaff, who 
drank four Engliih pints of oyilerihell lime-water 
* Vid. EiTay on the Virtue of Lime-water, 2d edit. p. 176, 177. 
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