bladder, produce a similar chemical solution. No — 
fact however, has come to light, which in any — 
degree favours the possibility of such destruction — 
by such means. The utmost that can, even judg: 
ing from the reports of those who lean to the a 
mission of such virtues in medicines, be with 
truth or reason admitted, is, that, what are called 
lithontriptics, may wear away the projecting 
a of some species of calculi, and by ren- 
§ them more smooth, may by this effect, ren- 
der them less tormenting. Messrs. Prevost and 
Dumas* have attempted to solve the stone, while 
* “A fusible human calculus was submitted to the action of 3 
galvanic pile, of 120 plates, for the space of twelve hours. 
The caiculus was placed in a vessel of pure water. The platin- 
um wires which served for poles, touched the opposite sides of 
the calculus. During the action of the battery the bases and 
horic acid came to their Tespective poles recombined, 
Before the experiment, the 
it 80 grains, The galvan- 
xteen hours, when the cal- 
ass, which was easily re 
the slightest pressure, 
* The result of this experiment naturally led to another, 
- mre ——. A calculus was fixed on a sound, npr 
wo platinum conductors, and the apparatus introduced into the 
leds of a dog, by means of an faction in the urethra under 
e€ 
which was prevented from returning, A battery of 135 plates 
j The animal was, at 
position. The experiment was then renewed and_ continued 
six days, one hour in the mornin, : ee a 
+ Our authors hope that means wili be found out to ad the 
EAlvani¢ action to those calculi in the human bladder h are 
