Dr. Chladni’s Invention of the Eupbon. 391 
riments fhould confirm the difcovery of Dr. Pearfon, who 
fays he found the Jame acid in arthritic concretions, this de- 
nomination would ftill be very proper, either becaufe the 
- conftant feat of this acid is the human urine, or becaufe it 
is always more abundant there than in articulations attacked 
by the gout; or, in the laft place, becaufe it appears, in 
fome meafure, in fits of that difeafe, to be driven and carried 
from its ufual channel towards the extremities of the bones, 
the articular membranes of which it irritates. 
VIIL. On the Invention of the Euphon, and other acouftic Dif3 
coveries of C.F. F,. CHLADNI, Doétor of Philofophy and 
_ Law, Fellow of the Royal. Society of Gottingen, corre= 
Jjonding Member of the Imperial Academy of Sciences at 
Peterfburgh, &e. 
Many perfons who interefted themfelves in favour of 
Dr. Chladni and his inventions having expreffed a with of 
becoming acquainted with the hiftory of them, the Doétor 
drew up a fhort paper on that fubje&t, which he tranfmitted 
to one of the German Journals*, and from which we have 
extracted the following particulars. The author firft ob- 
ferves, that the invention of the euphon and all his other 
acouttic difeoveries were not the effects of chance, but the 
fruit of long and continued reflection. The rather confined 
education which he received, both in his father’s houfe and 
at the {chool of Grimma, did not produce on him the ufual 
but a contrary effect, as it inclined him very early to think 
and to act for himfelf. At the age of only fix or feven, 
when he ought to have been ctherwife employed, he would 
fit whole hours {tudying maps and books of geography, and 
with, at the fame time, that he might have an opportunity 
_ of travelling over all the countries which he faw reprefented 
before him. His father, firft profeffor of law at Wittenberg, 
_ * Magazin fiir das nouefte aus der Phyfik, vol, ix. part 4, p. Too. 
Cc4 whoa, 
