THE 
PHILOSOPHICAL MAGAZINE 
yANUARY 1790. 
I. Obfervations on Fire-Balls and Hard Bodies which have 
fallen from the Atmofphere.’ By Dr. CHLADN1 of Wit- 
temberg. From Profeffor Voict’s Magazin fir der 
Neueften Zuftand der Naturkunde, 1797. 
Since I wrote my laft effay on this fubject*, feveral 
new circumftances have been made known, which feem ftill 
farther to confirm my theory. One of the moft interefting 
phenomena of this kind was the fhower of ftones near 
Sienna, on the 16th of June 1794, of which an account has 
been given in the works of feveral Italian and other philofo- 
fophers; and in a paper, by Mr. Zolner, in the Berlin 
Monat/(chrift for September 1796. About feven o’clock in 
the evening of that day there appeared, at the above place, a 
longifh, round, dark cloud, totally infulated, which by its 
fingular appearance excited fear as well as attention, and 
was obferved, at the fame time, at various places lying at a 
confiderable diftance from each other. All of a fudden there 
fell, amidft the moft dreadful explofions, accompanied with 
lightning and a kind of vapour or fmoke which burft from 
* See Philofophical Magazine, vol-ii. p, 225. 
Vot. II. ys the 
