C 5° 7 ] 
by the Fall of very light and'minute Bodies dropped into 
their Cavities. And Mr. Ellicot , having very foon 
after caufed fome unnealed Glalfes to be made here, 
repeated with them fome of the fame Experiments, 
which he found to anfwer agreeably to what Dr. 
Bruni had mentioned. 
But it will further appear to be remarkable in 
the prefent Paper, that, according to the Experi- 
ments made abroad upon thofe GJaffes, it is not the 
Weight alone of the Bodies feverally dropped 
into them, which occafions their Rupture ; for 
fome certain Bodies break them with abundantly 
more Eafe than others of the fame or even much 
greater Weights : infomuch that fuch Phials as are 
lhiver’d to Pieces by the Fall of very fmali Particles 
of Flint and fome other Subftances, are neverthelefs 
capable of refilling the much greater Shock they re- 
ceive, in like manner, from a leaden Bullet, tho* 
fome Hundreds of times heavier than the Flint. 
The Author of the Paper is Monfieur Allamand y 
a Gentleman of Diftindion, Merit, and Learning, 
in Holland , a Perfon of great Curiofity, and parti- 
cularly well verfed in all the Parts of natural and 
experimental Knowledge. This Gentleman com- 
municated his Obfervations to the Hon. William 
Bentincky Efq,* of the Hague , a worthy Member 
of the Royal Society ; and who was pleafed imme- 
diately not only to tranfmit them over to the ‘Pre- 
fidenty but alfo to oblige him at the fame time, 
with a Number of glafs Phials, of the very fame 
Sort as thofe upon which Monfieur Allamand's 
Experiments had been made; that he might thereby 
be enabled both to report to the Society the Fads 
Ttt 2 he 
