[ 5 1 4 ] 
foreign Phials ; in all which Matters had fucceeded 
agreeably to the foregoing Relation ; and that a fifth, 
into which he had dropped a leaden Bullet, had flown 
of itfelf, about a Quarter of an Hour after j but 
whether from any Operation of the Bullet, or from 
the Heat of the Room only, he could not take upon 
himfelf to determine. 
After this, he proceeded to make a good Number 
of Experiments upon the Phials ; by all which it 
appeared, 
That none of them, either foreign or Englijh , 
were broken by rhe Shock of a leaden Bullet weigh- 
ing 1 2 Penyweight : tho’ the fame was let fall from 
the Height of above two Feet. 
That all the foreign Phials, and feveral of the 
j Englijh, into which a Shiver of Flint, of the Weight 
of three Grains, was let fall, and that from a Height 
of only 2 Inches, were broken; mod of them in- 
ftantaneoufly, and the others within two or three 
Seconds. 
That feveral of them were broken with a fmall 
Shiver of their own broken Glafs ; but that, gene- 
rally, this Operation was not fo quick, the Phials 
fometimes not flying till two or three Minutes after 
the Shock. 
That feveral of them were fhiver’d immediately, 
by the Shock of a fmall Piece of harden’d Steel 
broken off from a fteel Rod of about half a Quar- 
ter of an Inch in Thicknefs. 
That of two Phials, into which a Boy’s playing 
Marble was dropped, the one broke presently, and 
the other not till three or four Minutes afterwards. 
That 
