( 3*9 ) 
a Circle on it ; hoping by this means, to excite or ob- 
tali Tome Difcovery from it* Yet, notwithftanding a 
(mart Attri ion was made on thar part, it was alto- 
gether unfuccefsful. Being tir’d, I let in the Air, and 
fufpended my farther tryals till the following Night. 
At vvhicb time, when I had exhaufted the Air from 
within toe Globe, I began the Attrition with a Coal 
Cinder^ which being fomewhat rough, I thought it might 
(hike the Parrs of the Mettal, and put them into fuch 
a State or Mode, as to exhibit an Appearance of 
Light : But this, and whatever elfe I then did try, was 
to no purpofe. In this exhaufted State I left the Globe 
on the Engine, to conftJer a little what farther tryals 
to make; with what Bodies, and in what manner to 
proceed with them: But to my great furprize, in about 
an Hour after (being in the next Room) I heard a 
Noife al uoft as loud as a Musket when fir’d $ and I im- 
mediately coming into the Room, found the Globe 
broken all to pieces (I mean the Glafs half of it) and the 
Brafs Hemifphere on the Ground ^ which I took up, and 
found fevcral bruifes it had received from the violent 
iftrokes of the broken Glafs, which had difperfed itfelf 
in pieces all over the Room. A large looking Glafs, at 
leaft three Yards diftant from it, was crack’d almoft from 
top to bottom, and quite crofs the middle, by a blow 
it received from a fragment of it ; for where it ftrack 
the Glafs, the Cracks proceeded from it every way, like 
fo many Radii drawn from a Center. Thus were the 
Experiments ended j and, as I hinted before, this Acci- 
dent I believe proceeded from the unconformablenefs 
that the Figure of the compounded Globe had to a per- 
fect Sphere, altho’ it did not differ fo much to fight, as to 
make me fufpeft any fuch Confequence. From rhefe Ex- 
periments I may fafely conclude, that if there be any fuch 
Quality as Light to be excited from a Brafs Body, under 
the fore-mentiond Circumftances, all the Attritions of 
B b b the. 
