[ 4°o ] 
VIII. An Account of fome Ele&rical Experi- 
ments intended to be communicated to the 
Royal Society by Mr. Stephen Gray, F.R.S. 
taken from his Mouth by Cromwell Mor- 
timer, M. D. R. S. Seer, on Feb. 1 4, 
1735-6. being the T> ay before he died. 
AKE a fmall Iron Globe of an Inch or Inch 
and half Diameter, which fet on the Middle of 
a Cake of Rofin of about feven or eight Inches Dia- 
meter, having firft excited the Cake by gently rub- 
bing it, clapping it three or four times with the Hands, 
or warming it a little before the Fire 5 then fallen a 
light Body, as a fmall Piece of Cork, or Pith of El- 
der, to an exceeding fine Thread, five or fix Inches 
long, which hold between your Finger and Thumb, 
exa&ly over the Globe, at fuch an Height, that the Cork, 
or other light Body, may hang down about the Middle 
of the Globe : This light Body will of itfelf begin 
to move round the Iron Globe, and that conftantly 
from Weft to Eaft, being the fame Dire&ion which 
the Planets 'have in their Orbits round the Sun. If the 
Cake of Rofin be circular, and the Iron Globe placed 
exaftly in the Centre of it, then the light Body will 
deferibe an Orbit round the Iron Globe, which will be 
a Circle 5 but if the Iron Globe be placed at any Dif- 
tance from the Centre of the circular Cake, then the 
light Body will deferibe an [Elliptical] Orbit, which 
Experiment I. 
will 
