7 
( 7io ) 
J^arth Fffulkes, Efq; a very ingenious Member of th« 
Society, did me the favour to be prefenc when I made 
the Experiment at my Houfe ; where w'e made four 
Tryals in the following manner. 
The whole Machine being fix’d, as above mention’d, 
we firft let fall a Guinea and two Papers ; the one placed 
over, and the ocher under it, (before any Air was pump’d 
" out) and the Guinea came to the Bottom when the Pa- 
pers were only in the Middle of the fecond Glafs from 
the Topi Then having laid a Feather on the Brafs*- 
Springs clofe by the Guinea, we kc them loofe both 
together ; and the Feather was fallen only down to the 
4th part of the Length of the firfl Glafs or ^ of the 
whole DKlance, when the Guinea was got down to the 
Bottom of the Receiver. We then laid two Papers 
and two Feathers, one of each under, and the other 
over the Guinea between the Springs ; and having drawn 
out (b much of the Air as to bring up the Mercury in 
tht Gage-Tube within a quarter of an Inch of the great* 
cR Height to which it could be then rais’d by the Prel^ 
Eire of the external Air, we caus’d the Bodies to fall 
all at once : And tho’ the Papers came down to the Bot- 
tom at the fame time as the Guinea, yet the Feathers, 
being much lighter, wanted about three Inches- But 
at lad, having laid the Papers, Feathers, and Guinea^ 
as before, we pampd out all the Air, and then the 
Feathers, as well as the Papers, came to the Bottom of 
the Receiver at the fame indant of time as the Guinea. 
yilf. Jn 
