( 22 ) 
One of that fmall number I had the Honour to maks 
before the Society, who were pleas’d to order a Repetiti- 
on of the fame next meeting, which accordingly was 
done, with feme little Additions $ and in obedience to 
their Commands to give an Account of it, which, fo far 
as occurr’d to Memory, according to my (lender Capacity 
for fuch a task, accept as follows. I took a Glafs Globe 
about 9 inches diameter, and having exbaufted the Air 
from within it, it was taken from the Pump 5 but firft a 
Cock was turn’d, which prevented the Air from re-enter- 
ing it. Thus fecur’d, and fixt for to give it Motion by 
she Great Wheel, deferib’d in Phil. Tranf. Numb. 304. 
which when turn’d gave a *fwift motion to the Globe, 
on whofc furface was apply’d my open and naked Hands, 
which in a very little time produc’d a confiderable Light. 
And ftill as I mov’d my Hands from one place to another, 
that the Humid Effluvia (which very readily condenfes on 
Glafs) might be difeharg’d from every part of it 5 (o did 
the Light improve, till Words in Capital Letters were 
legible by it, as was obferv’d the laft time by a Gentle- 
man then prefent. At another time, when I have made 
the Experiment, the Light produc’d has been Fo great, 
that a Large Print without much difficulty might be read 
by it t. And at the fame time, altho in a pretty large 
Room, the whole became fencibly Illuminated 5 the Wall 
at the fartheft diftance ( which was at lead to foot) was 
vifible. The Light appeared of a curious Purple colour, 
and was produc’d by a very flight and tender touch of the 
Hands, the Globe Glafs at the fame time being hardly 
fenfibly waim... Nor do I find a more immoderate Attri- 
tion to advance the Light any thing. Nor is the high^ft 
degree of Pxarifaftion of the Air in the Globe, ahfolutely 
aeceSary in the production of. this Light 5 for it feem’d 
to continue very little lefien’d in its colour or vigour, till 
( I believe ) more than a fourth part of its Air was let 
in. I have often ©bferv’d the fame, as to the Light pro- 
