( 85 ; 
EXPERIMENT II. 
Again, after the Tube had been frefh rubb'd, and the 
Leaf-Brafs fcatter’d on the Table as ufual, if a piece of 
Paper was held to touch the upper part of the Tube, it 
would not attraft at all, altho’ approach’d very near 5 
but fo foon as the Paper was remov’d, it recover’d its 
Sphere of Adivity, which was very fcnfible, by giving a 
brisk motion to thofe Bodies, which juft before were 
Quiefcent. And it may be remembred, that it is menti- 
on’d in the Experiment for producing Light by the Ef- 
flnvU of the outward Glafs falling on the inward exhau* 
fted Glafs in Motion, that after the Motions were ceas’d, 
it was but approaching one’s Hand near theSurface of the 
outward Glafs, to produce a Light in the inward one : 
Whence, by thefe Experiments *tis plain, the Efflnvia 
within were puftit more vigoroufly on the inward Glafs, 
by the approach of the Hand without, otherwife no 
Light would have enfii’d. And farther to prove the 
ftiffnefs of the Body of the Effluvia^ *tis obfervable, that 
when a piece of Leaf-Brafs is hunted about a Room, that 
the Brafs fwimS or floats on the Surface of the Effluvia^ 
and as that is more or lefs exerted, fo the Brafs keeps its 
diftance from it, nor will by any means be fuffer’d to fink 
within it’s Sphere, unlefs it meets with a Body in its way, 
and then it is attradfed and return’d again feveral times 
with great fwiftnefs. 
