[ 205 ] 
Exp. III. 
If a Ball (of Cork fuppofe for Lightncfs) be hung 
by a filk Line, and the excited Tube is applied to 
- it, it will not only be attracted, but will have an 
attractive Quality communicated to it from the Tube ; 
and if any light Bodies afe brought near the Ball, 
they will be attracted by it. 
Exp. IV. 
As the Tube, when flrongly excited, will not 
only attraCt, but afterwards repel any light Bodies 
brought near it, in like manner the Cork-Ball will 
be endued with the fame Property ; fo that a fmaller 
Ball will firft be attracted towards it, and then re- 
pelled from it, the fame as the Leaf Gold in Exp. 
2. and on touching any other Body it will be 
again attracted 5 and this may be repeated feveral 
times, provided the fmaller Ball is much lefs than 
the larger one, tho’ the EfFeCt will conltantly grow 
weaker and weaker, as every time the Idler Ball 
is attracted, it carries off with it fome of the elec- 
tric Virtue, and is likewife endued with the fame 
Properties as the larger Ball. 
Mr. Gray , Mr. Eufay, and others have obferved, 
that this electrical Quality is not only to be excited 
in Glafs, but in molt folid Bodies capable of FriCtion 
(Metals excepted) 5 tho’ in fome it will be fcarcely 
lenfible, and that it is found to be ftrongelt in Wax, 
Refins, Gums, and Glafs : And as Glafs is the eafielt 
procured of a proper Form, it has generally been 
ufed in making thefe Experiments. It has been fur- 
13 d 2 ther 
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