( 55 ) 
Some Time after-, at J/r.WhelerV, we made the fol- 
lowing Experiment , i/z on&r fry whether the 
Eleftrick Attraction be proportional to the Quan- 
tity of Matter in Bodies. 
There were made two Cubes of Oak, of about fix 
Inches Square, the one folid, the other hollow : Thefe 
were fufpended by two Hair-Lines, nearly after the 
fame Manner as in the Experiment above-mentioned ^ 
the Diftance of the Cubes from each other, was by Efti- 
mation, about fourteen or fifteen Feet ; the Line of 
Communication being tied to each Hair-Line, and the 
Leaf-Brafs placed under the Cubes, the Tube was rub- 
bed and held over the Middle of the Line, and as near 
as could be gueffed, at equal Diftances from the Cubes, 
when both of them attracted and repelled the Leaf- 
Brafs at the fame Time, and to the fame Hight j fo 
that there feemed to be no more Attraction in the 
folid than in the hollow Cube \ yet I am apt to think 
that the Eleftrick Effluvia pafs through all the inte- 
rior Parts of the folid Cube, though no Part but the 
Surface attracts •, for from feveral Experiments it ap- 
pears, that if any other Body touches that which at- 
tracts, its Attraction ceafes till that Body be removed, 
and the other be again excited by the T ube. 
A Continuation of the Experiments made at 
Mr. Godfrey’-) - . 
I next went on with an Experiment, to fee if the 
EleCtrick Vertue might not be conveyed to a Rod, 
without inferting it into the Bore of the Tube, or 
without touching the Rod, which I found to fucceed, 
E a by 
