a new Eledirometer. >t 
of the book had lain in a damp place; which conjedture was 
farther confirmed by all the books becoming pofitive in damp 
weather, and one of them being dried at the fire again became 
negative. 
When the cap is approached with excited fealing-wax, the 
leaf gold may be made to ftrike the fides of the glafs more than 
twelve times ; and as the fealing wax recedes, it flrikes nearly 
as often ; but, if it approaches much quicker than it recedes, 
the fecond number will fometimes be greater. 
The quantity of electricity neceflary to caufe a repulfion of 
the leaf gold is fo fmall, that the fharpeft point or edges do 
not draw it off without touching; hence it is unnecefTary to 
avoid points or edges in the conft ruction of this inftrument. 
I am, &c. 
ABRAHAM BENNET. 
