[ 10^7 3 
XLVIIL EleMrical Experiments , to explain how far the 
Phenomena of the Ele&rophorus may be accounted for 
by Dr. Franklin’s Theory of pojithe and negative Elec- 
tricity ; being the annual LeSlure injlituted by the Will of 
Henry Baker, Efq. F. R. S. By John Ingenhoufz, 
M. D. F. R. S. 
Rea<1 AVING had the honour of being ap- 
of the Royal Society to read the annual differtation on 
fome philofophical fubjedt, inftituted by our worthy 
member the late Mr. baker, I have endeavoured to pur- 
fue fome eledtrical experiments, to explain how far the 
Eleclrophorus perpetuus may be accounted for upon the 
almoft generally received theory of Dr. eranklin of 
pofitive and negative eledlricity. 
THIS eledtrical inftrument confifts of two different 
pieces ; viz. i. a metallic body, in the form of a plate, or 
any other convenient figure, furnifhed with an infu? 
lating handle, to be ufed for lifting it up; and 2. a flat 
non-condudting fubftance, fuch as glafs, refin, or fome 
pointed by the Prefident and Council 
* 6 M 2 
other 
