upon the Leyden Phial. 1003 
placed from time to time at different diftances, as occa- 
lion required, and thus anfwered the purpofe of an elec- 
trometer. 
Whilft this inftrument was making, Dr. lind pro- 
pofed to Mr. cavallo and myfelf, that we fhould fee 
fome experiments at his houfe which he had made in 
confequence of thofe we had before tried at Mr. ca- 
Vallo’s. 
The apparatus he made ufe of was but fmall (fee 
fig. 1.); for the phial contained very little more than a 
pint, and the coating on its outward furface meafured 
no more than thirty-nine fquare inches. 
The refults of the feveral experiments we made are 
contained in the firft of the following tables, from which 
it will appear, that in twenty-three experiments there 
was not any one injlance where the ball was ftruck at a 
greater diftance than the point, nor even at the fame 
diftance. It is remarkable, that in two or three experi- 
ments where the point was farther off than the ball, 
both the point and the ball were ftruck at the fame time; 
which fhews, that the influence of the point, although 
placed at a greater diftance, was equal to the influence 
of the fpherical termination placed confiderably nearer. 
When the forked inftrument and electrometer were 
finifhed, it was found, that a fuperior force was necef- 
6 I 2, fary 
