[667] 
of B and attradllon of A, "be impelled froni B to A* 
with as much or more force than the air adjoining to 
A is impelled in the contrary diredtion ; fo that what 
little current of air there is may flow in the contrary 
diredtion. 
It is eafy applying what has been here faid to the 
Cafe in which B is negatively eledlrified. 
§ 5. In the paper of Mr. Canton’s, quoted in the 
fecond fedfion, and in a paper of Dr. Franklin’s 
(Phil. Tranf. 175 c, p. 300, and Franklin’s letters 
'p. 155.) arc fome remarkable experiments, fliev/ing 
that when an overcharged body is brought near an- 
other body, fome fluid is driven to the further end 
of this body, and alfo fome driven out of it, if it is 
not ihfulated. The experiments are ail flridlly con- 
formable to the I ith, 1 2th, and 13th propofitions : 
but it is needlefs to point out the agreement, as the 
explanation given by the authors does it fufliciently. 
. ' § 6. On the Leyden viah 
TKe fhock produced by the Leyden vial feemii 
Owing only to the great quantity of redundant 
fluid colledied on its pofltive fide, and the great 
deficiency on its negative fide ; fb that if a con- 
dudtor was prepared of fo great a fize, as to be 
able to. receive as much additional fluid by the 
fame degree of eledrification as the pofltive ‘ 
fide of a Leyden vial, and was pofltively eledri- 
fled in the fame degree as the vial, 1 do not doubt 
but what as great a fliock would be produced by 
making a communication between this condudor 
and the ground, as between the two furfaces of the 
4 Q 2 Leyden 
