Qbfervations in EleBricity. 107’ 
was many times difcharged through it ; and whether the 
bottle was charged pofitively or negatively, the pith-ball 
conflantly moved in the direction of the fluid, according 
to Dr. franklin’s hypothecs- This is a delicate experi- 
ment; but, as I have perfectly fucceeded in it, I thought 
it proper to give this fhort account of it. Perhaps if the 
pith-ball were fufpended by a filk firing, it might anfwer 
the purpofe as well ; but this I have not tried. 
E X P E R I M E N T. 
In melting fmall wires fome inches in length, I have 
often obferved the wire to become red-hot, firfl at that 
end in contadt with the ddl'charging rod, and the rednefs 
has proceeded gradually and regularly towards the coat- 
ing of the jars or battery;, plainly and fully demonflrating 
the direction of the eledtric matter in the difcharge of 
the jars or battery, which,, for this experiment, were al- 
ways charged poiitively. This phenomenon hath alfo 
* N 
been obferved by Mr. bell, and many times by Mr. 
NAIRNE* 
EXPERIMENT. 
Before I quit the fubjedl of the Leyden bottle, I fhall 
mention one experiment more which I have lately made, 
andwhich gives a full andcompleatanfwertoaparagraph 
in Dr. Priestley’s Hiftory of Eiedlricity, 2d edit, p, 465, 
1 . 21. It is this 1 1 procured fome phials coated with fil- 
P 2 ver. 
