[ 353 3 
i®. — When the electrometer is placed on a non- 
electric, and the black flocking is prefented to it at 
the diflance of 3, 4, or y feet, according as it hap- 
pens to be more or lefs powerfully electrified, the 
balls begin to be vifibly attracted, and when it is 
brought nearer, they are feen to be agitated in a vio- 
lent manner. If, inftead of the black, the white 
flocking be prefented at the fame diftances, it is found 
to have precifely the fame effefts, attracting and agi- 
tating the balls in the very fame manner: From 
whence it appears, that whatever difference there was 
between the electricity of the black and the white, 
under other circumftances, they each of them ac- 
quire an equal degree of electricity, by being elec- 
trified together. 
2 °. — When the electrometer is fupported by glals, 
and the white flocking is prefented to it, it fir ft at- 
tracts the balls, and afterwards repels them ; when 
taken away, it leaves them in a repulfive flate with 
regard to each other ; when brought back, it repels 
them as before. If, in place of the white, the black 
be now prefented, the balls are immediately attracted, 
foon after again repelled, and left once more in a re- 
pulfive flate with regard to each other. If the white 
be again prefented, the fame train of effeCls takes 
place as before ; and fo on, alternately, as in the cafe 
of the clear and opaque glafs tubes, when excited ; 
the white Hocking anfwering precifely to the clear, 
and the black to the opaque tube, and aCting the one 
pojitively , the other negatively , at full as great a dis- 
tance, and as forcibly, as the tubes. 
3°. — Both the flockings, when held at a diflance 
from one another, appear inflated to fuch a degree, 
Vol. LI. Zz that. 
