ON THE BLUE MOUNTAINS. 195 
leaf electroscope, even when the air was dry and matches for 
collecting it were burnt. Some experiments were made on a 
warm dry day (October 21) on the electroseope. A single rub 
with a white felt hat made the leaves diverge to the horizontal 
point, and they stood for a few seconds inclined 60°, and did not 
come together for two minutes. Mr. Hirst then stood on an old 
iece of glass, a divergence of some 20° was obtained. One 
get (atmospheric electricity), Mr. Hirst took the electroscope to 
a place where the telegraph lines were within reach, and hung it 
on one wire after another, without getting a sign of anything— 
which was the more remarkable, as there were thunder-clouds in 
therefore avoided so much of the worst part of the air nuisance 
(for such an astronomer may fairly call it). Could he but look 
um, 5865. ea 
Todine, 5866. Sulphur, 5866. Palladium, 5866. _—_Air line, 5866 A. 
Bromine, 5868. : . 
Mercury, 5871, 
Air line, 5872 B. 
Lead : 
ee Air line, 5879 C. 
Gold, 5880. Iron, 5880. 
Mercury, 5885. 
Molydenum 5887. 
Palladium, 5888. 
D!, 5889. 
[Two diagrams. ] 
