( *» ) 
was ; the other pointed at one End, and the other End 
not pointed, the Diameter of the Rods about half 
an Inch} they were firft forged, then filed and bur- 
nifhed. With thefe I made the following Experi- 
ments: When any of them were laid either upon the 
Brims of hollow Cylinders of Glafs well warmed, or 
upon Cakes of Rofin and Bees Wax, or uponthofeof 
Sulphur, the Phenomenon was the fame as when they 
had been fufpended on Silk Lines : But now I dis- 
cover’d another very furprifing one, viz. that after the 
Tube had been applied, and the Light feen at both 
Ends, upon my going to the other End of the Rod, 
when there was no Light to be feen, upon holding my 
Hand at fome diftance from it, then moving my Hand 
towards it with a pretty fwift Motion, there iffued 
from that Point of the Rod . a Cone of Light, as 
when the Tube had been applied to the other End j 
and upon repeating this Motion of my Hand, the fame 
Phenomenon appear’d for five or fix times fuccefiive- 
1 v, only the Rays were each time fhorter than the 
other* thefe Lights are alfo attended with a hiding 
Noife : That Light which appears upon that End 
next the Tube, when it is held obliquely to the Axis 
of the Rod, has its Rays tending towards it : All 
the Tiipe I am rubbing the Tube, thefe Flalhes of 
Light appear upon every Motion of my Hand up or 
down the Tube, but the larged Flalhes are produced 
by the Motion of my Hand downwards. 
z. When two or three Rods are laid either in a 
right Line, or making any Angle with each other, 
• or either touch, or are at a fmail Diftance from one 
another, the Tube being applied to one of their Ends, 
the furtheft End of the further Rod, exhibits the fame 
Phenomena as one fingle. An 
