Electro-Meteorological Observations. 305 
(1. and 2.) of different lengths, were placed at right angles. The 
longer of these (1.) was graduated into small equi-distant divisions, 
A movable arm (3.) which was graduated in the same manner, was 
- attached to the short arm, into which was let a bevel, (4.) 
Gy, 
( Aedes 
) 
| 
This instrument was attached to the front of the reel stand by 
means of a screw (8.) on which it could move. 
As soon as the kite was sufficiently elevated to produce an expan- 
sion of the electrometer leaves, the instrument was adjusted. until 
the small arm became le vel, and the movable arm was raised until 
it was parallel with the wire 
Then as the ber of divisions on the movable arm was to 
the length of wire out, so the number of divisions on the stationary 
Vol. “XXXII —No. 2. 39 
