I 
GG4 LORD RAYLEIGH ON THE VALUE OF THE BRITISH 
passing through the corners of a brass triangle attached to the tube not far above the 
place where it emerged from the hollow axis. The points of the screws rested upon 
the same overhanging stand as in the former experiments (p. 113).* 
The larger diameter of the tube made the system so rigid that no mechanical dis¬ 
turbance of the kind formerly met with was to be detected at the highest speed to 
* June, 1882. The general disposition of the apparatus is shown in fig. 2, 
A. Stand for suspended parts. 
B. Frame of revolving coil. 
C. Driving cord. 
D. Electro-magnetic fork and telescope. 
E. Water engine. 
F. Principal telescope and scale. 
G. Copper connecting bars. 
H. Fleming’s bridge. 
I. Platinum-silver standard. 
J. Bridge galvanometer. 
K. Telescope and scale of auxiliary magnetometer. 
L. Auxiliary magnetometer needle and mirror, 
/ 
