441 
1910-11.] An Apparatus for inducing Fatigue in Wires. 
feet, which has a lower stance at a distance of one foot from the ground. 
The brass rod T, which is six feet in length, is terminated by a soft iron 
plate. Above this plate a heavy mass, M, of the same material is fastened, 
whilst another such mass, L, is fixed above the point of suspension. This 
pendulum is supported by a short steel rod which rests between two pairs of 
friction wheels, and oscillates freely between them, passing through a rect- 
