Revolving about Fixed Aves... 269 
floor to be connected with a tin tube for containing shot or some 
other weight. ‘The cords are brought over the pulleys p, p, p, p, 
Fig. 3, at the centre, and secured to the dishes d, d, d, d, weigh- 
eft ‘ Fig. 3. 
ing one pound each, and. moving, with very little friction, on little 
wheels adapted to the strips or rails 7, 7, 7,7. By connecting this 
table with wheel-work, having bands or teeth acting on the hol- 
low cylinder as a spindle, by means of a weight or power sus- 
pended by a rope wound round an axle, and moving very slowly, 
a certain number of revolutions in a minute will be given to it 
by the power, in passing through a given space, and the four 
dishes will raise, by their centrifugal force, a weight in the tube 
below, proportionate to the velocity and their distance from the 
centre. If the moving power be then doubled, with a slight ad- 
dition to overcome the additional friction and atmospheric resist- 
ance, it will be found, that in moving through an equal space in 
the same time, it will give twice the former velocity, and the 
dishes, at the same distance from the centre, will raise in the tube 
below, in an equal time, quadruple the weight first raised. Then 
by loading the dishes and increasing or diminishing the velocity, 
and varying the distances of the dishes from the centre, a variety 
of experiments may be made, and weights may be raised, with 
corresponding distances and velocities proportionate to those given 
above. 
By observing the manner of performing the experiments with 
the magnetized bar, it will be seen that a centrifugal force is ex- 
cited, INDEPENDENTLY OF THE PROJECTILE FORCE, equal to the 
Vol. xxx1x, No. 2.—July—September, 1840. 
