Description : For the comparison of masses and for the distinction
between mass and weight. This apparatus comprises two
aluminium trays of size 135 x 50 mm, held at a distance of
about 200 mm by steel spring strips 10 mm wide attached to
their sides by wing nuts. One tray with three holes to accept
three equal cylindrical masses of size 100 x 250 mm length x
diameter. Three support steel pins fits into the radial holes
of cylinders.
