To compare the magnetic moments of magnets and to determine
moment of intertia, etc. Consisting of a polished wooden box
fitted with sliding glass door. The top of the case is slotted
and carries a glass tube fitted with torsion head to support
by means of silk fibre, a brass stirrup to carry magnets etc.
The base of box is fitted with a mirror strip, with a longitudinal
index line. Internal dimensions of box 160 x 66 x 66 mm approx.
Length of tube 140 mm approx. Size of stirrup 50 mm long x
45 mm high approx. Complete with one each 50 and 100 mm bar
magnets, and one each 50 and 100 mm brass bars.