The box is rectangular in
shape and provided with slits on three sides equally spaced to enable three
experiments to be performed simultaneously using one light source. Each slit is
provided with a cover so that it can be closed when not required. Bulb holders
of finest quality are fitted in wooden box with special cord.
a) Wooden box for 35 Watts S.V. Lamp
b) Wooden box for 55 Watts S.V. Lamp
