To determine the frequency of A.C. mains, E.M.F. of cell and for Melde's experiment, with pulley and pan, workable on 220 volts A.C.

30 cm long adjustable C.P. bar fitted on base to determine the frequency of A.C. mains, workable on 6 volts D.C. battery

Comprising nicely polished wooden resonance box with brass fittings, complete with two moveable bridges, pulley and three different wires but without weights superior quality

With aluminium fittings, regular quality

University pattern, with thick brass C.P. tube and reservoir, fitted on nicely polished wooden plank, improved design, special quality

With Iron C.P. pipe and brass reservoir fitted on nicely painted metal strip, regular quality

University pattern, mercury reservoir held in clamp sliding on two steel C.P. rods fitted on wooden plank mounted on heavy cast iron base. Complete with two hard glass tubes but without mercury and rubber tubing

With two steel C.P. rods fitted on metal strip, regular quality

For Boyle's Law Apparatus, set of 2 tubes
A. Neutral glass
B. Borosil glass

With aluminium discs fitted on nicely polished wooden base
A. with 18 pulleys
B. with 24 pulleys