Lycopodium Powder   (SW-2546)

For use in Kundt's tube, 100 gm, packed in bottle.

Cork Dust   (SW-2547)

For use in Kundt's tube 100 gm, packed in bottle.

Bell in Vacuum   (SW-2548)

For use on pump plate not less than 15 cm dia. Electric bell operating on 4-6 Volts AC/DC, suspended in bell jar with wire connections to terminals, mounted in rubber bung, sealing the jar.
a) Bell Jar 225 x 150mm (h x d)
b) Bell Jar 200 x 100mm (h x d)

Resonance Apparatus   (SW-2549)

Glass Tube approx. 84cm long and 2.5cm dia mounted on retort stand with clamp and boss, with 500ml glass bulb supported on iron ring, connecting rubber tubing and spring clip.

Spares Glass Tube for
Reservoir Bulb for

Resonance Apparatus   (SW-2550)

It consists of a tube 100cm long, 25mm dia mounted on a stanr which is fitted with leveling screws. The lower end of the rubber tubing provided is connected to the 500ml reservoir which slides on a metal rod and can be raised or lowered for adjusting the length of column of air. It is used to measure the velocity of sound . waves in air at room temperature by using a tuning fork.