Wave Motion Apparatus

For use on pump plate not less than 15 cm. diameters Electric Bell operating on 4-6 volts AC/DC, suspended on rubber cord in bell jar. Fine coiled wire connections to terminals mounted in rubber bung sealing the jar

To determine the standing longitudinal waves in column of air and velocity of sound in air, it comprises of a glass tube approx 1.2 meter length and 34 mm diameter. There is a tightly fitting but adjustable piston on a 390 mm long rod at one end of the glass tube. A loose fitting piston attached to a 1.2 meter long sounding rod at the other end of the glass tube, fitted on a wooden base.