For verifying the laws of vibrating strings, frequency comparisons with vibrating bodies, and determination of the frequency of a tuning fork by tuning a string in unison with it.
Consists of a hollow wooden resonance chamber measuring (l x w x h), 115 x 12 x 8cm, with two-meter scales graduated in millimeters. One end of brass and steel wire is fixed on the edge of the resonance chamber, and the other end of the wires are pegged with a tensioning key. Pulley and hook provided for the third steel wire to be tensioned by masses. Two movable bridges are also provided. Weights not included.