Abstract
The method consists essentially in the measurement of the time for a quarter vibration of a short wire clamped at one end. The wire breaks a circuit as it starts its transverse vibration, and is made to strike a very light lever and open another circuit just as it completes one-quarter of its first vibration. The time between the two events is measured ballistically. From a knowledge of the time of vibration, the length, the diameter and the density of the wire, Young's modulus can be readily calculated. The method is particularly suitable for thin wires having a diameter of the order of 0.015 cm. and a length of about 2 cm. The results are consistent to a few per cent. Comparison of the results with the accepted values for five different wires shows a good agreement.
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