A relation between ultra-sonic velocity and latent heat of vaporization

Several attempts have been made by different investigators to find the relation between ultra-sonic velocity in liquids and the physical properties. One such relation has been obtained by Rao empirically. Recently, Kishimoto and Nomoto have obtained a relation between temperature coefficient of ultra-sonic velocity and boiling point of a liquid. In this communication we present a new relation between ultra-sonic velocity and latent heat of vaporization