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Abstract
Recent developments in the theory of melting are discussed, particularly those concerning the contribution of defects and the bifurcation of the on-site potential in the liquid. It is proposed that the configurational entropy for a nematic-isotropic transition is of the order of (1/3) R In 2. It is also proposed that a study of the mesophase-isotropic transition temperature, under conditions of steady flow, could provide a way of assessing the contribution of defects to the melting process.