A new viscosityhyphen;temperature relationship for liquids has been derived, and its application has been studied. The derivation is based upon the theory of viscosity by Eyringet al.,rectifying the ``activation energy'' term. The ``activation energy'' term has been shown to be equivalent to the free energy of formation of a surface and the error committed by previous workers regarding the evaluation of ``activation energy'' has been discussed. The proposed equation is free from any arbitrary or empirical terms, and since, in particular, it does not involve any quantities derived from viscosity measurements, it makes a direct calculation of viscosity possible.
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