Abstract
The position of this paper, in the quantum theory of liquids, is principally that of a critique of the contribution by Green. The relation of his formalism to wave-mechanics is discussed, and hydrodynamical equations are derived, in wavemechanical form, which are shown to be equivalent to Green's results. A formula for the boundary stress is arrived at, and it is shown that the difference between the kinetic and thermodynamic pressures—on which Green's explanation of the thermomechanical effects in liquid helium II is based—is identically zero, confirming the conclusions of Yvon and de Boer.

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