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Published online by Cambridge University Press: 20 January 2009
The possibility of the steady motion of a spherical vortex of constant vorticity in an infinite homogeneous liquid was first pointed out by Hill in the Phil. Trans., 1894, pp. 213–245. He had already discussed a case of motion which had for the surfaces always containing the same particles those given by the equation
a particular surface being
page 77 note * Basset, Hydrodynamics, Vol. II., p. 81, Equations (55) and (57) in spherical coordinates. The axis from which θ is increased is parallel to the direction of V