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Published online by Cambridge University Press: 03 November 2016
page 220 note * M.N.E.A.S., 89, 636–641 (1929); 89, 731–739 (1929).
page 221 note * A new discussion of the forced motion has since been given by L. Rosenhead, M.N.R.A.S. Geophys. Suppl., 2, 140–170 (1929).