1. Proc. Lond. Math. Soc., vol. 2, p. 371 (1904);Hydrodynamics, 3rd Ed. Art. 238.
2. Phil. Mag. (6), vol. 23, 1887;Papers, vol. 4, p. 303. See also Rayleigh,Phil. Mag. (6), vol. 21, 1911. The method had been employed by Stokes (1850); see hisPapers, vol. 2, p. 341.
3. Hydrodynamics, Art. 229.