Published online by Cambridge University Press: 18 August 2016
page 67 note * Nordic stat. J. Vol. I, p. 103, Stockholm, 1929.Google Scholar
page 69 note * Aktádrské Vědy, Vol. III, p. I, Prague, 1932.Google Scholar
page 70 note * For further details see paper by Mr Kerrich, p. 105.
page 82 note * Nörlund, N. E., Varles, ü. Differenzrechnung, Kap. III, Berlin, 1924.CrossRefGoogle Scholar L. M. Milne-Thomson, Calc. of Finite Differences, Chap. VIII.