7
Histoire des Mathématiques, vol. iii. p. 378.
8
Bernoulli, De Arte Conjectandi, translated by Francis Maseres. London, 1795, p. 75.
9
Wallis’s Algebra, Discourse of Combinations, &c., p. 109.
10
Œuvres Complètes, vol. iii. p. 251.
11
See also Galton’s Lecture at the Royal Institution, 27th February, 1874; Catalogue of the Special Loan Collection of Scientific Instruments, South Kensington, Nos. 48, 49; and Galton, Philosophical Magazine, January 1875.
12
Wallis, Of Combinations, p. 116, quoting Vossius.