[278] On the Law of Facility of Errors of Observations, and on the Method of Least Squares, Memoirs of the Royal Astronomical Society, vol. xxxix. p. 75.
[279] Méthode des Moindres Carrés. Mémoires sur la Combinaison des Observations, par Ch. Fr. Gauss. Traduit en Français par J. Bertrand, Paris, 1855, pp. 6, 133, &c.
[280] De Morgan, Penny Cyclopædia, art. Least Squares.
[281] Edinburgh Review, July 1850, vol. xcii. p. 17. Reprinted Essays, p. 399. This method of demonstration is discussed by Boole, Transactions of Royal Society of Edinburgh, vol. xxi. pp. 627–630.
[282] Letters on the Theory of Probabilities, Letter XV. and Appendix, note pp. 256–266.
[283] Encke, On the Method of Least Squares, Taylor’s Scientific Memoirs, vol. ii. pp. 338, 339.
[284] Quetelet, Letters on the Theory of Probabilities, translated by Downes, Letter XIX. p. 88. See also Galton’s Hereditary Genius, p. 379.
[285] System of Logic, bk. iii. chap. 17, § 3. 5th ed. vol. ii. p. 56.
[286] Philosophy of the Inductive Sciences, 2nd ed. vol. ii. pp. 408, 409.
[287] Essay on Probability, Useful Knowledge Society, 1833, p. 41.