[258] See, for instance, the Compensated Sympiesometer, Philosophical Magazine, 4th Series, vol. xxxix. p. 371.

[259] Grant, History of Physical Astronomy, pp. 146, 147.

[260] Quetelet, Sur la Physique du Globe, p. 174. Jamin, Cours de Physique, vol. i. p. 504.

[261] Baily’s Account of Flamsteed, p. 376.

[262] The Transit of Venus across the Sun, by Horrocks, London, 1859, p. 146.

[263] De Morgan, Supplement to the Penny Cyclopædia, art. Old Appellations of Numbers.

[264] Penny Cyclopædia, art. Mean.

[265] Jevons, Journal of the Statistical Society, June 1865, vol. xxviii, p. 296.

[266] Letters on the Theory of Probabilities, transl. by Downes, Part ii.

[267] Herschel’s Essays, &c. pp. 404, 405.