The principles of science

by William Stanley Jevons

[68] Pure Logic, pp 76, 77.

[69] Pure Logic, p. 65. See also the criticism of this point by De Morgan in the Athenæum, No. 1892, 30th January, 1864; p. 155.

[70] Boole’s Laws of Thought, p. 106. Jevons’ Pure Logic, p. 69.

[71] On the Syllogism, No. iii. p. 12. Camb. Phil. Trans. vol. x, part i.

[72] See Horsley, Philosophical Transactions, 1772; vol. lxii. p. 327. Montucla, Histoire des Mathematiques, vol. i. p. 239. Penny Cyclopædia, article “Eratosthenes.”

[73] Euclid, Book x. Prop. 117.

[74] Philosophical Magazine, December 1852; Fourth Series, vol. iv. p. 435, “On Indirect Demonstration.”

[75] Philosophical Magazine, Dec. 1852; p. 437.

[76] Mind; a Quarterly Review of Psychology and Philosophy; October, 1876, vol. i. p. 487.

[77] Whewell, History of the Inductive Sciences, vol. i. p. 222.