1916 'The organisation of thought'. Report of the 86th Meeting of the British Association for the Advancement of Science, pp. 355–65. Also published with slight differences in Proceedings of the Aristotelian Society, vol. 17, pp. 58–76.

1916 'Space, time, and relativity'. Proceedings of the Aristotelian Society, vol. 16, pp. 104–29.

1913 March. 'Presidential address to the London branch of the Mathematical Association'. Mathematical Gazette, vol. 7, pp. 87–94.

1913 'The principles of mathematics in relation to elementary teaching'. Proceedings of the Fifth International Congress of Mathematicians, vol. 2, pp. 449–54. Also published in L'Enseignment Mathematique.

1910 October. 'The philosophy of mathematics'. Science Progress in the Twentieth Century, vol. 5, pp. 234–9.

1910 (With Bertrand Russell) 'Non-Euclidean geometry'. Encyclopedia Britannica (11th edition), vol. 11, pp. 724–30.

1902 'On cardinal numbers'. American Journal of Mathematics, vol. 24, pp. 367–94.

1901 October. 'Memoir on the algebra of symbolic logic, part II'. American Journal of Mathematics, vol. 23(4), pp. 297–316.