Published, with deletions, as 7.36-48. The manuscript was published in The Hound and Horn 2 (April-June, 1929) 267-282. Omitted from Collected Papers were pp. 8-22 (for a partial description of which see 7.40n15) and pp. 32-33 (the completion of a personal anecdote). Nature of pure science: questions of pure science handled differently from practical questions. For practical matters cultivate instincts! (Anecdote told in support of this advice.) Decimal and secundal systems of enumeration.
Autobiographical references, Decimal system, Enumeration, Guessing, Instinct, Logic (modal see Modality), Science, Secundal system of enumeration
pp. 1-35 plus pp. 2-16 of an earlier draft and 3 pp. of variants