
Author's Preface
On the Study and Difficulties of Mathematics (1831)
Source: Preface to Recreations in Mathematics and Natural Philosophy. (1803), p. vi; As cited in: Tobias George Smollett. The Critical Review: Or, Annals of Literature http://books.google.com/books?id=T8APAAAAQAAJ&pg=PA412, Volume 38, (1803), p. 412
Author's Preface
On the Study and Difficulties of Mathematics (1831)
Implosion Magazine, No. 35, p. 16 (Callum Coats: Energy Evolution (2000))
Implosion Magazine
John Hicks (1979), quoted in: Nitasha Kaul (2007) Imagining Economics Otherwise. p. 76
Source: 1880s, Incidents and Anecdotes of the Civil War (1885), p. 320
"Sense and Sensibility"
The Common Sense of Science (1951)
As quoted in The Century: A Popular Quarterly (1874) ed. Richard Watson Gilder, Vol. 7, pp. 508-509, https://books.google.com/books?id=ceYGAQAAIAAJ&pg=PA508 "Relations of Mathematics to Physics". Earlier quote without citation in Nature, Volume 8 (1873), page 450.
Also quoted partially in Michael Grossman and Robert Katz, Calculus http://babel.hathitrust.org/cgi/mb?a=listis;c=216746186|Non-Newtonian (1972) p. iv. ISBN 0912938013.
Historical Introduction, p.17
Diophantos of Alexandria: A Study in the History of Greek Algebra (1885)
William Hazlitt Lectures on the English Poets (Philadelphia: Thomas Dobson, 1818) p. 243.
Criticism
Source: 1860s, Evidence as to Man's Place in Nature (1863), Ch.2, p. 125