- Cf. Mackay, Proc. Edinb. Math. Soc., Vol. 11, 1893, p. 24; Casey's Sequel to Euclid, 6th ed., p. 66, exs. 30, 31.
- For example problems 2819 (1920, 134); 2827 (1920, 186); 2861 (1920, 428); 2868 (1920, 482).
- In his solution of problem 2691 (1919, 131) R. A. Johnson gives a simpler derivation of an equivalent result.
- W. A. Diesterweg, Geometrische Aufgaben nach der Methode der Griechen. Andere Sammlung. Elberfeld, 1828, pp. 172–173.
- Journal für die reine und augewandte Mathematik, vol. 35, p. 281.
- Archiv der Mathematik und Physik, vol. 15, 1850, pp. 238–239.
- C. M. Herbert seemed to regard the special case of this theorem for the square as new, in his articles in Annals of Mathematics, second series, vol. 16, 1914, pp. 42 and 67.
- Carnot, Géométrie de Position, pp. 374–377.
- Bulletin de l'acad. imp. d. sc. de St. Pétersbourg, vol. 7, 1864, cols. 177–181.
- P. G. Tait, “Note on Milner's lamp,” Proceedings of the Edinburgh Mathematical Society, vol. 5, 1887, pp. 97–98; Scientific Papers by Peter Guthrie Tait, vol. 1, 1900, pp. 215–216.
- A. Cayley, “On a differential equation and the construction of Milner's lamp,” Proceedings of the Edinburgh Mathematical Society, vol. 5, 1887, pp. 99–101; Collected Mathematical Papers of Arthur Cayley, vol. 13, 1897, pp. 3–5.
- This is an application of the article on “The Relation of Caustics to Certain Envelopes” printed above. The notation of the previous solution is here employed and the presentation is somewhat condensed.
The American Mathematical Monthly
Volume 28, 1921 - Issue 4