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Published online by Cambridge University Press: 03 November 2016
page 44 note * Nouv. Ann. de Math., 1866, p. 313.
page 44 note † Nouv. Ann. de Math., 1909, p. 66.
page 44 note ‡ Mathieu Weill, Nouvelles Annales, 1880, p. 253 ; W Gallatly, The moder geometry of the triangle, p. 79.