[257] Boyle, “Works,” London, 1744, vol. ii, p. 85. The experiments were made October 27, 1663, and the results were communicated to the Royal Society the next day, the diamond which had been used being shown to the members at that time.
[258] “Journal des Sçavans,” 1739, pp. 438, 439, of Amsterdam edition, citing “Hist. de l’Acad. Roy. des Sciences,” 1735 (vol. xxxviii).
[259] See Transactions of the New York Academy of Sciences, vol. xiv, p. 260; 1895.
[260] “Diamonds,” a lecture delivered before the British Association at Kimberley, Sept. 5, 1905; London, 1905, p. 37. See also the same author’s “Diamonds,” London and New York, 1909, pp. 96-101.
[261] Kunz, “Gems and Precious Stones of North America,” New York, 1890, pp. 183, 184.
[262] “Collection des anciens alchemistes grecs,” ed. by M. Berthelot, trans., p. 336-338; text pp. 351, 352, Paris, 1887, 1888.
[263] “Sur un procédé antique pour rendre les pierres précieuses et les vitrifications phosphorescentes,” Annales de Chimie et Physique, 6th ser., vol. xiv, pp. 429-432.
[264] Moryson, “An Itinerary containing his Ten Yeeres Travell through the Twelve Dominions,” etc., Glasgow, 1907-8, vol. i. p. 216.
[265] Burton, “Supplementary Nights,” London, 1886, vol. iii, p. 354, note.