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Published online by Cambridge University Press: 14 March 2018
During a recent visit to Cornwall the attention of Professor Lewis was directed by Mr. James Wickctt to some composite crystals of copper pyrites recently found in one of the deep mines in the neighbourhood of Redruth. On the specimens acquired by the Cambridge Museum about thirty crystals show this composite growth, which causes the crystals to resemble ill-developed pentagonal dodecahedra of iron pyrites.
page 317 note 1 A Voyage of Discovery and Re.qearch in the Southern and Antarctic Regions during the years 1839-43. London, John Murray, 1849.
page 318 note 1 The Cruise of the "Falcon." London, Sampson Low, &c., 1887. The Cruise oj the "Alert." London, Longmans, Green & Co., 1890.
page 318 note 2 The phonolite Peak of Fernando Noronha was originally described as of granite (Quart. Journ. Geol. Soc. xlii, 1872, p. 43).
page 320 note 1 Am, J. Sci. XXXVII, 1889, p-185,
page 323 note 1 Am. J. Sci. XXXII 1889, p. 146.
page 330 note 1 Mr. Hudson's formulae are given in the Mineralogical Magazine, XII, p. 345, 1900,
