File:Papers and proceedings of the Royal Society of Tasmania (1898) (14586280398).jpg

Identifier: papersproceeding18981901roya (find matches)
Title: Papers and proceedings of the Royal Society of Tasmania
Year: 1863 (1860s)
Authors: Royal Society of Tasmania
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Publisher: Hobart, Tasmania, Royal Society of Tasmania
Contributing Library: Smithsonian Institution Libraries
Digitizing Sponsor: Biodiversity Heritage Library

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glimmercommon to this class of meteoric substances. In shape * Introduction to the Study of Meteorites. (British Museum, 1896.)f The discovery of undoubted diamonds in the numerous masses of meteoric iron found in the Canyon Diable, America, was announced in the American Journal of Science, July, 1891. 50 METEOEITE FROM CASTRAY RIVER. it is elongably quadrate, tapering, and abruptly angu-lated at one end ; it is longitudinally furrowed, and hasseveral irregular pittings or diminutive thumb-marks on the respective surfaces. It is strongly magnetic. Itwas originally obtained, with two others of like size andcharacter, by a miner, in 1899, when ground-sluicing theauriferous drift on the banks of the Castray River, andafterwards, direct from the discoverer, came into thepossession of Mr. T. Birkett, a well-known mine manager,by whom it was presented to the mineral collection ofthe writer. I have to thank Mr. W. H. Twelvetrees, GovernmentGeologist, for illustrating this interesting object.
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FETTERDITE. DESCRIPTION AND ANALYSIS OF A NEWSPECIES OF MINERAL, PETTERDITE,A NEW OXYCHLORTDE OF LEAD. By W. H. Twelvetrees. —^♦- - This apparently absolutely new chemical combinationoccurs in attached crystal groups in a quartz ganguecontaining disseminated pyrites, in the form of somewhatthin hexagonal plates, which are usually minute in size(about 5 millemetres iu diameter), but occasionally reach9 mm. dia., and, still more rarely, a larger size. Macles are not rare, irregularly attached and implantedon each other, and on the matrix. Fracture:—Rather irregular, brittle and dull.Colour:—White, passing to pale grey on the surface.Streak :—White.Lustre:—Dull, inclined to rough, waxy, opaque,, shining on the edges of the crystals.Hardness :—15 to 2.6rrau% ; —7-16, determined by Mr. W. F, Ward, Government Analyst.Before blowpipe:— On coal OF. forms white to yellow mass. RF. a bead of metallic lead is easily produced without fluxes.Heated in forceps, strongly decrepitat

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