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(1) The crystal-habit of Topaz from New Brunswick, Canada. (2) A method of silvering crystal-faces for giving improved reflections on the goniometer

Published online by Cambridge University Press:  14 March 2018

H. V. Ellsworth
H. V. Ellsworth*
Affiliation:
Department of Mineralogy, University of Toronto, Canada
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Extract

It is only recently that the mineral topaz has been found in any considerable quantity in Canada. Previous to the discovery of the topaz of York County, New Brunswick, in 1911, it was distinctly a rarity among Canadian minerals and had never been found crystallized in any Canadian locality. The above-mentioned district, however, has yielded both the massive and crystallized varieties in fair abundance and some fairly perfect crystals have been obtained for measurement.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 17 , Issue 78 , December 1913 , pp. 39 - 45
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1913

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References

page 39 note 1 Report of the Geological Survey of Canada, 1887-8, vol. iii, p. 66 S.

page 39 note 2 Report of the Geological Survey of Canada, 1896, vol. ix, p. 18 R.

page 40 note 1 Twentieth Report of the Ontario Bureau oF Mines, 1911, p. 155.

page 40 note 2 Summary Report of the Mines Branch, Ottawa, 1910, p. 65. Also, Economic Geology, 1911, vol. vi, p. 396.

page 40 note 3 Canadian Mining Journal, No. 17, Sept. 1, 1911 ; reprinted in Summary Beport Geological Survey of Canada, 1911, p. 13.

page 44 note 1 Astrophysical Journal, 1895, vol. i, p. 252. The writer is indebted to Prof. Chant of the Department of Astro-Physics for a reference to a very comprehensive review of the various modern silvering methods, including Brashear's process, by H. D. Curtis in the ‘Publications of the Astronomical Society of the Pacific,’ San Francisco, 1911, vol. xxiii, No. 185.