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XV. On the Effects of Compression and Dilatation in altering the Polarising Structure of Doubly Refracting Crystals

Published online by Cambridge University Press:  17 January 2013

David Brewster
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Extract

In a paper which I had the honour of submitting to the Society, at the end of last session, I gave a detailed account of the effects of mechanical compression and dilatation, in communicating to glass and other uncrystallised bodies, all the properties of doubly refracting crystals. I had at that time attempted, without success, to alter the polarising structure of doubly refracting crystals, although I applied the force of powerful screws to Topaz, Rock-crystal, and Calcareous spar. All the specimens which I employed were crushed to pieces by the pressure, but exhibited no traces of the coloured rings when exposed to polarised light.

Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 8 , Issue 2 , 1818 , pp. 283 - 286
Copyright
Copyright © Royal Society of Edinburgh 1818

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