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Revision as of 17:16, 16 December 2006 by Godshawl (Talk | contribs) (Calcite and doubling)

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"Calcite is transparent to opaque and may occasionally show phosphorescence or fluorescence. It is perhaps best known because of its power to produce strong double refraction of light, such that objects viewed through a clear piece of calcite appear doubled in all of their parts - a phenomenon first described by Rasmus Bartholin. A beautifully transparent variety used for optical purposes comes from Iceland, called Iceland spar." (2005 Andrew Alden, licensed to About.com, Inc.) Now note all the doubles in the errata: p. 87, line 12 has a doubled "be"; page 92, line 15 has a doubled "what"; page 334, line 19 has a doubled "of"; p. 552, line 22 has a doubled "be"; and so on. It looks to me as if the doubled words are part of the calcite motif. Godshawl 17:16, 16 December 2006 (PST)

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