Abstract
A FEW weeks ago, while examining under the microscope a piece of glass on which a coarse scratch had been made by a file, in order to serve as a focussing mark in the, determination of refractive index, I noticed a number of narrow, somewhat faintly coloured spectra running along both sides of the scratch. As I can find no account of such an appearance, and an examination of it seemed to throw a little light on the effects of a combined tangential stress and pressure on a brittle medium such as glass, I thought a short description of the phenomena might be interesting to the readers of NATURE.
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LOVE, E. Spectra Produced in Glass by Scratching. Nature 32, 270–271 (1885). https://doi.org/10.1038/032270a0
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DOI: https://doi.org/10.1038/032270a0
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