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The application of phase-contrast microscopy to mineralogy and petrology

Published online by Cambridge University Press:  14 March 2018

Frank Smithson
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Extract

Phase-contrast methods in microscopy appear to have been developed mainly with the intention of applying them to biological subjects, and their application to the examination of mineral substances has received only slight attention. Thin sections of rocks viewed under a phase-contrast microscope have a fascinatingly strange appearance and it does not take long to realize that some features are shown up more clearly and others less clearly than when viewed under an ordinary or a polarizing microscope. A considerable amount of work may be necessary before it is possible to assess the value of the new instrument for petrological purposes or to interpret all the phenomena observed by its aid. Nevertheless, it seems fitting to set out the following short account as a contribution towards this knowledge.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 28 , Issue 202 , September 1948 , pp. 384 - 391
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1948

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References

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page 390 note 1 The symbols used are based on those used by A. H. Bennett et al. (1946, loc. cit.). They use the letter A when the deviated light is partially suppressed and B when the undeviated light is partially suppressed. Numbers preceding A and B represent the ratio intensity of deviated light/intensity of undeviated light.