On the Determination of the Optic Axes of a Crystal from Extinction-Angles

Harold Hilton

Professor of Mathematics in Bedford College (University of London)

Mineralogical Magazine; December 1921 v. 19; no. 95; p. 233-239; DOI: 10.1180/minmag.1921.019.95.02
© 1921, The Mineralogical Society
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