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Petrographic methods, the authorized English translation of Part I, Anleitung zum Gebrauch des Polarisationsmikroskops (3d. rev. ed.) and Part II, Die gesteinbildenden Mineralien (2d. rev. ed.) (1912)

Weinschenk, Ernst, 1865-1921, Clark, Robert Watson, b. 1884 · New York [etc] McGraw-Hill book company · leaf 90

An illustration from Petrographic methods, the authorized English translation of Part I, Anleitung zum Gebrauch des Polarisationsmikroskops (3d. rev. ed.) and Part II, Die gesteinbildenden Mineralien (2d. rev. ed.), 1912, leaf 90
-Q Q … Q- p FIG. 87.Vibration Directions in Crystal Oblique to Those of the Nicols. Gray interference colors of the lowest order (see Fig. 96, page 75), corre-sponding to the lowest degrees of double refraction, are extremely difficultto distinguish from total darkness. Therefore, when thin sections of…

Mineralogy · Petrology · Microscopy

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More pictures from Petrographic methods, the authorized English translation of Part I, Anleitung zum Gebrauch des Polarisationsmikroskops (3d. rev. ed.) and Part II, Die gesteinbildenden Mineralien (2d. rev. ed.)

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