EISE OF PETROLOGY AS A SCIENCE 265 



Bibliography. 



1 W. Cross, Jour. Geology, 10, 451, 1902. 

 1 Ibid., p. 45. 



8 Sorby, Quart. Jour. Geol. Soc., 14, 453, 1858. 



4 Zirkel, Einfiihrung des Mikroskops in das mineralogisch-geologische 

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6 Williams, G. H., Modern Petrography, 1886. 



" Zirkel, Mikroskopische Beschaffenheit der Mineralien und Gesteine. 



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8 Zirkel, Mikroskopische Gesteinstudien, Sitzung vom 12 Marz, 1863. 

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10 Dana, E. S., the Journal, 8, 390-392, 1874. 



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13 Dana, E. S., Igneous Eocks in the Judith Mts. Eep. of Reconnaissance 

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15 Hawes, G. W., the Journal, 21, 21-32, 1881. 

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17 The references for the papers alluded to, all of them in the Journal, 

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Emerson, 24, 195-202, 270-278, 349-359, 1882; 

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Cross, 27, 94-96, 1884; 31, 432-438, 1886; 39, 359-370, 1890; 41, 466- 

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Iddings, 26, 222-235, 1883; 



, 27, 453-463, 1884; 



, 36, 208-221, 1888; 



, 33, 36-45, 1887. 



Williams, 31, 26-41, 1886; 33, 135-144, 191-199, 1887; 35, 433-448, 

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, 34, 137-145, 1887. 



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, 33, 45-50, 1887. 



Irving (26, 27-32, 321-322, 27, 130-134, 1883; 29, 358-359, 1885). 



Kemp (35, 331-332, 1888; 36, 247-253, 1888; 38, 130-134, 1889). 



8 Zirkel, Lehrbuch der Petrographie, 2d ed., 1893. 



"Hunter and Eosenbusch, Ueber Monchiquit, etc., Min. petr. Mitth., 11, 

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Biddings, Origin of Igneous Eocks, Bull. Phil, Soc. Washington, 12, 

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^Brogger, Mineralien der Syenit-pegmatit-gange, etc., Zs. Kryst., 16, 



, Basic Eruptive Eocks of Gran, Quart. Jour. Geol. Soc., 50, 



15, 1894; Grorudit-Tinguait-Serie, Vidensk. Skrift. 1 Math. nat. Kl., No. 

 4, 1894. 



