238 L. V. Pirsson — Rise of Petrology as a Science. 



Bibliography. 



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



2 Ibid., p. 45. 



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



4 Zirkel, Einfiihrung des Mikroskops in das mineralogisch-geologische 

 Studium, 1881. 



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



6 Zirkel, Mikroskopische Beschaffenheit der Mineralien und Gesteine. 



7 Eosenbusch, Mikroskopische Physiographic der petrographisch wichtigen 

 Mineralien. 



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



9 Julien and Wright, Geol. Surv. of Michigan, 2, 1873. Appendices A 

 and C. 



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



11 Zirkel, Geological Exploration of the 40th Parallel ; vol. VI, Micro- 

 scopical Petrography. 



12 Caswell, Microscopical Petrography of the Black Hills. U. S. Geog. 

 and Geol. Surv. Eocky Mts. Eep. on Black Hills of Dakota, 469-527. The 

 separate copies issued bear the imprint 1876; the complete report 1880. 



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

 Carroll, Mont., to Yellowstone Park in 1875. Col. Wm. Ludlow, War 

 Dept., Washington, 105-106. 



14 Hawes, G. W., Eocks of the Chlorite Formation, etc., this Journal, 11, 

 122-126, 1876. Greenstones of New Hampshire, etc., ibid., 12, 129-137, 

 1876. 



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



16 Brogger, Die silurischen Etagen 2 und 3, Kristiania, 1882. 



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

 are as follows: 



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



, 23, 302-308, 1882. 



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

 475, 1891; 23, 452-458, 1882. 



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, 

 1888; 36, 254-259, 1888. 



, 34, 137-145, 1887. 



Diller, 32, 121-125, 1886; 37, 219-220, 1889; 



, 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). 



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



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

 445, 1890. Eosenbusch, Ueber Struetur und Class, der Eruptivgesteine, 

 ibid., 12, 351, 1891. 



20 Iddings, Origin of Igneous Eocks, Bull. Phil, Soc. Washington, 12, 

 89-213, 1892. 



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

 1890. 



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



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

 4, 1894. 



23 Weed and Pirsson, e.g. Shonkin Sag, this Journal, 12, 1-17, 1901. 



24 The references for the articles mentioned (all in the Journal) are as 

 follows : 



Becker, 46, 1893; 4, 257, 1897; 3, 21-40, 1897. 

 Cross, 39, 657-661, 1915. 



Adams, 22, 95-123, 1906; 29, 465-487, 1910. 

 Daly, 22, 195-216, 1906; 26, 17-50, 1908. 



