REPORT OF THE DIRECTOR IQ20-2I 151 



Preumont, G. F. J. J. & Howe, I. A. The Geology and Petrology of the 



Congo Free State. Quar. Jour. Geol. Soc., 61:641. 1905 

 Pumpelly, R. Geological Researches in China, Mongolia and Japan. Smithson. 



Contrib. no. 202. 1866 

 Quirke, T. T. Concerning the Process of Thrust-faulting. Jour. Geol., 28:417. 



1920 

 Ransome, F. L. Globe Folio, Arizona. U. S. Geol. Surv. Folio no. ill. 1904 



Bisbee Folio, Arizona, ibid. no. 112. 1904 



Geology of the Globe Copper District, Arizona. U. S. Geol. Surv. Prof. 



Paper, 12:24. 1903 



Reyer, E. Geologische und geographische Experimente. Heft 3, Leipzig. 1894 



Geologische Prinzipienfragen. Leipzig. 1907 



Richardson, G. R. Van Horn, Texas, Folio. U. S. Geol. Surv. Folio no. 194. 



1914 

 Richthofen, F. Freih. von. China, Ergebnisse eigener Reisen und darauf 



gegrundeter Studien. Berlin, pt 1, 1877. pt 11, 1882 

 Ruedemann, R. On some Fundamentals of Precambrian Paleogeography. 



Proc. Nat. Acad. Sci., 5:1. 1919 

 Schrader, F. C. Mineral Deposits of the Cerbat Range, Black Mountains, and 



Grand Wash Cliffs, Mohave County, Arizona. U. S. Geol. Surv. Bui., 397:29. 



1909 

 Schuchert, C. Paleogeography of North America. Bui. Geol. Soc. Amer., 

 • 20:427. 1910 

 The Problem of Continental Fracturing and Diastrophism in Oceania. 



Amer. Jour. Sci., 42:91. 1916 



On Pre-Cambrian Nomenclature. Amer. Jour. Sci., 42:475. 1916 



The Earth's Changing Surface and Climate during Geologic Time; in 



The Evolution of the Earth and its Inhabitants. New Haven. 1918 



Paleozoic Crustal Instability in Eastern North America. Amer. Jour. 



Sci., 50:399. 1920 

 Sederholm, J. J. Les roches prequaternaires de la Fennoscandia. Pamp. 



11, Geol. Congr. 19 10, p. 10 

 Smith, W. D. & Packard, E. L. Salient Features of the Geology of Oregon. 



Jour. Geol., 27:107. 1919 

 Stille, H. Zonares Wandern der Gebirgsbildung, Jahresb, d. niedersachs. geol. 



Vereins. 2:34. 1909* 

 Suess, E. Das Antlitz der Erde, v. 1-3, Prag und Leipzig. 1885-1909. 



(English transl. by Hertha B. C. Sollas, Oxford) 



Synthesis of the Paleogeography of North America. Amer. Jour. Sci., 



31:101. 1911 



Bau und Bild der bohmischen Masse. Wien. 1903 



Tammann, G. Kristallisieren und Schmelzen. Leipzig. 1903 



Taylor, W. G. On the crumbling of the earth's crust. Amer. Jour. Sci., 



30:259. 1885 

 Tilley, C. E. The Metamorphism of the Precambrian Dolomites of Southern 



Eyre Peninsula, South Australia. Geol. Mag., 57:449. 1920 

 Tornau, F. Die nutzbaren Mineralvorkommen, insbesondere die Goldlager- 



statten Deutsch-Ostafrikas. Zsitschr. d. d. geol. Gesellsch. 59:60. 1907 



* Other important papers by Professor Stille came to hand too late to be used. 



