CONTENTS. 



Page 

 Art. XIV. — John Day Promerycochoeri, with Descriptions 

 of Five New Species and One New Subgenus ; by M. R. 

 Thorpe 215 



Art. XV. — Episodes in Rocky Mountain Orogeny; by C. L. 



Dake 245 



Art. XVI. — Relations of Subjacent Igneous Invasion to Re- 

 gional Metamorphism (concluded); by J. Barrell 255 



Art. XVII. — The Post-Glacial Terraces of Anticosti Island; 



by W. H. TwENHOFEL and W. H. Cokine , . 268 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Devitrification of Glass, A. F. O. Germann : A Substi- 

 tute for Thoulet's Solution, A. Thiel and L, Stoll : Priestley in America, 

 1794-1804, E. F, Smith, 279.— Introduction to General Chemistry (H. 

 Copaux), H. Leffmann : A Text-Book of Organic Chemistry, E. DeB. 

 Barnett : Comparison between wave lengths of solar and of terrestrial 

 origin, A. Perot, 280. — The Imaginary in Geometry, J. L. S. Hatton : 

 The Principles of the Phase Theory, D. A. Clibbens : Lessons in Mechanics, 

 W. S. Franklin and B. MacNutt, 281.— Lessons in Electricity and Mag- 

 netism, W. S. Franklin and B. MacNdtt, 282. — Die Stellung derRelativ- 

 itatstheorie in der geistigen Entwicklung der Menschheit, J. Petzoldt, 

 283. 



Geology — The Earth's Axes and Triangulation, J. de G. Hunter, 283. — Inves- 

 tigations of Isostasy in Himalayan and Neighbouring Regions, S. G. Bur- 

 RARD, 285. — Connecticut Geological and Natural History Survey, F. Ward, 

 etc., 286. — The Erosional History of the Driftless Area, A. C. Trowbridge: 

 Geological Survey of Western Australia, A. G. Maitland, 287. — Tenth 

 Annual Report of the Director of the Bureau of Mines, for the fiscal year 

 ending June 30, 1920, F. G. Cottrell, 288. 



Miscellaneous Scientific Intelligence — The System of Animate Nature, J. A. 

 Thomson, 288. — Mechanismus und Physiologic der Geschlechtlaestim- 

 mung, R. GoLDSCHMiDT, 289. — Biology, General and Medical, J. McFar- 

 LAND : An Introduction to the Study of Cytology, L. Doncaster, 290. — 

 A Laboratory Manual of Invertebrate Zoology, G. A. Drew : Considera- 

 tions sur I'Etre Vivant, C. Janet : Collection les Maitres de la Pensee 

 Scientifique : Practical Bacteriology, Blood Work and Animal Parasitol- 

 ogy, E. R. Stitt, 291. — Memoirs of "^ the Bernice Pauahi Bishop Museum of 

 Polynesian Ethnology and Natural History, A. Fornander : New Geo- 

 graphy, Book I, A. E. Frye : Memoirs of the Queensland Museum, H. A. 

 Longman : Transactions and Proceedings of the New Zealand Institute, 

 Wellington, N. Z. : The National Academy of Sciences, 292. — Observatory 

 Publications: A Laboratory Manual of Anthropometry, H. H. Wilder, 293. 



Obituary — W. T. Sedgwick : L. Fletcher : L. W. Riddle : A. Muirhead : 

 F. HoussAY, 294. 



