CONTENTS. 



Page 

 Art. XXV". — Post-Glacial Warping of Newfoundland and 



Nova Scotia ; by R. A. Daly 381 



Art. XXVI. — New Camels in the Marsh Collection; bv R. 



S. Lull ' 392 



Art. XXVII. — Leptauchenia Leidy and Cyclopidius (Pithe- 



cistes) Cope, etc. ; by M. R. Thorpe 405 



Art, XXVIII. — A Potamogeton from the Upper Cretaceous; 



by E. W. Berry 420 



Art. XXIX. — Additional Notes on the Crystallography and 



Composition of Boulangerite; by E. V. Shannon 423 



Art. XXX. — The Oriskany Sandstone Faunule at Oriskany 



Falls, New ^ork: by H. N. Eaton ■ 427 



Art. XXXI. — Two Petrified Palms from Interior North 



America ; by N. E. Stevens 431 



Art. XXXII. — The Isomorphic Relations of the Sulphosalts 



of Lead, Silver and Copper ; by W. F. Foshag 444 



Art. XXXIII. — The Occurrence of Calcareous Sandstone 



in the Recent Delta of Eraser River, British Colombia, 



Canada, by W. A. Johnston 447 



Art. XXXIV. — The Age of the Recent Delta of Eraser 



River, British Columbia, Canada; by W. A. Johnston 450 



SCIENTIFIC INTELLIGENCE 



Chemistry and Physics — Separation of Gallium from Indium and Zinc by Frac- 

 tional Crystallization of the Cfesium-Gallium Alum, P. E. Browning and 

 E, Porter, 453. — Text-Book of Practical Chemistry, (x. F. Hood and J. A. 

 Carpenter : Dictionary of Chemical Solubilities, Inorganic, A.#M. Comey 

 and D. A. Hahn. 45-i. — Inorganic Chemistry for Schools and Colleges, J. 

 L. Howfe : Luminous phenomena in the Lilienfeld tube, J. E. Lilienfeld 

 and F. Rother, 455. — Observations on Soaring Flight, E. H. Hankin, 

 456. — Elementary Calculus. W. F. Osgood: Space, Time and Gravitation, 

 A. S. Eddington. 457. — Principle of Relativity, H. VV, Carr, 458. 



Geology — Zur Alteren Geschiclite des Diskontinuitatsproblems i)i der Biogeo- 

 graphie, N. v. Hofsten : Recent Molluscs of Gult of Mexico, etc., C. J. 

 Maury, 459. — Brachiopoda Triydica, C. Diener : Cephalopoda Dibranch- 

 iata, E. v. Bulow-Trummer : Coal in Great Britain, W. Gibson: Mono- 

 graph of the British Ordovician and Silurian Belierophontacea, F. R. 0. 

 Reed, 460. — West Virgini.i Geological Survey, I. C. White. 461. 



Zoology and /?ofa»?/— Sanitary Entomology, W. D. Pierce, 461. — Embryology of 

 Chick: B. M. Patten: University of Iowa Studies in Natural History, C: C. 

 Nutting: Origin and Development, of Nervous System, C. M. Child, 462.— 

 The Cactaceae, N. L. Britton and J. N. Rose : Phytoplankton of the inland 

 lakes of Wisconsin, G. M. Smith, 463. — Introduction to Bacterial Diseases 

 in Plants, E. P. Smith: Textbook of Pastoral and Agricultural Botany, 

 J. W. Harshberger, 464. — Heredity and Kvolution in Plants, C. S. 

 Gager : Diseases of Economic Plants, F. L. Stevens : Nature-Study of 

 Plants, T. A. Dymes : Chemistry of Plant Life, R. W. Thatcher, 465. 



Miscellaneous Scienfijic Intelligence — A nnnai Report Carnegie Foundation, 

 H. S. Pritchett and R. A. Franks; National Academy of Sciences, 

 466.— Science News Bulletin: French -English Medical Dictionary: Labora- 

 tory Manual for Detection of Poisons and Powerful Drugs, 467. — Intro- 

 duction to Chemical Pharmacologv : New York State Income Tax 

 Procedure, 1921. 46«. 



