VI CONTENTS. 



Nunil)er 4. 



Page 



Art. XVIII. — Determinate Orbital Stability: its Mechanism 

 and some of its Functions in Celestial Mechanics; by F. 

 B. Taylor 295 



Art. XIX. — Paleobotany and the Earth's Early History; 



by A. P. Coleman 315 



Art. XX. — Evolution of Geologic Climates ; by C. Schuchert 320 



Art. XXI. — The American Bothriodonts'; by E. L. Troxell 325 



Art. XXII. — Pala^olagus, an Extinct Hare; by E. L. 



Troxell 340 



Art. XXIII. — White Mountain Physiography; by A. C. 



Lane 349 



Art. XXIV. — An Alkali Gneiss from the Pre-Cambrian of 



ISTew Jersey; by N. E. A. Hinds 355 



SCIENTIFIC INTELLTGENCR. 



Chemistry and FJii/sics — The Double Decomposition of Salts in Connectiou with 

 the Phase Rule, E. Rengade. 364. — A Comparison of the Atoinic Weights 

 of Terrestrial and Meteoric Nickel, G. P. Baxter and L. W. Parsons : 

 General and Industrial Organic Chemistry (F. Molinari), T. H. Pope, 

 365.— A Treatise on Chemistry, Roscoe and Schorlemmer : Musical Sands, 

 C. Carus-Wilson, 306. — Tlie Electric Fi;rnace, H. Moissan : Lessons in 

 Heat, W. S. Franklin and B. McNutt. 367.— Matter and Motion, J. C. 

 Maxwell: Mechanical Sciences Tripos: A Text Book of Physics, W. 

 Watson, 368. 



Geology — Crinoidea Flexibilia, F. Springer, 369. — Dnnkard Series of Ohio, 

 Stauffer and Schroyer, 371. — The Stratigraphy and Paleontology of 

 Toronto and Vicinity. Part I, The Peleeypoda, B. H. Stewart : Notes on 

 the Geology and Oil Possibilities of the northern Diablo Plateau in Texas, 

 J. W. Beede : The Weno and Pawpaw Formations of the Texas Comanch- 

 ean, W, S Adkins, and On a new Ammonite Fauna of the Lower Turon- 

 ian of Mexico, E. Bose : Fossil Corals from Central America. Cuba, and 

 Porto Rico, with an account of the American Tertiary, Pleistocene, and 

 Recent Coral Reefs, T. W. Vaughan, 372. — Studies in Minor Folds, C. 

 E. Decker: Lithologic Subsurface Correlation in the "Bend Seiies " of 

 North-Central Texas, M. I. Goldman : The Hadrosaar Edmontosaurus 

 from the Upper Cretaceous of Alberta, L. M. Lambe, 374. — The Nomen- 

 clatiire of Petrology, A. Holmes, 875. 



Miscellaneous Scientific Intelligence — Carnegie Institution of Washington, R. 

 S. Woodward, 375.— Collected Fruits of Occult Teaching, A. P. Sinnett : 

 Spiritualism — Its Present Day Meaning, a Symposium, H. Carter, 376. — 

 Types of Mental Deficiency, M. W. Barr and E. F. Maloney : Practical 

 Bank Operation, L. H. Langston, 378. — First Pan Pacific Scientific Con- 

 ference, Honolulu, Hawaii, Aug. 20, 1920, Part I, Organization, Proceed- 

 ings, Resolutions, 379. — The Origin of Man and of his Superstitions, C. 

 Read, 380. 



Obituary— S. W. Burnham : C. H. Fernald : I. A. Field : F. J. V. Skiff : 

 A. G. Nathorst: T; Miyake : J. C. Cain : C. Toldt, 380. 



