CONTENTS. V 



Number 171. 



Page 

 Art. XIV. — Armor of Stegosaurns ; by Richard S. Lull.. 201 

 XV. — Times of Fall of Meteorites ; by O. C. Farringtox. 211 

 XVI. — Note on the Occurrence of Astrophyllite in the 



Granite at Quincy, Mass. ; by L. V. Pirsson 215 



XVII. — Crystallization of a Basaltic Magma from" the 



Standpoint of Physical Chemistry; by C. N. Fknnek.. 217 

 XVIII. — Notes on Goethite ; by V. Goldscumidt and A. L. 



Parsons 235 



XIX. — Velocities of Certain Reactions between Metals and 



Dissolved Halogens ; by R. G. Van Name and G. 



Edgar 237 



XX. — New Cretaceous Bauhinia from Alabama; by E. W. 



Berry _• .. . 256 



XXI. — Anhydrite and Associated Minerals from the Salt 



Mines of Central Kansas ; by A. F. Rogers __ 258 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Purple Dye of the Ancients, P. Friedlaender, 

 262. — Purification of Water Supplies by the use of Hypochlorites, W. P. 

 Mason : Allen's Commercial Organic Analyses, H. Leffmann and W. A. 

 Davis, 263. — Introduction to Physical Chemistry, H. C. Jones: Change 

 from Positive Reflection to Negative through Pressure, O. Lummer and 

 K. Sorge : Study of Gaseous Suspensions, M. de Broglie : Constitution 

 of the Electric Spark, T. Royds : Cadmium Amalgams and the Weston 

 Normal Cell, F. E. Smith, 264. 



Geology and Natural History — Florida State Geological Survey, E. H. 

 Sellards, 265. — Report of Topographic and Geologic Survey Commission of 

 Pennsylvania, 1906-1908, 266. — Virginia Geological Survey, T. L. Watson : 

 Illinois State Geological Survey, H. F. Bain : Geology and Water 

 Resource's of the Northern Portion of the Black Hills and Adjoining 

 Regions in South Dakota and Wyoming, N. H. Darton, 267. — Biological 

 Survey of Michigan : An Ecological Survey of Isle Royale, Lake Superior, 

 C. C. Adams : The University Geological Survey of Kansas, E. Haworth, 

 268. — Das Antlitz der Erde, E. Sgess, 269. — Beitrage zur Flora der unteren 

 Kreide Quedlinburgs, Teil II ; Die Gattung Nathorstiaua P. Ri enter und 

 Cylindrites spongioides Goeppert, P. B. Richter : Cave Vertebrates of 

 America; a Study in Degenerative Evolution, C. B. Eigenmann, 270. — 

 Die Saugetierontogene.se in ihrer Bedeutung fur die Phylogenie der Wir- 

 beltiere, A. A. W. Hubrecht : Occurrence of Strepsicerine Antelopes in the 

 Tertiary of Northwestern Nevada, J. C. Merriam, 271. — Recherches Geo- 

 logiques et Petrographiques sur l'Oural du Norcl ; Le Bassin de la Haute 

 Wichera, L. Duparc : Laboratory Botany for the High School, W. N. 

 Clute, 272. 



Miscellaneous Scientific Intelligence — The Norwegian Aurora Polaris Expedi- 

 tion 1902-1903, 272.— Carnegie Institution of Washington, Eighth Year 

 Book : The Carnegie Foundation for the Advancement of Teaching. 

 Fourth Annual Report, H. S. Pritchett and T. M. Carnegie, 274. — 

 Relief Maps : Report of the Librarian of Congress and Report of the 

 Superintendent of the Library Building and Grounds, 275. — Harvard Col- 

 lege Observatory, E. C. Pickering, 276. 



Obituary — Iff. Serge Nikitin ; Dr. Shelford Bidwell, 276. 



