VUl CONTENTS. 



Number 180. 



Page 

 Art. XXXIX. — Steafosauras ungulatus Marsh, recently 



momited at the Peabody Museum of Yale University ; 



byR. S. Lull. (With Plate II) 361 



XL. — Use of Metallic Potassium in Determining Halogens 



in Benzol Derivatives; by C. 11. Maryott 378 



XLl. — New Genus of Peccaries ; by F. B. LooMis 381 



XLII. — Geology and Topography of the Serra de Jacobina, 



State of Bahia, Brazil ; by J. C. Branner 385 



XLIII. — Indirect Method for Determining Columbium and 



Tantalum ; by II. W. Footb and R. W. Langley 393 



XLIV. — Note on a Recent Method for Separating Tantalum 



and Columbium; by H. W. Foote and R. W. Langley 401 

 XLV. — Symmetric Arrangement in the Elements of the Pale- 

 ozoic Platform of North America ; by R. Ruedemann 403 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Behavior of Metallic Copper towards Gases, SiE- 

 VERTS and Krtjmbhaar : Diffusion of Crude Petroleum through Fuller's 

 Earth. Gilpin and Bransky, 412. — Vacuum-tight Seals between Iron and 

 Glass, H. J. S. Sand : Structure of Meteoric Alloys, W. Guertler : Lique- 

 faction of Helium, H. K. Ounes, 413. — Photoelectric Fatigue, H. S. 

 Allen : New Eadiant Emission from the Spark, R. W. Wood : Steriliza- 

 tion by Ultra- Violet Rays, B. Daguerre, 414. — International Congress 

 of Radiology and Electricity, B. B. Boltwood, 415. 



Geology and Natural History — Publications of the United States Geological 

 Survey, 417. —Federal Bureau of Mines, J. A. Holmes: Olenellus and 

 other Genera of the Mesouacidse, C. D. Walcott, 419. — Bellerophonkalke 

 von Oberkrain und ihre Brachiopodenfauna, F. Kossmat and C. Diener, 

 420. — Phylogeny of the Felida, W. D. Mattbew, 431.— Beaked Whales of 

 the family Ziphiidae in the United States National Museum, F. W. True : 

 Eesurvey of the Maryland-Pennsylvania Boundary part of the Mason and 

 Dixon Line, 422. — Maryland Geological Survey, W. B. Clark: Report of 

 the Conservation Commission of Maryland for 1908-1909 : Preliminary 

 Report on the Geology of the Monarch Mining District, Chaffee County, 

 Col., R. D. Crawford : Geology of the Grayback Mining District, Costilla 

 County, Col., 423 — Erdbeben ; Eine Einfiihrung in die Erdbebenkunde, 

 W. H. HOBBS : Variations Periodiques des Glaciers, E. Brijckner et E. 

 Muret : Etudes Glaciologiques, Tirol Autrichien, Massif des Grand 

 Rousses, 424. — Beitrage zur Geologic der Samoainseln, I. Freidlander : 

 Artificial Lava Flow and its Spherulitic Crystallization, 425. — Economic 

 Geology, H. Ries, 426. — Ore Deposits of New Mexico ; Meteor Crater in 

 Northern Central Arizona, D. M. Barringer, 427. 



Miscellaneous Scientific Intelligence — National Academy of Sciences ; Plant 

 Life of Maryland : International Institute of Vulcanology at Naples ; 

 Studies in Spiritism, A. E. Tanner, 430. 



Obituary. — William Henry Brewer, David P. Penhallow, Otto Lue- 



DECKE, 431. 



