CONTENTS. Vil 



Number 263. 



Page. 



Art. XLIV.— Unity of the Glacial Epoch ; by G. F. Weight 351 

 XLV. — A Photographic Method of Mapping the Magnetic 



.Field; by C. B. Thwing 374 



XLVI. — Contributions to Mineralogy, No. 54; by F. A. 



Gknth. With Crystallograpldc Notes; by S. L. Peist- 



eield ... 381 



XLVIL— The Effects of Self-induction arid Distributed 



Static Capacity in a Conductor; by F. Bedell and A. 



C. Crehore 389 



XLYIII. — The Quantitative Determination of Rubidium by 



the Spectroscope ; by F. A. Gooch and J. I. Phinney 392 

 XLIX.— Notes on the Farmington, Washington County, 



Kansas, Meteorite ; by H. L. Preston 400 



L. — A Note on the Cretaceous of Northwestern Montana ; 



by H. Wood 401 



LI. — The Deep Artesian Boring at Galveston, Texas; by 



R. T. Hill 406 



LII. — Notice of a new Lower Oriskany Fauna in Columbia 

 County, New York ; by C. E. Beecher. With an an- 

 notated list of fossils ; by J. M. Clarke . 410 



LIII. — Description of the Mt. Joy Meteorite; by E. E. 



Howell 415 



LIV. — Influence of the Concentration of the Ions on the In- 

 tensity of Color of Solutions of Salts in Water ; by C. 



E. LlNEBARGER 416 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Relative Densities of Hydrogen and Oxygen, Rayleigh, 

 418. — Properties of liquid Oxygen and liquid Air. Dewar, 419. — Industrial 

 production of Liquid Carbon dioxide, Troost: Oxidation of Nitrogen by the 

 Spark, Lepel: Inorganic synthesis of Azoimide, Wislicenus, 421. — Metallic 

 Carbonyls, L. Mond, 422. — Rapid Electrical Oscillations, Toepler: Electricity 

 of Waterfalls, Ph. Lenaed: Photography of Color, H. W. Vogel, 423. — Elec- 

 trical Resistance of Allotropic Silver, A. Overbeck: Relation between Mag- 

 netic and Earth Current Phenomena, W. Ellis, 424. — Physics, advanced course, 

 G. P: Barker, 426. 



Geology and Mineralogy— Geological Survey of Texas, E. T. Dctmble: Geological 

 Survey of Alabama, E. A. Smith, 427. — Annual Report of the Arkansas Geo- 

 logical Survey for 1892, R. A. F. Penrose: Osteology of Poebrotherium, W. 

 B. Scott: Palseaspis of Claypole, 428. — Devonian fossils from the Islands and 

 vicinity of Lakes Manitoba and Winnepegosis, J. F. Whiteaves: The Eruptive 

 Rocks of Electric Peak and Sepulchre Mt., Yellowstone Nat. Park, J. P. Iddings: 

 Mittheilungen der Grossh. Badischen Landesanstalt, A. Sauer, 429. — Danalite 

 from Cornwall : Mineral Resources of the United States, 430. 



Temperature of the Circumpolar region, 430. 



