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Art. XLIY.— Unity of tin- Glacial Epoch ; by G. F. Weight 351 



XLY. — A Photographic Method of Mapping the Magnetic 



Field; by 0. 15; Thwing -'.,. 374 



XLYI. — Contributions t<» Mineralogy, /No. 54; by F. A. 

 Gkntii. With Crystallo.gra.phic Notes; by S. L. Pen- 

 field '. 381 



XLVIL— The Effects of Self-induction and Distributed 

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

 C. Chehokk _"_•__ .. . .■ 389 



XLYIIL — The Quantitative .Determination of Rubidium by 



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



XLIX — Notes On the Harmington, Washington County, 



Kansas, Meteorite; by II. L. Preston. 400 



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



by H. Wood , _:.■_' 401 



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



R. T. Hill ._• ........ 406 



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

 County, New Y<>rk; by C. E. Beech kr. With an an- 

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



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



Howell .'. .'._. 415 



LIY. — Influence ol the Concentration of the Ions on the In- 

 tensity ot 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. Pewar, 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. Lenakd: Photography of Color, H. W. Vogel, 423. — Elec- 

 trical Resistance of Ulotropic Silver, A.. Ovekbeck: Relation between Mag- 

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



' G. F. Barker, 426. 



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

 Survey of Alabama, E. A. Smith. 4 27. — Annual Report of the Arkansas Geo- 

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

 B. Scott: Palaeaspis of Claypole, 42s. — Devonian fossils from the Islands and 

 vicinity of Lakes Manitoba and U'innepegosis. J. F. Whiteaves: The Eruptive 

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

 Mittheilungen der Grossh. Badisrhen Landesanstalt. A. Safer, 429. — Danalite 

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



Temperature of the Circumpolar region, 430. 



