CON T E N T S . 



Page. 



Art. XXXI. — Distance of the Stars by Doppler's Principle ; 



by G. W. Colles, Jr. 259 



XXXII. — Double Halides of Tellurium with Potassium, Ru- 

 bidium and Csesium; by H. L. Wheeler 267 



XXXIII. — Tungstous Oxide — a new Oxide of Tungsten — 



associated with Columbous Oxide; by W. P. Heapden 280 

 XXXIV. — Sodalite-Syenite and other Rocks from Montana; 



by W. Lustdgren, with Analyses by W. H. Melville.. 286 

 XXXV. — A Basic Dike near Hamburg, Sussex Co., New 



Jersey, which has been thought to contain Leucite; by 



J. F. Kemp 298 



XXXVI. — Underthrust Folds and Faults; by E. A. Smith. 305 

 XXXVII. — The Cretaceous Formations of Mexico and their 



Relations to North American Geographic Development ; 



by R. T. Hill '_ 301 



XXXVIII. — Electrical Oscillations of Low Frequency and 



their Resonance; by M. I. Pupin 325 



XXXIX. — Determination of Iodine in Haloid Salts by the 



Action of Arsenic Acid ; by F. A. Gooch and P. E. 



Browning 334 



XL. — Radiation and Absorption of Heat by Leaves ; by A. 



G. Mayer 340 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Improved Boiling-point apparatus for determining 

 Molecular Masses, Sakurai, 346. — Color of the Ions, Ostwald, 347. — Affinity- 

 coefficients of Acids, Lelljiann and Schliemann, 348. — Reaction of Hydrogen 

 with. Chlorine and Ox} r gen, Harker: Daily variation of Gravity, Mascart, 

 349. — Simple apparatus for the determination of the Mechanical Equivalent of 

 Heat, C. Christiansen : Asymmetry in Concave Gratings, J. R. Rydberg: 

 Potential of Electric Charges, A. Heydneiler : Sensitive Galvanometer, H. E. 

 J. G. DuBois and H. Rcbens: Experiments with Currents of High Frequency, 

 A. A. C. Swinton, 350. 



Geology— Correlation Papers, Neocene (Bulletin of the U. S. Geol. Survey), W. 

 H. Dall and G. D. Harris, 351. — Michigan Geological Survey for 1891-2: 

 Geological Survey of Missouri, 1892: Geological Survey of Texas, 1892: The 

 Journal of Geology, 354. — Republication of Conrad's "Works: Lines of Struc- 

 ture in Meteorites, 355. 



Botany — Localization of the perfumes of Flowers, Mesnakd: Botanical Prizes of 

 the French Academy, 355. — How blanched seedlings can be saved, Cornu: 

 Influence of moisture on vegetation, E. Gain, 356. 



Astronomy — Transactions of the Astr. Observatory of Tale University, 357. — 

 Schreiner's Spectral-Analyse der Gestirne, 358. 



Miscellaneous Scientific Intelligence — Observations in the West Indies. A. 

 Agassiz, 358.— Barrier Reef of Australia, W. Saville-Kent: Logarithmic 

 Tables, G. W. Jones, 362. 



Obituary— Nicolas Koksharov. 362. 



