C X T E N T S . 



Page 



Art. Vin. — Geologic Reconnaissance of the Ayusbamba 



(Peru) Fossil Beds ; by H. E. Gregory 125 



IX. — Vertebrate Fossils from Ayusbamba, Peru ; by G. F. 



Eaton. (With Plates V, VI, VII) 141 



X. — The "Dam" at Cheshire, Connecticut ; by F. Ward.. 155 

 XL — Progressive Development of Mechanics based upon a 



New Form of Fundamental Principle of the Science ; 



by H. M. Dadourian .... 157 



XII. — Temiskamite, a new nickel arsenide from Ontario ; by 



T. L. Walker . 170 



XIII. — Use of the Ammonium Salt of Nitrosophenylhydro- 



xylamine (" Cupferron ") in the Quantitative Separation 



of Titanium from Iron ; by W. M. Thornton, Jr. 173 



XIV. — Contribution to the Optical Studv of the Amphiboles; 



by W. E. Ford '. 179 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Action of Aluminium Carbide upon Solutions of 

 Metallic Salts, Hilpert and Ditmar, 198. — Solubilities at tbe Critical 

 Temperatures of Solvents, F. Friedrichs: Organic Chemistry for Advanced 

 Students, J. B. Cohen : Industrial Chemistry for Engineering Students, 

 H. K. Benson, 194. — Outlines of Theoretical Chemistry, F. H. Getman : 

 Oxygen in the Sun, Etjnge and Paschen, 195. — Fluorescence of the Vapors 

 of Sulphur, Selenium and Tellurium, VV. Steubing, 196. — The Series 

 Lines of Neon, E. Eossi, 197. — Mass of Eapidly Moving Electrons, G. 

 Neumann, 198. 



Geology and Mineralogy — Changes in Level in the Earth's Crust, 0. Fisher, 

 199. — Meteorites vs. The Earth, 0. C. Farrington, 200.— San Franciscan 

 Volcanic Field, 202. — Devonian of Maryland : Stratigraphy and Paleontol- 

 ogy of the Alexandria?.! Series in Illinois and Missouri, Part I, T. E. 

 Savage : Important part played by calcareous Algfe at certain geological 

 horizons, E. J. Garwood, 203. — Geological Survey of Oklahoma : 

 Mineralogie de la France et de ses Colonies, A. Lacroix : Handbuch der 

 Mineralogie, C. Hintze, 204. 



Miscellaneous Scientific Intelligence — Semi-Centennial Anniversary of the 

 National Academy of Sciences, 1863-1913, 204. — Annual Tables of Con- 

 stants and Numerical Data, etc. : Fungi which cause Plant disease, F. L. 

 Stevens, 205. — Measures of Proper Motion Stars, S. W. Burnham, 206. — 

 Astronomy, H. Jacoby : The American Chemical Journal, 207. 



Obituary— S. W. Mitchell : B. O. Peirce : S. C. Chandler : W. Upton : C. 

 B. Eobinson : E. S. Ball : T. Lawrence : P. V. Bevan : W. P. Bloxam, 



