Vlll CONTENTS. 



Number 276. 



Art. LV. — Endothermic Decompositions obtained by Pres- 

 sure. Second Part. Transformations of Energy by 

 Shearing Stress; by M. Carey Lea 413 



LVI. — Quartz from the Emerald and Hiddenite Mine, North 



Carolina; by H. A. Miers 420 



LVIL — Double Chlorides, Bromides and Iodides of Caesium 



and Cadmium; H. L. Wells and P. T. Walde^ 425 



LVIII. — Double Chlorides, Bromides and Iodides of Caesium 

 and Zinc, and of Caesium and Magnesium ; by H. L. 

 Wells and G. F. Campbell __„ 431 



LIX. — New fossil localities in the early Paleozoics of Penn- 

 sylvania, New Jersey and Vermont, with remarks on 

 the close similarity of the lithologic leatures of these 

 Paleozoics; by Aug. F. Foekste _ 435 



LX. — An apparent Time-break between the Eocene and 

 Chattahoochee Miocene in Southwestern Georgia; by 

 Raphael Pumpelly 445 



LXI. — Rise of the Mammalia in North America; by Henry 



F. Osborn. (With Plate XI.) 448 



LXII. — Thoracic Legs of Triarthrus; by C. E. Beecher 467 



LXIir. — Diamond in the Canon Diablo Meteoric Iron and on 

 the hardness of Carborundum; by George Frederick 

 Kunz and Oliver W. Huntington 470 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics— Mass-composition of Water, Dittmar and Henderson- 

 473. — Constitution of Hydrogen peroxide and of Ozone, Traube, 474 — Forma- 

 tion of Ozone at high Temperatures, Brunck, 475. — Preparation and Proper- 

 ties of pure Nitrogen, Threlfall, 476. — Preparation of Carbon under High 

 Pressure. Moissax: Properties of Diamonds. Moissan, 477. — Oxygen in Illum- 

 inating Gas: Refractive indices of Liquid Nitrogen and Air, Liveing and 

 Dewar, 4 78 — Rotation air- Pump, F. S. Berge: Waves in air, A. Raps: 

 Standards of low Electrical Resistance, Jones: Equipotential and Magnetic 

 force-lines, E. von Lommel, 479. — Hand- und Hilfsbuch zur Ausfiishrung 

 Physiko-chemischer Messuugen, W. Ostwald, 480. 



Geology and Mineralogy — Origin of Crystalline Schists, J. J. H. Teall, 480. — Ore 

 Deposits of the United States, J. F. Kemp, 481 — Sach- und Orts-Verzeichniss 

 zu den Mineralogischen und Geologischen Arbeiten von Gerhard vom Rath, 

 W. Bruhns and K. Busz: Mineralogisches Lexicon fur das Kaiserthum Oester- 

 reich von V. von Zepharovich: Handbuch der Mineralogie von C. Hintze: 

 Meteorite from Hamblen Co., Tennessee, L G. Eakins, 482. 



Miscellaneous Scientific Intelligence— Letters of Asa Gray, J. L. Gray: National 

 Academy of Sciences, 483. — Annalen der Physik und Chemie, 484. 



Obituary— Arcangelo Scacchi: Herman August Hagen: George W. Coak- 

 let, 434. 



Index to Vol. XLVI, 485. 



