viii CONTENTS. 



Number 42. 



Page 



Othniel Charles Marsh; by C. E. Beecher 403 



Art. XLVL— Camden Chert of Tennessee and its Lower 



Oriskany Fauna; by J. M. Safford and C. Schucheet 429 



XLVIL— Recent discovery of rocks of the age of the Trenton 

 formation at Akpatok Island, Ungava Bay, Ungava; by 

 J. F. Wjbiteayes 433 



XLVIII.— Studies in the Cyperacese, X ; by T. Holm 435 



XLIX.— Roscoelite ; by W. F. Hillebeand and H. W. 

 Turner, with a note on its chemical constitution by F. 

 W. Clarke - 451 



L.— Gravitation in Gaseous Nebulae; by F. E. Nipher 459 



LI. — Titration of Oxalic Acid by Potassium Permanganate 

 in presence of Hydrochloric Acid ; by F. A. Gooch and 

 C A. Peters... --- 461 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Influence of Electric Oscillations on Vapors. Kauffman: 

 Occlusion of Oxygen and Hydrogen by Platinum black, Mond, Ramsay and 

 Shields, 468. — Certain Derivatives of Acetylene, Erdman and Kothner, 469. 

 — Eutropic Series of the Calcium Group, Eppler: Distribution of Vanadium, 

 Hasselberg, 470. — Determination of time of vibration of very high, notes, F. 

 Melde : Heat conductivity of different kinds of glass, A. "Wink elm ANN : Ab- 

 sorption of Electric Waves by different substances, E. Branly and G. Lebon : 

 Radiations of Uranium, H. Becquerel,, 471. — Source of Uranium Radiations, 

 W. Crookes: Phosphorescence at Low Temperatures, A. and L. Lumiere: 

 Recueil Donnees numeriques publie par la Societe Franchise de Physique, H. 

 Dufet, 472. 



Miscellaneous Scientific Intelligence— Icthyologia Ohiensis by C. S. Rafinesque, R. 

 E. Call: Elementary Physiology, B. Moore, 473. — Experimental Morphology, 

 Pari II, ('. B. Davenport: Recherche, Captage et Amenagement des Sources 

 Thermo-Min6rales, L. De Launay, 474. 



Obituary— Dr. Franz Rittek von Hauer, 474. 

 Ini>k\ to Volume VII. 475. 



