VI CONTENTS. 



Number 70. 



Page 

 Art. XXVII. — Galvanometers of High Sensibility ; by C. 



E. Mendenhall and 0. W. Waidner 249 



XXVIII. — Method of Locating Nodes and Loops of Sound 



in the Open Air with Applications ; by B. Davis. 263 



XXIX. — Anatomy of the Fruit of Cocos nucifera ; by A. L. 



Winton _ . _ . . 265 



XXX. — Studies of Eocene Mammalia in the Marsh Collec- 

 tion, Peabodv Museum; by J. L. Woetman. With 

 Plates I-IV... _..._ 281 



XXXI. — Crinoid from the Hamilton of Charlestown, Indiana ; 



by E.Wood. With Plate V 297 



XXXII. — Estimation of Caesium and Rubidium as the Acid 

 Sulphates, and of Potassium and Sodium as the Pyrosul- 

 phates ; by P. E. Browning __ 301 



XXXIII. — Time Values of Provincial Carboniferous Ter- 



ranes ; by C. R. Keyes _ _ . 305 



XXXIV. — Spectra of Hydrogen and some of its Compounds ; 



by J. Trowbridge. With Plate VI. ... 310 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Induced Radio-activity produced by Salts of Radium. P. 

 Curie and A. Debierne, 319. — New Method of Quantitative Analysis, R. W. 

 Thatcher, 320. — Europium, a New Element, DEMARgAY: Research Papers 

 from the Kent Chemical Laboratory of Yale University, F. A, Gooch, 321. — 

 Magnetic Effect of Electrical Convection, H. A. .Wilson : Effect of Amalgamated 

 Gases on Resistance, W. Rollins, 322. 



Miscellaneous Scientific Intelligence — American Association, 323. — British Associa- 

 tion: Catalogue of the African Plants collected by Dr. F. Welwitsch in 1853-61 : 

 Vol. II, Part II, Cryptogamia: Leitfaden der Wetterkunde, gememverstandlich 

 bearbeitet, R. Bornsteix, 324. — Studien uber die Narkose, E.Overton: Ueber 

 Harmonie und Complication, V. Goldschmidt: Nature's Miracles, Familiar 

 Talks on Science, E Gray, 325. 



Obituary— Charles Anthony Schott: Baron Adolf Erik Nordenskiold : 

 Dr. Wilhelm Schur: Baron de Lacaze-Duthiers, 326. 



