CONTENTS. 



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, Peabody 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, Demarcat: Research Papers 

 from the Kent Chemical Laboratory of Tale University, P. 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- 

 te : Catalogue of the African Plants collected by Dr. P. Welwitsch in 1853-61 : 

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

 bearbeitet, R. Bornstein, 324.— Studien iiber 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. 



