Yl CONTENTS. 



Number 226. 



Page 



Art. XXIV. — Experiments on the Active Deposit of Radium ; 



by E. M. Wellisch 283 



XXV.— The Optical Properties of Roscoelite ; by F. E. 



Weight 305 



XXVI. — Geological Notes on the Andes of Northwestern 



Argentina ; by H. S. Palmer 309 



XXVII. — Geology of Bermuda Island ; Petrology of the 



Lavas ; by L. V. Pirsson 331 



XXVIII. — Moraine of Kansan or Nebraskan Age at Jackson, 



New Hampshire ; by P. Maxwell Foshay 345 



XXIX. — Rheostat of Variable Range, suitable for Large 



Currents ; by R. G. Van Name . . _ 349 



XXX. — Possibility of Detecting Contractions of the Order 



of the Fitzgerald -Lorentz Effect ; by C. Barus 352 



XXXI. — Simultaneous Crystallization of Calcite and Certain 

 Sulphides of Iron, Copper and Zinc. A Crystallographic 

 Study ; by H. E. Merwin . _ 355 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Atomic Weight of Lead of Radioactive Origin, M. 

 Curie, 360. — Two New Modifications of Phosphorus, P. W. Bridgeman, 

 361. — Detection of Cyanides in the Presence of Ferrocyanides, Ferricyanides 

 and Thiocyanates, O. C. Barnebey : Colorimetric Determinations, C. 

 Huttner : Origin of the Cyanogen Bands, W. Grotrian and C. Runge, 

 362. — Influence of Magnetic Fields on Explosions, H. B. Dixon, C. Camp- 

 bell and W. E. Slater, 364. — Spectrum of Silicon, W. Crookes, 365. — 

 Solar Oxygen, K. W. Meissner : X-Rays, G. W. C. Kate : First Book of 

 Experimental Science, W. A. Whitton, 366. 



Geology— Early Cambrian stratigraphy in the North American Cordillera, 

 with discussion of the Albertella and related faunas, L. D. Burling: 

 Notes on the Lorraine Faunas of New York and the Province of Quebec, 

 A. F. Foerste : Fauna of the Martinez Eocene of California. R E. Dicker- 

 son, 367. — West Virginia Geological Survey : Mining Practice : Western 

 Australia Geological Survey, 368. — Geology of the Titanium and Apatite 

 Deposits of Virginia, T. L. Watson and S. Taber, 369. 



Miscellaneous Scientific Intelligence— Conferences de Racliumbiologie, faites 

 a l'Universite de Gaud en 1913, MM. J. Danne, P. Giraud, H. Coutard, 

 G. Danne, 369. 



Obituary— 0. Fisher : A. J. Jukes-Brown : E. Reyer : H. Klein : F. H. 

 Storer : F. W. True : S E. Meek : C. Fuchs : A. S. Bickmore : F. W. 

 Hooper : H. C. Hovby, 370. 



