VI CONTENTS. 



Number 166. 



Page 



Art. XXXII. — Binary Systems of Alumina with Silica, 

 Lime and Magnesia ; by E. S. Shepherd and G. A. 

 Rankin. With Optical Study, by F. E. Wright 293 



XXXIII. — Specific Heats of Silicates and Platinum ; by W. 



P. White 334 



XXXIV.— Complexity of Tellurium ; by P. E. Browning 



and W. R. Flint ... 34V 



XXXV. — Arizonite, Ferric Metatitanate ; by C. Palmer 353 



XXXVI. — Retardation of Alpha Rays by Metals and Gases; 



by T. S. Taylor ._ 357 



XXXVII.— Physiography of the Central Andes: II. The 



Eastern Andes ; by I. Bowman 373 



XXXVIII. — New Species of Teleoceras from the Miocene of 

 . Nebraska ; by T. F. Olcott 403 



Samuel William Johnson 405 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — New Method for the Determination of Iodides and 

 Free Iodine, Bugarsky and Hovrath : Chemical Action of the Penetrat- 

 ing Kays of Radium upon Water, M. Kernbaum, 408. — Decomposition of 

 Water by Ultra-violet Rays, M. Kernbaum : Radio activity of Potassium 

 Salts, Henriot and Vavon : Cementation of Iron by Charcoal in a Vacuum, 

 Guillet and Griffiths, 409. 



Geology— Devonian Faunas of the Northern Shan States, F. R. Cowper 

 Reed : Osteology of the Jurassic reptile Camptosaurus, C. W. Gilmore, 

 410. — Systematic relationships of certain American Arthrodires, L. Hus- 

 sakof : Revision of the Entelodontidfe, O. A. Peterson : New Species of 

 Procamelus from the Upper Miocene of Montana, E. Douglass : Notes on 

 the fossil mammalian genus Ptilodus with descriptions of new species, 

 J. W. Gidley, 411. — Descriptions of two new species of Pleistocene 

 ruminants of the genera Ovibos and Bootherium, J. W. Gidley, 412. 



Miscellaneous Scientific Intelligence — British Association for the Advance- 

 ment of Science : Einfuhrung in eine Philosophie des Geisteslebens, R. 

 Eucken, 412. 



