CONTENTS. 



Page 

 Art. XII. — Recent Observations in Atmospheric Electricity; 



by P. H. Dike _ 197 



XIII. — Iodyrite from Tonopah, Nevada, and Broken Hill, 



New South Wales ; by E. H. Kraus and C. W. Cook__ 210 



XIV. — Deviation of Rays by Prisms; by H. S. Uhler 223 



XV. — Heat of Oxidation of Tin, and second paper on the 

 ' Heat of Combination of Acidic Oxides with Sodium 

 Oxides ; by W. G. Mixter 229 



XVI. — Neptunite Crystals from San Benito County, Cali- 

 fornia ; by W. E. Ford ._ _. 235 



XVII. — Gravimetric Determination of Silver as the Chro- 



mate ; by F. A. Gooch and R. S. Bosworth 241 



XVIII. — Doppler Effect in Positive Rays; by J. Trowbridge 245 



XIX. — New Armored Saurian from the Niobrara ; by G. R. 



Wieland _ _ 250 



WOLCOTT GlBBS _ _ _ 253 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics— New Method of Forming Liquid Alloys of Sodium 

 and Potassium, Jaubert : Determination of Cerium and other Eare Earths 

 in Eocks, Dietrich, 260. — Solvability of Metallic Gold in Hydrochloric 

 Acid in the presence of Organic Substances, Awerkiew : The Composi- 

 tion of Matter, E. Mulder, 261. — Introduction to the Earer Elements, P. 

 E. Browning : Feste Losungen und Isomorphism, G. Bruni : Produc- 

 tion of Helium from Uranium, F. Soddy : Charge and Nature of the 

 a-Particle, E. Eutherpord and H. Geiger : Amount of Water in a Cloud 

 formed by Expansion, W. B. Morton, 262. — Permanent Magnetism of 

 Copper, J. G. Gray and A. D. Eoss : United States Magnetic Tables and 

 Magnetic Charts for 1905, L. A. Bauer, 263. 



Geology and Natural History— Fossilen Insekten und die Phylogenie der 

 Eezenten Formen, A. Handlirsch, 263. — Connecticut Geological and 

 Natural History Survey, W. N. Eice : Mississippi State Geological Sur- 

 vey, A. F. Crider, 264. — Interpretation of Topographic Maps, E. D. 

 Salisbury and W. W. Atwood : Zonal Belt Hypothesis, a New Explana- 

 tion of the Causes of the Ice Age, J. T. Wheeler : Handbuch der Min- 

 eralogie, C. Hintze : Chemische Krystallographie, P. Groth, 265. — Notes 

 of a Botanist on the Amazon and Andes, E. Spruce, 266. 



Miscellaneous Scientific Intelligence — Carnegie Institution of Washington. 

 Year Book No. 7, 1908, 267.— Eeport of the Librarian of Congress and 

 Eeport of the Superintendent of the Library Buildings and Grounds, H. 

 Putnam : Harvard College Observatory, E. C. Pickering, 269. — Publica- 

 tions of the Allegheny Observatory of the University of Pittsburgh : 

 Washburn Observatory of the University of Wisconsin, G. C. Comstock : 

 Treatise on Spherical Astronomy, E. Ball : Bulletin of the Mount 

 Weather Observatory, W. J. Humphreys, 270. — National Antarctic Expe- 

 dition, 1901-1904 : Chemical Constitution of the Proteins, E. H. Aders 

 Plimmer, 271. — Standard Algebra, W. J. Milne: Kraft, okonomische, 

 technische und kulturgeschichtliche Studien uber die Machtentfaltung der 

 Staaten, E. Beyer : International Congress of Applied Chemistry : The 

 Science Year Book, 272. 



Obituary— H. G. Seeley, 272. 



