CONTENTS TO VOLUME XLV. 



Number 265. 



Page 

 Art. T. — The Problem of the Cretaceous-Tertiary Boundary 

 in South America and the Stratigraphic Position of the 

 San Jorge-Formation in Patagonia; by A. Windhausen 1 



II. — On the Rate of Solution of Silver in Chromic Acid; by 



R. G. Van Name and D. U. Hill 54 



III. — Early Silurian Rocks of the Northern Peninsula of 



Michigan; by T. E. Savage and H. F. Crooks.. 59 



IV.— A Second Meteorite Find in Florida; by G. P. Merrill 64 



V. — On Mullanite, a new Member of the Jamesonite Group, 



from Two Localities; by E. V. Shannon .' 66 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Solubility of Bismuth Oxj- chloride in Hydrochloric 

 Acid and its Eelation to Complex Formation, A. A. Notes, F. W. Hall, 

 and J. A, Beattie : Bevision of the Cobalti-Nitrite Method for the 

 Determination of Botash, C. B. Haff and E. H. Schwartz, 71. — Estima- 

 tion of Arsenic in Organic Compounds, A. J. Ewins : Calorimeter for 

 Measuring Heats of Dilution, D. A. MacInnes and J. M. Braham, 72. — 

 Detection of Carbon in Inorganic and Organic Substances, E. Mueller : 

 Extreme Ultra- Violet Spectra of Helium, Hydrogen, and Mercury, O. W. 

 Bichardson and C. B. Bazzon, 73. — Navigation, H. Jacoby, 74. — Bracti- 

 cal Byrometry, E. S. Ferry, G. A. Shook, and J. B. Collins, 75.— The 

 Mystery of Matter and Energy, A. C. Crehore, 76. 



Geology — Structure of the Himalayas, and of the Gangetic Blain, as eluci- 

 dated by Geodetic Observations in India, B. D. Oldham, 76. — The Origin 

 and Evolution of Life, H. F. Osborn, 77. — The Cretaceous Faunas of the 

 Northeastern Bart of the South Island of New Zealand, H. Woods: 

 New and Little Known Gastropods from the Upper Cretaceous of Ten- 

 nessee, B. Wade : The " Mark Stirrup" Collection of Fossil Insects from 

 the Coal Measures of Commentry (Allier), Central France, H. Bolton: 

 Fossil Blants from Bolivia and their Bearing upon the Age of Uplift of 

 the Eastern Andes, E. W. Berry, 78. — West Virginia Geological Survey, 

 I. C. White: United States Bureau of Mines, Year Book for 1916, V. H. 

 Manning, 79. 



Obituary— E. Hull, 80. 



