CONTENTS. 



Page 



Art. XXVIII. — New Devonian Formation in Colorado ; by 



W. Cross 245 



XXIX. — Upper Devonian Fish Remains from Colorado : by 



C. R. Eastman ._ 253 



XXX. — Fossil Turtles belonging to the Marsh Collection in 

 Yale University Museum ; by 0. P. Hay. (With Plates 

 XI-XVI).../. 261 



XXXI. — Air Radiation; by C. C. Hutchins and J. C. 



Pearson _ _ 277 



XXXII. — Uintacrinus and Hemiaster in the Vancouver Cre- 

 taceous ; by J. F. Wiiiteaves 287 



XXXIII. — Separation of the most Volatile Gases from the 



Air without Liquefaction ; by J. Dewar _ . 290 



XXXIV. — Absorption and Thermal Evolution of Gases 

 occluded in Charcoal at Low Temperatures ; by J. 

 Dewar 295 



XXXV.— Studies in the Cyperacea?, No. XXIII ; by T. Holm. 



(With figures in the text) 301 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Atomic Weight of Beryllium. C. L. Parsons : Con- 

 nection between the Volatility of Compounds and the Forces at Play 

 within the Molecule, G. Martin : Method for the Determination of Chloric 

 Acid, Hexdrlxson, 808. — Investigation of Double Salts by the Determina- 

 tion of Solubility, Foote and Bristol : Nitrous Anhydride, Wittorff : 

 Probable Cause of the Yearly Variation of Magnetic Storms and Auroras, 

 N. Lockyer and W. J. S. Lockyer, 809. — Physikalische Technik. oder 

 Anleitung zu Experimentalvortragen sowie zur Selbstherstellung einfacher 

 Demonstrationsapparate, 313. 



Geology — Eecent Studies of the Moon's Features, 314. — Cretaceous Deposits 

 of the Pacific Coast. F. M. Anderson. 818. — Geology of German Southwest 

 Africa, F. W. Voit : Liassie and Oolitic Floras of England. A. C. Seward, 

 819. 



Miscellaneous Scientific Intelligence — British Association: Metric Fallacy, 

 F. A. Halsey ; The Metric Failure in the Textile Industry. S. S. 

 Dale, 320. 



Obituary — Dr. Joseph D, Everett, 320. 



