CONTENTS. 



Page 



Art. XLIIL— Nitrogen Thermometer Scale from 300° to 

 630°, with a Direct Determination of the Boiling Point 

 of Sulphur; by A. L. Day and R. B. Sosmax 517 



XLIV.— Note on the Standard Scale of Temperatures be- 

 tween 200° and 1100°; by L. H. Adams and J. John- 

 ston . _ 534 



XLV. — Note on Measurements of Radio-activity by Means 



of Alpha Rays; by W. R. Barss 1 .... 546 



XL VI.— The Binary System : Na 2 Al 2 Si 2 8 (Nephelite, Car- 



negieite)— CaAl 2 Si 2 8 (Anorthite); by N. L. Bowen... 551 



XL VII. — New Occurrence of Carnotite; by E. T. Wherry 574 

 XLVIIL— Age of the Cleveland Shale of Ohio; by H. P. 



CuSHING _ 581 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Ultra-filtration in Chemical Analysis, Dorfurt and 

 Galecki : Magnesia Rods as a Substitute for Platinum Wire, E, Wade- 

 kind, 585. — Combustion of Carbon Monoxide, Wieland : Purity of Com- 

 mercial Metals, F. Mylius, 586. — Effect of Temperature upon Radio-active 

 Disintegration, A. IS. Russell, 587. — Das Magnetische Spektrum der /?- 

 Strahlen des Thoriums, von Baeyer, Hahn, and Meitner, 588. — Applied 

 Physics for Secondaiy Schools, V. D. Hawkins : Die Messung vertikaler 

 Luftstromungen, P. Ludewig, 589. — Teaching of Physics for Purposes of 

 General Education, C. R. Mann : Uber Zerfallprozesse in der Natur, 

 C. Engler, 590. 



Geology — Evolution of the Vertebrates and their Kin, W. Patten, 590. — 

 Die Wirbeltiere : eine Ubersicht liber die fossilen und lebenden Formen, 

 O. Jaekel ; American Permian Vertebrates, S. W. Williston, 592. — 

 Maryland Geological Survey : Method of Removing Tests from Fossils, 

 S. S. Buckman, 593. — Virginia Geological Survey : West Virginia Geolog- 

 ical Survey, 594. — Wisconsin Geological and Natural History Survey : 

 Building Stones and Clays, E. C. Eckel : Mineralogy, F. H. Hatch, 595. 



Miscellaneous Scientific Intelligence — Annals of the Association of American 

 Geographers, R. E. Dodge : Annual Report of the Director of the Field 

 Museum of Natural History, 596. — Science Reports of the T6hoku Imperial 

 University, Sendai, Japan : Fourth Report of the Wellcome Tropical Re- 

 search Laboratory, 597. — Life and Love of the Insect, J. H. Fabre : 

 Evolution of Animal Intelligence, S. J. Holmes, 598. 



Obituary — P. N. Lebedew : A. Topler : E. Divers : G. Bcrup, 598. 

 Index to Volume XXXIII, 599-604. 



313 



