

CONTENTS. 



Page 



Art. XXXIX. — Relative Activity of Radium and Thorium, 



measured by the Gamma-Radiation; by A. S. Eve 477 



XL. — Fossil Bird from the Wasatch ; by F. B. Loomis 481 



XLI. — Iodometric Determination of Basic Alumina and 

 of Free Acid in Aluminium Sulphate and Alums ; 

 by S. E. Moody 4 83 



XLII. — Separation of Arsenic from Copper as Ammo- 

 nium-Magnesium Arseniate ; by F. A. Gooch and M. A. ^ 

 Phelps _ ._..__ _ 488 



XLIII. — Contributions to the Geology of New Hamp- 

 shire: No. II, Petrography of the Belknap Mountains; 

 by L. V. Pirsson and H. S. Washington _"_.. 493 



XLIV. — Yttrocrasite, a New Yttrium-Thorium-Uranium 



Titanate ; by W. E. Hidden and C. H. Warren 515 



XLV. — Note on the Estimation of Niobium and Tan- 

 talum in the presence of Titanium ; by C. H. Warren 520 



XLVI. — Ceanothus Americanus L. and ovatus Desf. ; a 



morphological and anatomical study; by T. Holm 523 



XLVII. — Photometric Measurements on a Person Pos- 

 sessing Monochromatic Vision ; by F. L. Tufts 531 



XLVIII — Eodevonaria, a new Sub-Genus of Chonetes ; by 



C. L. Breger 534 



XLIX. — Note on the Production of Radium by Actinium ; 



by B. B. Boltwood . _ 537 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Quantitative Separation of Beryllium and Alumin- 

 ium, B. 9 lassman : Temperature at which Water Freezes in Sealed Tubes, 

 Miers ar I Isaac, 539. — Preparation of Fused Molybdenum, Biltz and 

 Gartot , : Potassium-lead Chlorides, Lorenz and Ruckstuhl : Ammo- 

 nium ^oin the Recent Eruption of Vesuvius, Stoklasa : Beitraege zur 

 Che lischen Physiologie und Pathologie, F. Hofmeister, 540. — Change of 

 Cclloidal Nucleation in wet dust-free Air in the lapse of time, C. Barus : 

 Leitfaden der praktischen Optfk, A. Gleichen, 541. 



Geology — New Zealand Geological Survey, J. M Bell, 542. — Illinois 

 State Geological Survey, H. F. Bain : Geological Survey of Ohio, E. Orton, 

 543. — Indiana: Department of Geology and Natural Resources, W. S. 

 Blatchley : Geological Survey of New Jersey, H. B. Kummel : Geological 

 Survey of Canada, R. Bell, 544. — Bibliography of Clays and the Ceramic 

 Arts, J. C. Branner : Festschrift Harry Rosenbusch, gewidmet von seinen 

 Schulern zum siebzigsten Geburtstag, 545. — Evidence Bearing on Tooth- 

 cusp Development, J. W. Gidley, 546. — Origin of Birds, 547. 



Miscellaneous Scientific Intelligence — National Academy of Sciences, 548. — 

 Human Mechanism ; its Physiology and Hygiene and the Sanitation of its 

 Surroundings, T. Hough and W. T. Sedgwick : Voyages and Explorations 

 of Samuel de Champlain, translated by A. N. Bourne : Field operations 

 of Bureau of Soils, 1904, 550. \ ^ * ** ^Oji** 



Index to Vol. XXII, 551. 



313 



V- 



