V1U , CONTENTS. 



Number 186. 



Art. XXXVIII. — Podokesaurus holyokensis, a New Dino- 

 saur from the Triassic of the Connecticut Valley ; by M. 

 Talbot. (With Plate IV.) 469 



XXXIX. — Minerals Associated with Diamonds and Carbon- 

 ados in the State of Bahia, Brazil ; by J. C. Branner.. 480 



XL. — An Engelhardtia from the American Eocene ; by E. 



W. Berry 491 



XLI. — Use of Sodium Paratungstate in the Determination 

 of Carbon Dioxide in Carbonates and Nitrogen Pent- 

 oxide in Nitrates ; by F. A. Gooch and S. B. Kuzirian 497 



XLIL— Influence of Pressure on the Melting Points of 



Certain Metals; by J. Johnston and L. H. Adams .... 501 



XLIII. — A New Occurrence of Pearceite ; by P. B. Van 



Horn and C. W. Cook 518 



XLI V.— Mollugo verticillata L. ; by T. Holm 525 



XLV. — Composition and Crystallization of Parisite and 

 Occurrence in the Granite-Pegmatites at Quincy, Mass., 

 U. S. A., etc., by C. Palache and C. H. Warren 533 



XL VI. — Notes on the Absence of a Soil Bed at the Base of 



the Pennsylvanian of Southern Ohio ; by J. E. Hyde .. 557 



XL VII. — A New Jolly Balance ; by E. H. Kraus 561 



XL VIII. — Independence of the Coronas of the Thickness of 



the Fog Layer ; by C. Barus 564 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics. — Radium Contents of some Uranium Minerals, 

 Maeckwald and Russell, 566. — Determination of Cane Sugar in the 

 presence of other Sugars, A. Jolles : Action of Sulphur Dioxide upon 

 Ammonia, Ephraim and Piotrowski, 567. — Quantitative Chemical Analy- 

 sis of Mixtures, H. Friedenthal : Metallic Coloring in Birds and 

 Insects, A. A. Michelson, 568. — Isolation of an Ion, a Precision Meas- 

 urement of its Charge, and the correction of Stokes Law, R. A. Millikan, 

 570. — Homogeneous Rontgen Radiation from Vapors, J. C. Chapman, 

 571. — Lehrbuch der Kristallphysik, W. Voigt, 572. — Electrical Nature of 

 Matter and Radioactivity, H. C. Jones, 573. 



Geology and Mineralogy. — Illinois State Geological Survey: New Zealand 

 Geological Survey, 573. — Geological Survey of Western Australia : Geo- 

 logical Survey of Canada, 574. — Mineral Production in the United States 

 in 1909, 575. — Production of Gems and Precious Stones in 1909 : Production 

 of Bauxite in 1909 : Origin of the Thermal Waters in the Yellowstone 

 National Park, 576. — Tables for the Determination of Minerals, E. H. 

 Kraus and W. F. Hunt : Striiverite, R. C. Wells, 577. 



Miscellaneous Scientific Intelligence. — Bulletin of the Bureau of Standards : 

 Prehistoric Period in South Africa, J. P. Johnson, 578. — Field Museum 

 of Natural History : Astronomical and Astrophysical Society of America, 

 580. — Harvard College Observatory : Cincinnati Observatory : Princeton 

 University Observatory : R. Comitato Talassografico Italiano, 581. — Con- 

 gress of the Applications of Electricity : Congress of Applied Chemistry : 

 Anthropological Society : University of Bologna, 582. 



Obituary. — Samuel H. Scudder ; M. Edouard Dupont : Thomas Rupert 

 Jones ; J. Bosscha, 582. 



Index to Volume XXXI, 583. 



