

_ 



CONTENTS 



Art. XLIII.— Vertebrate Fossils of Rock Creek, Texas ; by 



E. L. Troxell. (With Plate IX) 613 



XLIV.— Volumetric Determination of Polythionic Acids by 



Potassium Iodate ; by G. S. Jamieson . 639 



XL V.— Datolite from Great Notch, New Jersey; by C. W 



Cook and E. H. Kraus . . _ . ..." 642 



XLVI— Fully Exposed Reef of Calcareous AJgse (?)"in the 



Middle Cambrian of the Teton Mountains; by E. 



Blackweldee __ 646 



XL VII. —Limestone Solution on the Bottom of Lake Ontario- 



by E. M. Kindle _ _ _' 651 



XLVIIL— Certain Points in Petrographic Classification; by 



W.Cross _ __ 657 



XLIX. — Separation of Magnesium from Lithium by Means 



of Ammonium Carbonate in Alcoholic Solution; by J. 



G. DlNWIDDIE 662 



L— Extrusive Basalt of Cambrian Age in the Blue Rid^e of 



Virginia; by T. L. Watson and J. H. Cline L. . .. 665 



LI.— Identity of Footeite with Connellite together with the 



Description of two new Occurrences of the Mineral; by 



W. E. Ford and W. M. Bradley '. 670 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics— Fixation of Atmospheric Nitrogen, W. S. Landis 

 676.— Electroplating with Cobalt, H. T. Kalmus, C. H. Harper, and W.' 

 L. Savell: Use of Mercuric Oxide for Standardizing Volumetric Solu- 

 tions, M, A. Abelmann: Manual of Practical Physical Chemistiy, F. W. 

 Gray, 677. — Practical Physical Chemistry, A. Findlay: Molecular Asso- 

 ciation, W. E. S. Turner: X-Eays and Crystal Structure, W. H. and W. 

 L. Bragg, 678.— Elementary Chemical Microscopy, E. M. Chamot, 679.— 

 Hancock's Applied Mechanics for Engineers, N. C. Riggs: Electricity for 

 the Farm, F. 1. Anderson, 680. 



Geology— Geology of the North American Cordillera at the Forty-ninth 

 Parallel, E. A. Daly: Florida State Geological Survey, E. H. Sellards, 

 681. — Biennial Report of Topographic and Geologic Survey of Pennsyl- 

 vania for the two years ending June 1, 1914: Geological Survey of Illinois, 

 J. A. Udden : Publikationer fra det Danske Meteorologiske Institut, C. 

 Ryder, 682. —Dew-Ponds; History, Observation and Experiment, E. A. 

 Martin; Union of South Africa, Department of Mines and Industries: Fos- 

 sil Birds in the Marsh Collection, C. W. Shufeldt, 683. 



Miscellaneous Scientific Intelligence— Report on the Starfishes of the West 

 Indies, Florida, and Brazil, etc., A. E. Verrill, 684.— American Hydroids, 

 Part III ; The Carnpanularidae and the Bonneviellidre, C. C. Nutting: 

 Nahrungsmittelchemie. in Vortragen, W. Kerp, 684.— Leavening Agents, 

 N. Hart: Mining World Index, Vol. VI: Museum of the Brooklyn Institute 

 of Arts and Sciences: Report of Board of Scientific Advice for India, 1913- 

 1914, 685. - 



Obituary— S. Smith, 685.— W. G. Adams: E. Fraas: E.-H. Amagat, 686. 

 Index, 687. 



313 



