CONTENTS TO YOLUME XIY. 



NumLjr T9. 



Page 

 Art I. — Spectra Arising from the Dissociation of Water 



Yapor, and the Presence of Dark Lines in these Spectra ; 



by J. Tkowbkidge. (With Plate I.) 1 



II. — Occurrence of Greenockite on Calcite from Joplin, Mis- 

 souri : by H. B. Cornwall •_ .._ 1 



III. — Quantitative Study of Yariation in the Fossil Brachio- 



pod Platystrophia lynx ; by E. R. Cumings and A. Y. 



Mauck. (With Plates II-III.) 9 



IV. — Studies of Eocene Mammalia in the Marsh Collection, 



Peabody Museum; by J. L. Wortman 17 



Y. — New Exposures of Eruptive Dikes in Syracuse, N. Y. ; 



by P. F. Schneider 24 



YI. — Petrography of Recently Discovered Dikes in Syra- 

 cuse, N. Y ; by C. H. Smyth, Jr. . _ _ 26 



YII. — Preliminary Note on Silver Chabazite and Silver 



Analcite ; by G. Steiger . 31 



YIII. — Significance of Certain Cretaceous Outliers in the 



Klamath Region, California ; by O. H. Hershey 33 



IX. — Action of Copper Sulphate upon Iron Meteorites ; by 



O. C. Farringtox 38 



X. — Petrographical Contribution to the Geology of the 



Eastern Townships of Quebec ; by J. A. Dresser 43 



XL — Action of Carbon Dioxide on the Borates of Barium ; 



by L. C. Jones 49 



XII. — Studies in the Cyperacege ; by T. Holm. XYI 57 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Probable Source of the Heat of Chemical Combina- 

 tion, T. W. EiCHARDS: Lithium Silicide, Moissan : Black Color of the 

 Eocks in the Cataracts of the Nile, Lortet and Hugounenq : Bismuth- 

 lead Sulphide-halides, Ducatte, 64. — Atomic Weight of Uranium, 

 EiCHARDS and Merigold : Qaalitative Chemistry, Prescott and Sulli- 

 van : Qualitativen Analyse, W. Bottger, 65. — Eeflection Power of 

 Metals for Ultra-violet and Ultra-red Bays, E. Hagen and H. Eubens, 

 66. — Spark Discharge from Metallic Poles in Water, Wilsing : Electrical 

 Effect of Light, P. Lenard : Interference Tubes for Electrical Waves, 

 A. Becker : Law of Velocity which Cathode Eays suffer by Eeflection, E. 

 Gehrcke, 67. — Eole of Self-induction in discharges of Electricity through 

 Gases, M. B. Eginitis and M. A. de Gramont : Theory of Optics, P. 

 Drude, 68. — Elementary Principles in Statistical Mechanics, J. W. Gibbs : 

 Beitrage zur ehemischen Physiologie, F. Hofmeister, 69. 



Geology and Natural History — U. S Geological Survey : Mineralogie de la 

 France, Lacroix : Size of Grain in Igneous Eocks, Queneau, TO. — 

 Eparchaean Interval, Lawson : Former Extent of the Newark System, 

 HoBBS : Quaternary History of So. California, Hershey : Plissements et 

 Dislocations de I'Ecorce terrestre, Negris, 7L — Tungsten Mine at Trum- 

 bull, Conn., HoBBS : Eruption of Mt. Pelee, Verrill, 72. — Maldive and 

 Laccadive Archipelagoes, Gardiner : Actinians of Porto Eico, Duerden : 

 Ascidians of the Bermuda Islands, Van Naivie, 74. — Embryology of 

 Terebratulina septentrionalis, Conklin : Yellow Fever investigations at 

 Havana, Gargas, 75. 



Miscellaneous Scientific Intelligence — Smithsonian Institution : United States 

 Weather Bureau, A. J. Henry : Scientia : Ostwald's Klassiker, 76. 



