CONTENTS. vn 



Number 65. 



Page 

 Art. XXVII. — Studies of Eocene Mammalia in the Marsh 



Collection, Peabody Museum; by J. L. Wortman. 



With Plate V. _ 333 



XXVIII. — Velocity of Chemical Reactions; by W. Dtjane. 349 



XXIX. — Transmission of Sound through porous materials; 



by F. L. Tufts ._ 357 



XXX. — Yoke with intercepted Magnetic Circuit for measur- 

 ing Hysteresis ; by Z. Crook 365 



XXXL— Mineralogical Notes; by C. H. Warren _. 369 



XXXII. — Expansion of Certain Metals at High Tempera- 

 tures; by L. Holborn and A. L. Day 374 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Sulphur Hexafluoride, Thionyl Fluoride, and Sulphuryl 

 Fluoride, Moissan and Lebeau: Molecular Weight of Ozone, A. Ladenburg, 

 391. — Preparation of Chlorine from Sodium Chlorate, C. Graebe: New Alka- 

 loids in Tobacco, Pictet and Rotschy, 392. — Hydrate of Sulphuryl Chloride, 

 Baeyer and Yilliger: Action of Hydrogen Peroxide upon Silver Oxide. 

 Baeyer and Yilliger, 393. — Action of Alcohol on Metals with which it comes 

 in Contact, Malmejac : Excitation and Measure of Sine Currents, M. Wien : 

 Metallic Reflection of Electrical Waves, K. F. Lindman: Light Transparency 

 of Hydrogen, Y. Schumann, 394. — Measurement of the Rontgen Rays by means 

 of Selenium, F. Himstedt : Effect of the Rontgen Rays and the Becquerel Rays 

 on the Eye, F. Himstedt and W. A. Nagel, 395. 



Geology and Natural History — Eocene and Lower Oligocene Coral Faunas of 

 the United States, T. W. Yaughan, 395. — Presence of a Limestone Conglomer- 

 ate in the Lead region of St. Francis Co., Mo.. F. L. Nason : New Species of 

 Cambrian from Cape Breton, G-. F. Matthew : Geological Survey of Western 

 Australia, A. G. Maitland, 396. — Geology of Texas, F. W. Simonds: Concre- 

 tions from the Champlain Clays of the Connecticut Yalley, J. M. A. Sheldon : 

 Study of the Gabbroid Rocks of Minnesota, A. N. Winchell : Flow of Marble 

 under Pressure, Adams and Nicolson, 397. — Flora of Cheshire, S. Moore: 

 Preliminary list of the Spermatophyta of North Dakota, H. L. Bolley and L. 

 R. Waldron, 398. 



Miscellaneous Scientific Intelligence — New Star in Perseus, T. D. Anderson, 

 399. — National Academy of Sciences : Report of the Secretary of the Smith- 

 sonian Institution for the year ending June 30, 1900, 400. — Memorial of George 

 Brown Goode: U. S. Coast and Geodetic Survey, 401. — La Navigation Sous- 

 marine, M. Gaget: Geological Survey of Great Britain: Geological Survey ol 

 Canada, 402. 



Obituary— Br. Henry A. Rowland: Professor George F. Fitzgerald: Pro- 

 fessor Christian F. Lutken, 402. 



