CONTENTS. 



Pago. 



Art. XXVII — The relation between Wind Velocity and 



Pressure ; by H. Allen Hazen 241 



XXVIII. —Is there a Huronian Group? by R. D. Irving... 249 



XXIX. — Oxygen in the Sun ; by J. Trowbridge and C. C. 

 . Hutchltsts 263 



XXX. — Bismutosphserite from Willimantic and Portland, 



Conn.; by H. L. Wells 271 



XXXI. — Note on some remarkable Crystals of Pyroxene 



from Orange County, N. Y.; by G. H. Williams 275 



XXXII. —The Flow of Solids ; by W. Hallock 277 



XXXIII. — Analyses of some Natural Borates and Borosili- 



cates ; by J. E. Whitfield 281 



XXXIV. — The Texas Section of the American Cretaceous ; 



by R. T. Hill 287 



XXXV.— Notice of New Fossil Mammals ; by O. C. Marsh 323 



SCIENTIFIC INTELLIGENCE. 



Physics and Astronomy. — Papers in Armalen der Plrysik und Chernie, No. 8 b , for 

 188*7, 309. — The production, properties and uses of very fine threads, Boys: 

 Photography by Vital Phosphorescence, Vansant, 31 L. — Annual Reports of the 

 Board of Directors of the Chicago Astronomical Society : Annals of the Harvard 

 College Observatory, Pickering: Resultados del Observatorio Nacioual Argen- 

 tine) en Cordoba durante la direcion del D or B. A. Gould ; Juan M. Thome, 

 Director, 312. 



Geology and Mineralogy. — Damming and erosion by Greenland ice, Marr, 312. — 

 Variations in water-level in enclosed Seas, Suess. 313. — Uuconformability be- 

 tween the Animikie and the Vermilion Series, Winchell: Catalogue of the 

 Fossil Mammalia in the British Museum, Lydekker, 314. — Mineral Localities 

 in the Western United States, 315. 



Miscellaneous Scientific Intelligence. — British Association, 315. — Memoirs of the 

 National Academy of Sciences, Vol. Ill: Smithsonian Institution and the 

 Fish Commission, 319. — Obituary. — Spencer Fullerton Baird, 319 — Alvan 

 Clarke, 322. 



ERRATA. 



Vol. xxxiv, page 227, hue 12 from top, for Morehead read Moreland; line 

 30, for single read simple; line 32, for required read acquired. 



