VI CONTENTS. 



NuidIkm' 226. 



Page 



Art. XXXYII. — Origin of Normal Faults and of the Struct- 

 ure of the Basin region ; by J. LeConte 257 



XXXVIII. — Circular Polarization of certain Tartrate Solu- 

 tions, II ; by J. H. Long 264 



XXXIX. — Gustatory Organs of the American Hare, Lepus 



Americanus ; by F. Tuckerman 27V 



XL. — Output of the Non-condensing Steam Engine, as a 



Function of Speed and Pressure ; by F. E. Nipher 281 



XLI. — Ratio of the Electromagnetic to the Electrostatic 

 TJnit of Electricity ; by H. A. Rowland, with the assist- 

 ance of E. H. Hall and L. B. Fletcher . 289 



XLII. — Determination of v, the ratio of the Electromagnetic 



to the Electrostatic Unit ; by E. B. Rosa 298 



XLIII. — Some suggestions upon the method of grouping the 

 formations of the middle Cretaceous and the employ- 

 ment of an additional term in its nomenclature ; by G. 

 H. Eldridge 313 



XL1V. — Some Florida Miocene; by D. W. Langdon, Jr. __ 322 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics. — Heat of Combustion of Carbon, Berthelot and Petit, 

 324. — Molecular Mass of Dissolved Substances, Will and Bredig, 325. — 

 Boiling point of Ozone and the Solidifying point of Ethylene, Olzewski, 326. 

 — Constitution of the Thionic acids, Berthelot, 327. 



Geology and Mineralogy. — Geological Society of America: North American 

 Geology and Palaeontology, S. A. Miller, 328. — Note on the composition of 

 Uraninite. W. F, Hillebrand : Minerals from Franklin, N. J., G. A. Koenig, 

 329. 



Miscellaneous Scientific Intelligence. — Parallaxes of the fixed stars, 329. — American 

 Association for the Advancement of Science, 331. 



Obituary. — Giuseppe Meneghini, George H. Cook, 336. 



Errata. 



Pages 323, 324, for Sumpter, read Sumter. 

 Page 329. line 20, for N0 2 read U0 2 . 



