CONTENTS 



Page. 



Art. XIX. — Notes on the Geology of Florida; by William 



H. Dall ..." .. 161 



XX. — Notes on the Deposition of Scorodite from Arsenical 

 Waters in the Yellowstone National Park ; by Arnold 

 Hague 171 



XXI. — The Effect of Magnetization on the Viscosity and 



Rigidity of Iron and of Steel; by C. Bartjs 175 



XXII. — Fauna of the "Upper Taconic" of Emmons, in 

 Washington, County, N.Y. With Plate I. By Charles 

 D. Walcott 187 



XXIII. — On the amount of Moisture remaining in a Gas 

 after drying by Phosphorus Pentoxide ; by Edward 

 W. Morley 199 



XXIV.— Is there a Huronian Group ? by R. D. Irving 204 



XXV. — Ovibos Cavifrons from the Loess of Iowa; by 



W. J. McGee ._ 217 



XXVI. — On the Chemical Composition of Howlite, with a 

 note on the Gooch method for the determination of 

 boracicacid; by S. L. Peneield and E. S. Sperry... 220 



SCIENTIFIC INTELLIGENCE. 



Chemistmj and Physics. — On a Vapor-Calorimeter, Bunsen: On the density of 

 liquid Methane, Oxygen and Nitrogen, Olszewskt: On the experimental dem- 

 onstration of Avogadro's Hypothesis, Schall, 224. — On the Evolution of Sul- 

 phurous oxide and of Oxygen in Kipp's Apparatus, Neumann : On the Vapor- 

 density of Tellurium tetrachloride and on the Valence of Tellurium, Michaelis, 

 225. — On Diamide (Hydrazine), Curtius, 226. — Method of observing the ac- 

 tion of Magnets on Liquids, S. T. Morehead: Comparison of the radiations 

 from melting platinum and silver, J. Voille : Solidification of liquids by 

 pressure, E. H. Ajiagat, 227. — The Conductibility for heat of Bismuth in 

 the magn&iic field, A. Righi: Size of the Silver Molecule, 0. Wiener: Changes 

 in the Ohm, Himstedt: The Chemistry of the Sun, J. Norman Lockter, 228. 

 — Joint Scientific Papers of James Prescott Joule, 229. 



Geology and Mineralogy. — Note on the Characters and Mode of Formation of the 

 Coral Reefs of the Solomon Islands, being the results of Observations made in 

 1882-84, H. B. Guppy. 229. — Explorations in Florida, Angelo Heilprin, 230. 

 — The summit-plates in Blastoids, Crinoids and Cystids and their Morpholog- 

 ical relations, Charles Wachshutii and Frank Springer : Cliftonite, a cubic 

 form of graphitic carbon, Fletcher, 232. 



Miscellaneous Scientific Intelligence. — The Height of Summer Clouds. Ekholm and 

 Hagstrom, 233. — American Association for the Advancement of Science, 234. 



Obituary. — Spencer F. Baird, 240. 



