CONTENTS. 



Number 63. 



Page 

 Art. XIII. — Circular Magnetization and Magnetic Permea- 

 bility ; by J. Trowbridge and E. P. Adams _. 175 



XIV. — Notes on the Geology of Parts of the Seminole, 



Creek, Cherokee and Osage Nations ; by C. N. Gould 185 



XV. — Names for the formations of the Ohio Coal-measures ; 



by C. S. Prosser 191 



XVI. — New American Species of Amphicyon ; by J. L. 



Wortman 200 



XVII.— Studies in the Cyperacese, No. XV ; by T. Holm . . 205 



XVIII. — Just Intonation Piano ; by S. A* Hageman 224 



XIX. — Very on Atmospheric Radiation; by W. Hallock . 230 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Radio-active Lead, Hofmann and Strauss : Physiolog- 

 ical Action of Radium Rays, Walkhoff: Chlorine Heptoxide, Michael and 

 Conn, 235. — Non-Existence of Trivalent Carbon, J. F. Norris: Diffusion of 

 Gold in Solid Lead at Ordinary Temperature, W. C. Roberts- Austin: Cerium, 

 G. B. Drossbach: Method for Crystallizing Substances without the Formation 

 of Crusts upon the Surface of the Liquid, A. Wroblewski, 236.— Velocity of 

 the ionized phosphorus emanation in the absence of electric field, C. Barus: 

 Thermo-chemistry of the alloys of copper and zinc, T. J. Baker, 237. — Decre- 

 ment of electrical oscillations in charging condensers, A. F. Sundell and Hj. 

 Tallquist : Effect of a magnetic field on the discharges through a gas, R. S. 

 Willow: Conductivity produced in gases by the motion of negatively charged 

 ions. Townsend, 238. — Recueil de Donnees Numeriques publie par la Societe 

 Francaise de Physique, H. Dufet: One Thousand Problems in Physics, W. H. 

 Snyder and I. 0. Palmer, 239. 



Geology and Mineralogy — Maryland Geological Survey : Allegheny County, W. B. 

 Clark: U. S. Geologial Survey, C. D. Walcott, 240. — Geological Survey of 

 Michigan, A. C. Lane, 241. — Geological and Natural History Survey of Minne- 

 sota, N. H. Winchell: Pleistocene Geology of the South Central Sierra Nevada 

 with especial reference to tbe Origin of Yosemite Valley, H. W. Turner. 242. 

 — Geologisches Centralblatt: Metasomatic Processes in Fissure Veins, W. Lind- 

 gren, 243. — Some Iowa Dolomites, N. Knight, 244. — Minerals of Ontario: 

 Text-book of Important Minerals and Rocks, with tables on the determination 

 of minerals, S. E. Tillman: Los Minerales, G. Bodenbender, 246. 



Botany — Monograph of the North American Umbelliferse, J. M. Coulter and J. 

 N. Rose, 247. — Foundations of Botany, J. Y. Bergen, 248.— Flora of Vermont: 

 Catalogue of the African Plants collecGed by Dr. Friedrich Welwitschin 1853-61. 

 "W. P. Hiern, 249. — Botany: an Elementary Text for Schools, L. H. Bailey: 

 Plant Life and Structure, E. Dennert, 250. 



Miscellaneous Scientific Intelligence — Comparative Physiology of the Brain and 

 Comparative Psychology, J. Loeb: Microbes et Distillerie, L. Levy: Gesang 

 der Vogel, seine anatomischen und biologischen Grundlagen, V. Hacker, 251. 

 — O. S. U. Naturalist : Ostwald's Klassiker der Exakteu Wissenschaften ; 

 Director-General of the Geological Survey of the United Kingdom, 252, 



