IV CONTENTS. 



NUMBER CLXXXII. 



Page 



Akt. VII. — The Story of Biela's Comet; by H. A. Newton, 81 

 VIII. — Relation between Direct and Counter Electromotive 

 Forces represented by an Hyperbola; by H. S. Car- 

 hart, — 95 



IX. — Tendril Movements in Cucurbita maxima and C. Pepo; 



by D. P. Penhallow, 100 



X. — A Theorem of Maximum Dissipativity ; by G. F. Becker, 115 

 XI. — A new Law of Thermo-Chemistry ; by G. F. Becker,. 120 

 XII. — Recent Explorations in the Wappinger Valley Lime- 

 stone of Dutchess Co., X. Y., Xo. 5; by W. B. Dwight. 



With Plate VI, 125 



XIII.— Wind Action in Maine ; by G. H. Stone, 133 



XIV. — The Westward Extension of Rocks of Lower Helder- 



berg Age in New York ; by S. G. Williams, 139 



XV. — Meteoric Iron from West Virginia ; by G. F. Ktnsrz, .. 145 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics. — Separation of Liquefied Atmospheric Air into two 

 layers, Wroblewski, ]48. — Velocity of the Explosive wave in Liquid and 

 Solid Detonauts, Berthelot, 149. — Visible representation of the Ultra-red 

 Rays, Lommel, 150. — Improved Method of preparing Nitrogen dioxide, Kaem- 

 merer : Action of Carbon monoxide and the vapor of Water at high Tempera- 

 tures, Natjmann and Pistor, 151. — Atomic weight of Cerium, Brauner, 152. — 

 Synthesis of Cocoaine and its Homologues, Merck : Electrostatic Battery, 

 Dajiien: Handbook of technical Gas- Analysis, 0. Winkler and G- Lunge, 153. 

 — Alternating Currents of Electricity. T. EL Blakeslet, 154. 



Geology and Natural History. — Dr. Frazer's Report on the International Geologi- 

 cal Congress, 154. — Cretaceous of Northwestern Canada, Dawson: Journal 

 and Proceedings of the Royal Society of New South Wales for 1884, 155. — Fos- 

 sil Insects of the " Primary" (Paleozoic) rocks, C. Brongniart : The Determin- 

 ation of Rock-forming Minerals, E. Hussak and E. G. Smith, 156. — Manual of 

 American Land Shells, W. G. Binnet: Plasmolytic Studies, H. de Vries, 157. 

 — Histoire des principales Varietes et Especes de Vignes d'origine Americaine 

 •qui resistent au Phylloxera, A. Millardet: Flora Brasiliensis, Eichler, 158. 

 — Botanical Work of the Rev. Moses A. Curtis, T. F. Wood, 159. 



Miscellaneous Scientific Intelligence. — The Apparent Position of the Zodiacal Light, 

 A. Searle, 159. — International Exhibition of Implements against Cryptogams 

 and Parasites, 160. 



