IV CONTEXTS. 



Number 122. 



Page 

 Art. VI.— Wollastonite and Pseudo-Wollastonite ; by E. T. 

 Allen and W. P. White, with optical stud} 7 by F. E. 

 Wright " - 89 



VII. — Studies on Early Stages in Paleozoic Corals; by C. E. 



Gordon 109 



VIII. — The Behavior of Ferric Chloride in the Zinc Redac- 

 tor ; by D. L. Randall 128 



IX. — Dipnoan Affinities of Arthrodires ; hj C. R. Eastman 131 



X. — A New Name for the Dinosaurian Genus Ceratops ; bv 



R. S. Lull 1 144 



XI. — Interlocking- of Emarginate Primary Feathers in Flight; 



by C. C. Trowbridge 145 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Determination of Nitrons and Nitric Acids, Weisen- 

 heimer and Heim : Modifications of Antimony, Stock and Siebert, 170. — 

 Quantitative Determination of Bismuth, Staehler and Schaffenberg : 

 Distillation of Gold, Moissan, 171. — Fluoride of Bromine, Lebeau : Prop- 

 erties of the «-Rays from Radium, E. Rutherford : Emission Spectrum 

 of the Auer burner, H. Rubens, 172. — Afterglow produced by Lightning 

 Discharges, B. Walter : Specific Heat of Superheated Steam, L. Rubens 

 and F. Henning : Use of the Microphone Contact for Telegraphic Relays, 

 and for Detection of Weak Currents, C. Jensen and H. Sieveking, 173. — 

 Mathematical and Physical Papers, G. G. Stokes : Lehrbuch der Physik, 

 O. D. Chwolson : Polariscope in the Chemical Laboratory, G. W. Rolfe, 

 174. 



Geology and Mineralogy — Status of the Mesozoic Floras of the United States 

 (Second Paper), L. F. Ward, 175. — Geology and Paleontology of the 

 Judith River Beds, T. W. Stanton and J. B. Hatcher, 177. — Paleontology 

 of the Malone Jurassic Formation of Texas, F. W. Cragin, 179. — Copper 

 Deposits of Missouri, H. F. Bain and E. O. Ulrich : Developmental Stages 

 in the Lagenidae, J. A. Cushman, 180. — Revised Nomenclature of the Ohio 

 Geological Formations, C. S. Prosser : Mesozoic Section on Cook Inlet 

 and Alaska Peninsula, T. W. Stanton and G. C. Martin : New York State 

 Museum, J. M. Clarke : Geology of Miller County, S. H. Ball and A. F. 

 Smith : Quarrying Industry of Missouri, E. R. Buckley and H. A. Bueh- 

 ler : Geology of Moniteau County, F. B. Van Horn and E. R. Booklet : 

 Note on the use of Buena Vista as the name of a geological terrain, C. S. 

 Prosser, 181. — Configuration of the Rock Floor of Greater New York, W. 

 H. Hobbs : Formation of Phenocrysts in Igneous Rocks, H. A. Miers, 182. 

 — Beitrage zur chemischen Petrographie, A. Osann, 183. — Beitrage zur 

 Petrographie des westlichen Nord-Gronland, M. Belowsky : Recherches 

 geologiques et petrographiques sur les Laccolithes Environs de Piatigorsk 

 (Caucase du Nord), V. de Derwies, 184. — Physikalische Krystallographie 

 und Einleitung in die krystallographische Eenntnis der wichtigsten Sub- 

 stanzen, P. Groth, 185. — Preliminary Notice of a New Meteorite from 

 Texas, K. S. Howard : Mineralogical Survey of Ceylon, Report for 1904, 

 K. Coomaraswamy, 186. — Production of Precious Stones in 1904, G. F. 

 Kunz, 187. — Celestite in Canada, H. Lampard, 188. 



Miscellaneous Scientific Intelligence — American Association : Ostwald's Klas- 

 siker der exakten Wissenschaften, 188. 



