— 451 - 



ton Oolitic Irou Ores. — E. W. Wood : Effects of Pressure ou Ice. — 

 W. Upham : Keview of the Quaternary Era, with special refereuce to the 

 Deposits of Flooded Eivers. — A. M. Mayer: Illuminating power of Fiat 

 Petroleum Flames in various azimuths; — 'Physical Properties of Hard- 

 Eubber, or Volcanite. — V. Piersson : Some remarkably developed Calcite 

 Crystals. — 0. C. Marsh: Horned Artiodactyle (Protoceras celer) from 

 the Miocene. 



Februar 1891. No. 242. — W. P. Headden: Columbite and Tanta- 

 lite from the Black Hills of South Dacota, — S. L. Penfield ; Chemical 

 Composition of Aurichalcite. — C. E. yan Hise : Attempt to harmonize 

 some apparently conflicting Views of Lake Superior stratigraphy. — 

 W. H. Melyille: Povellite-Calcium Molybdate. A new Mineral Species. 

 — F. Waldon: Brückner' s Klimaschwankungen. — 0. C. Marsh: Gigan- 

 tic Ceratopsidae or horned Dinosaurs of North America. 



11) Transactions of the American Institute of Mining En- 

 gine er s. New York 0. 8°. [Jb. 1890. I. -388-.] 

 Vol. XVII. 1890. — J. T. B. Iyes: An Occurrence of Copper Glance, 

 North of Lake Huron. 72. — E, A. Bergier : An Improved French Pocket- 

 Compass. 97. — T. E. Schwarz: The Ore-Deposits of Ked Mountain, 

 Ouray County, Colorado. 139. — K. A. Blow: The Geology and Ore-De- 

 posits of Iron Hill, Leadville, Colorado. 145. — E. Gilpin Jr. : The Geo- 

 logical Relations of the Principal Nova Scotia Minerals. 199. — J. C. F. 

 Randolph : Notes on the Eepublic of Columbia, S. A. 205. — C. W. Goo- 

 dale : Concentration before Amalgamation for Low-Grade , Partially De- 

 composed Silver-Ores , with Notes on the Geology of the Flint Creek Mi- 

 ning District. 242. — E, Chauyenet : The Iron Resources of Colorado. 

 266. — W. E. Newberry : Notes on the Geology of Aspen Mining Di- 

 strict. 273. — E. D. Peters Jr. : The Sudbury Ore-Deposits. 278. 

 Ch. A. Ashburner : Natural Gas Exploration» in the Eastern Ontario 

 Peninsula. 290. — W. H. Merrit : Notes on some Goals in Western Ca- 

 nada. 313. — E. W. Ells : The Mining Industries of Eastern Quebec. 

 316. — W. H. Fürlonge : Notes on the Geology of the De Kaap Gold- 

 Fields in the Transvaal. 331. — S. F. Emmons : Notes on the Gold-De- 

 posits of Montgomery County, Maryland. 391. — G. Macfarlane : Notes 

 on American Cannel Coal. 436. — E. Pearce : The Association of Gold 

 with other Metals in the West. 447. — W. P. Blake: Wurtzilite from 

 the Uintah Mountains, Utah. 497. — H. M. Chance: The Bush Creek, 

 Arkansas, Zink-District. 505. — W. P. Blake: üintaite , Albertite, Gra- 

 hamite and Asphaltum, Described and Compared, with Observations on 

 Bitumen and its Compounds. 563. - - B. E. Fernow : Awalanches. 583. — 

 F. H. McDowell: Stripping Ore-Deposits. 627. — W. M. Cocrtis : Gold 

 Quartz. 639. — H. W. Adams: Liste of Coinmercial Phosphates. 649. — 

 H. M. Chance : Geology of the Choctaw Coal-Field. 653. — J. Birkinbine : 

 Crystalline Magnetite in the Port-Henry, New York, Mines. 747. — Ch. W. 

 Goodale : The Occurrence and Treatment of the Argentiferous Manganese- 

 Ores of Tombstone District, Arizona. 910. 



