daeTon.J' 



NORTH AMERICAN GEOLOGY. 



745 



Petrography— Continued. 



1875. Geology of portions of Colorado 



surveyed in 1873, Stevenson. 

 Thin sections of Paleozoic and 



Mesozoio rocks of Pennsyl- 

 vania, Frazer. 

 Trap rocks of Connecticut Valley, 



Hawes. 

 Notes on' eastern Massachiisetts, 



Dodge. ■ 

 Mines and geology of San Juan 



County, Endlich. 

 Eepbrt ou Utah, Nevada, Arizona, 



and New Mexico, Howell, 



E.E. 

 Report from St. Georg(),Utah,to 



Gila Eiver, Mar vine;' 

 Structure of York Valley lime- 



stolles, PennSj'l'vania, Frazer. 

 Character of slates' at their out- 



orop,'Prazer. 

 Primordial strata of Virginia, 



Fontaine. 

 Geology of the Blue Eidge, Fon- 



taihe. 



1876. Sections of traps; Frazer. 

 Eeport of San Juan division, sur- 

 vey of Colorado, Endlich. 



Microscopic petrography, survey 

 of fortieth parallel, Zirkel. 



Trap of York: and" A daims coun- 

 ties, Pennsylvania, Frazer. 



Geology between "Leaiven worth 

 and the Sierra Nevada, Engle- 

 mann. 



Younges fc Hiironiiin south of Lake 

 Supeiior and age' of copper 

 series. Brooks.' 



Eeport of middle division of sur- 

 vey Of Colorado, Peale. 



Notes on two traps, Frazer. 



GrrieBBtones and' their' organic 

 remiairi's' of ' New ' Hampshire, 

 Hawes; ' 



Huronian rocks south' of Lake 

 Superior, Brooks. 



Certain trap' rocks from Brazil, 

 FraSier. 



Notes on Canadian minerals and 

 rocks, Harrington, B. J. 



Chlorltic formation westof New 

 Haven region, Hawes.'' 



Youngest' Huronian roCks^ south 

 of Lake Superior, IrVing, E. D. 



Notes on northern Wisconsin, 

 Sweet. 



Petrography — Continued. 



1876. Kaolin in Wisconsin, Irving, 



E.D. 



On geologic map of Massachu- 

 setts, Crosby. 



Esploraftons in British Colum- 

 bia, Eichardson, J. 



Eeport on southeastern Califor- 

 nia region, Loew. 



Chemical contributions to geol- 

 ogy of Canada; Hoffmani 



Geology of the Nashua Valley, 

 Burbank. 



1877. Descriptive geology, fortieth par- 



allel ' survey, Hague and Em- 

 mons. 

 Lithology, Wisconsin survey, 



Wright, C. E.' 

 Lithology of AdirdMabks, Leeds. 

 Geology of central Wisconsin, 



Irving, E. D. 

 Krystallinisohe Gfestcin Von Min- 

 nesota, Strong and Kloos. 

 In'trusives of Heilry McSuutains, 



Dutton, C. E. 

 Geol6gy of New' Hampshire, 



Hitchcook,"C.H. ; Huntington. 

 Explorations ■^in'i Cape' Breton, 



Fletcher. 

 Lithology of 'soUtheni Colorado 



and'- northern New 'Mexico, 



Conkling. 

 Garnets in trap bf New'Haven, 



Dana, E. S. 

 Igneous Todks of 'York County, 



Pa., Frazer. 

 Metallic iron in dolerites. New 



Haiitpshtre, Hawes.' 

 Explorations between James Bay 



and Lakes Superior and'Huron, 



Bell. 

 Greenstones 'of westerii Cornwall, 



Phillips, Dan!a; J. D. 

 Geology of ' Kergliieleh Island, 



Endlich and Kidder." 

 Petrography by F. Zirkel> Dana, 



J. D; 

 Geology of New Hampshire, by 



C. H. -Hitchcock, 'Daiiayj. D. 

 Helderberg' of Beraardston and 



Verhon; Dana, J. D. 

 1878. Min«ral6gy and lithology of New 



Hampshire, Hawefe,^E. 

 Mineralogy and petrography of 



Boston" and vicintty. Wads- 

 worth. 



