750 



CATALOaUE AND INDEX OF 



[BULL. 127. 



Petrography — Continued. 



1885. Near forty-ninth parallel west 



of Eocky Mountains, Bauer- 

 man. 



Microscope in geology, Williams, 

 G.H. 



Ueber des Gangrevier von Butte, 

 Mont., Rath. 



Apatite deposits, Ottawa County, 

 Torrance. 



Enlargements of hornblende 

 fragments, Van Hise. 



Microscopic examination of series 

 of sands, Julien and Bolton. 



Crystallines of Minnesota, Win- 

 chell, N. H. 



Syenite and gabbro, Essex Coun- 

 ty, Mass., Wadsworth. 



Junction of Eastern sandstone 

 and Keweenawan, Chamberliu 

 and Irving. 



Hypersthene basalt, Williams, 

 G.H. 



Mineralogy and petrography, 

 Williams, G. H. 



Metamorphosis of gabbro, Wil- 

 liams, G. H. 



Gestein des Cerro de las Navajas 

 in Mexico, Tenne. 



Dikes of apparently eruptive 

 granite near Baltimore, Wil- 

 liams, 6. H. 



AUanite as a constitaent in many 

 rocks, Crosby. 



Zones of silicates in anorthosite 

 rocks on the Saguenay, Adams, 

 F.D. 



1886. Gabbro and associates in Dela- 



ware, Chester. 

 Mamual of lithology, Williams, 



E.H.J. 

 Genesis of the diamond, Diller, 



Lewis, H. C. 

 Examination of crystallines of 



Nova Scotia and Cape Breton, 



Honeyman. 

 Geologic note of excursions, Nova 



Scotia, Honeyman. 

 Variolitic granite from Vermont, 



Kroustschoff. 

 Polarisoopic examination of 



crystallines, Honeyman. 

 Modern petrography, Williams, 



G.H. 

 Inclusions in granite of Crafts- 

 bury, Vt., MoCormick. 



Petrography — Continued. 



1886. Terms applied to metamorphism 



and porphyritic structure, 



Dana, J. D. 

 Polarisoopic examination of rocks 



of Antigonish, Honeyman. 

 Turquoise from New Mexico, 



Clark and Diller. 

 Geological battle of the Com- 



stock. Church, J. A. 

 Sections across New Hampshire 



and Vermont, Hitchcock, C. H. 

 Mount Pitt, Emmons, A. B. 

 Hornblende andesite from Bo- 



gosloff Island, Merrill, G. P. 

 Leadville ore deposits, Colorado, 



Kolker. 

 Origin of ferruginous schists and 



iron ores of Lake Superior, 



Irving, R. D. 

 Origin of schists, etc., of Peno- 



kee-Gogebic series. Van Hise. 

 Archean of Northwest, Irving, 



E.D. 

 Delaware gabbros, etc., Chester. 

 Gabbros and associated rocks near 



Baltimore, WiUiams, G. H. 

 Holyoke trap, Emerson. 

 Montan* eruptives, Lindgren. 

 Penokee-Gogebic rocks,Van Hise. 

 Peridotites near Peekskill, N. Y., 



Williams, G. H. 

 Topaz and rhyolite. Cross. '< 



On ptilolite, Cross and Eakins. 

 Peridotite of Kentucky, Diller. 

 Volcanic rocks of Central Amer- 

 ica, Hague and Iddings. 

 Structure of igneous rocks in 



Orange Mountain, N. J., Id- 

 dings. 

 Geology of Lake of the Woods 



region, Lawton. 

 Analyses [rocks of J Leadville re- 

 gion, Hillebrand. 

 Petrography, Leadville region. 



Cross. 



1887. Rainy Lake region, Lawson. 

 Geological Report, Minnesota, 



Winchell, N. H. 

 Parallel structure, Callaway. 

 Great dike at Paradise, R, I., 



Crosby and Barton. 

 Enlargement of hornblende and 



augite. Van Hise. 

 LitbophysBB and lamination of 



acid lavas, Iddings. 



