DABION.] 



NORTH AMERICAN GEOLOGY. 



749 



Petrography— Continued. 

 1884, Fulgurite from Mount Thielson, 

 Diller. 



Rock outcrops in central Minne- 

 sota, Upham. 



Rocks and ores of Notre Dame 

 Bay, Newfoundland/' Wads- 

 worth. 



So-called quartz porphyry at 

 Hollins, Md., Williams, 6. H. 



Observations'iii Mount Katahdin 

 district, Hamlin. 



Azoic system and its subdivisions, 

 Whitney and Wadsworth. 



Petrography of fortieth parallel 

 survey, Zirkel. 



Hyperstheue andesite and tri- 

 clinic pyroxene. Cross; 



Ueber Gestein von Labrador, 

 Wichmann. 



Silicates about olivine in anortho- 

 sites from ' River Saguenay, 

 Adams, F. D. 



Volcanic rocks of Great Basin, 

 Hagae and Iddings. 



Enlargements of feldspar in Ke- 

 vfeena-wan sandstones, Van 

 Hise. 



Report on Lake Superior region. 

 Hall, C. W. 



Geology of Hawaiian Islands, 

 Button, C. E. 



Washingtombuilding stones, Mer- 

 rill, G. P. 



Cortland and Stony Point hom- 

 blendic and augite rock; Dana, 

 J.D. 



Building stones of United States, 

 Hawes. 



Lithology of District of Colum- 

 bia, Merrill, 6. P. 



lUustrationsof polished rock sur- 

 faces, Morgan, H. J. 



Olivine rocks of North Carolina, 

 Wadsworth. 



Serpentine in Chester County, 

 Pa., Prazer. 



Microscopic structure of building 

 stones, Hawes, Merrill, G. P. 



Felsites arid associates north of 

 Boston, Diller: 



Iron re'gion^of northern Minne- 

 sota, Chester,' A. H. 



Copper and iron districts of Lake 

 Superior, Wadsworth. 



United States geologists and the 

 propylite question, Wadsworth. 



Petrography — Continued. 



1884. Report of the United States Geo- 



logical Survey, andesites, 



Hague, A. 

 Fulgurite from Oregon, Diller. 

 Studies of rooks of Cordilleras, 



Wadsworth. 

 Sanidine, etc., in nevadite of 



Chalk Mountain, Colo., Cross. 



1885. Trap dike across southeastern 



Pennsylvania, Lewis, H. C. 



AUanite as a rock constituent, 

 Iddings and Cross. 



Reconnaissance into Pope 

 County, Minn., Winohell, N. H. 



Hague and Iddings on Comstook 

 lode, Raymond. 



Notes on stratigraphy of Califor- 

 nia} Becker. 



Igneous rocks of Washoe, Nev., 

 Hague and Iddings." ' 



Volcanic' dust, Nebraska, Merrill, 

 G.P. 



Survey of Delaware Comity, Pa., 

 HaU, C. E. 



Metamorphism in Rhode Island 

 coal measures, Dale. 



Contributions to mineralogy of 

 Rocky Mountains, Cross and 

 Hillebrand. 



Gestein vom Washington Terri- 

 tory, Oebbeke. 



Enlargement of fragments in cer- 

 tain rocks,' Irving and Van 

 Hise. 



Nephelingestein in den Vereinig- 

 ten Staaten, Wolflf. 



Apatitbringer in Canada, Adams, 

 F. D. 



Canadian Arohean and Irish 

 metamorphics, Kinahan, G. H. 



Great trap dike across southeast- 

 ern Pennsylvania, Lewis, H. C. 



Geotegy of mouth of Narragan- 

 sett Bay, Dale. 



Arohean of the Northwest, Irv- 

 ing, R. D. 



Interior of Gasp^ peninsula. Ells, 

 Low. 



Lava from Bogosloflf, Diller. 



Archean rooks of New Jersey, 

 Britton. 



York and Carleton counties. New 

 Brunswick, Bailey, L. W. 



Report on northern Cape Breton, 

 Fletcher. 



