xu 



Page 

 Geology of country traversed 

 by Northern Pacific 



Railroad 56 



of Porcupine Mountains. 14 

 of vicinity of Golden, Col, 77 



of Yellowstone Park 34 



Georgia, minerals from 13 



Geysers of Yellowstone Park. 7 

 Gibsonville, N. C., supposed 



emerald 12-13 



Glacial boulders in the Great 



Hudson Valley 24-26 



epoch and subsequent 



warmth 9-2-93 



epoch in North America. 102 

 erosion in North America 



51-52 



gravels at Trenton 7-12 



phenomena at Ontonagon 14 

 striae on Shawangunk 



Mountain 27-28 



Glaciation of the Shawangunk 



Mountain 22-30 



Glacier-ice, erosive power of. 



51-52 

 Glen Cove, N. Y., leaf-bear- 

 ing sandstones 30-3 1 



Gletscher Milch, produced by 



erosion 52 



Golden, Col., geology of 77 



Grange associations, scientific 



influence 16 



Graphite 2, 50 



Gravels at Trenton, imple- 

 ments found in 7-12 



Greenland, minerals from . . . 104 

 Green River, Col., Eocene 



limestone at 13 



GuYOT, Arnold, hfe of . . .66-68 

 Gypsum 19 



Hartford, Conn., gasteropods 



in streets of 20 



Head of sandstone from 



Staten Island 81 



Herderite 37 



Hiddenite 38 



High Point, N. Y., lake at. . . 29 

 Honey-ants of New Mexico. . 103 

 comb, artificial formation j 



of 107-108 



Honorary members, list. . 123-125 I 



Pagb 

 Houghton, Mich., ancient 



mining excavations at. 14 

 copper ores i 



Hudson Valley, boulders in. 24-26 



Humboldtilite in slag 104 



Hungary, minerals from 104 



Huron shale of Ohio, contain- 

 ing Dinichthys 20 



Hydraulics of the Mississippi. 



82-83 



Ice-caves in the Shawangunk 



Range 23 



erosive power of 5^-52 



movement, direction of. . 24 



Idaho, minerals from 2, 72 



Implements of argillite 9 



of flint at Amiens 80 



Indian arrow-heads near Tren- 

 ton 8 



arrow-heads in Oregon.. 63 

 mythology of Sacramento 



Valley 55 



Indurated shales at Bergen 



Hill, N.J 7 



Insects, fossil, at Florissant. . 13 

 specialization of sex in . . . 103 

 Inundations of the Mississippi 



basin 82-83 



Iron wire, curious corrosion of.65-66 



Jade ornaments from Ober- 



stein 62 



Jebel Nakous, sonorous sand- 

 hill 98-99 



Joints in the Shawangunk con- 

 glomerate 23 



Kauai, sonorous dune 98 



Krakatoa, distribution of vol- 

 canic dust of. .60-61, 64-65 

 microscopic examination 



of ash 14, 63-64 



Kyanite in mica schist 22 



Lake Champlain, colored mar- 

 bles 100 



at High Point, N. Y 29 



Moeris, Egypt, survey at. 78-79 

 Mohonk and Minnewas- 



ka, N. Y 27-30 



Nicaragua, species of 

 skate in 38 



