weeks.] PALEONTOLOGY, PETROLOGY, AND MINERALOGY, 1894. 117 
Economic geology — Continued. 
Economic products described — Continued. 
Iron, Lindgren, 362. 
Iron, Penrose, 452. 
Iron, Posepny, 460. 
Iron, Smyth, 526. 
Iron, Spurr, 539, 540. 
Iron, Todd, 559. 
Iron, Turner, 562. 
Iron, Wadsworth, 598. 
Iron, Wolff, 659. 
Irrigation, Newell, 424. 
Lead, Blake, 28, 30. 
Lead, Crawford, 103. 
Lead, Enmions, 172. 
Lead, Jenney, 315. 
Lead, Nason, 421. 
Lead, Penrose, 452. 
Lead, Posepny, 460. 
Lead, Simonds and Hopkins, 511. 
Lead, Todd, 559. 
Magnesite, Crawford, 103. 
Manganese, Crawford, 103. 
Manganese, Emmons, 172. 
Manganese, Penrose, 452. 
Manganese, Todd, 559. 
Marble, Dartou, 134. 
Marble, McCallie, 374. 
Marble, Smytli, C. H., jr., 526. 
Marcasite, Blake, 26. 
Mica, Todd, 559. 
Natural gas, Crawford, 103. 
Natural gas, Gorby, 219, 
Natural gas, Jordan, 320. 
Natural gas, Orton, 430. 
Nickel, Bush, 43. 
Nickel, Cbarleton. 64. 
Nickel, Emmons, 172. 
Nickel, Todd, 559. 
Nickel, Walker, 610. 
Petroleum, Crawford, 103. 
Petroleum, Eldridge, 167. 
Petroleum, Gorby, 219. 
Petroleum, Peckham, 443. 
Phosphate, Phillips, 453, 454. 
Phosphate, Safford, 483. 
Platinum, Crawford, 103. 
Pumice, King, 338. 
Quicksilver, Crawford, 103. 
Quicksilver, Emmons, 172. 
Quicksilver, Fairbanks, 193. 
Salt, Crawford, 103. 
Salt, Luther, 368. 
Silver, Comstock, 91. 
Silver, Crawford, 103. 
Silver, Emmons, 171, 172. 
Silver, Lakes, 348. 
Silver, Lindgren, 363. 
Silver, Penrose, 452. 
Silver, Posepny, 460. 
Silver, Todd, 559. 
Soda, Crawford, 103. 
Talc, Smyth, 526. 
Tin, Emmons, 172. 
Tin, Todd, 559. 
Wolfram, Gurlt,230. 
Economic geology — Continued. 
Economic products described — Continued. 
Zinc, Blake, 26, 28, 30. 
Zinc, Case, 54. 
Zinc, Crawford, 103. 
Zinc, Emmons, 172. 
Zinc, Jenney, 315. 
Zinc, Kemp, 326. 
Zinc, Leonhard, 357. 
Zinc, Nason, 421. 
Zinc, Penrose, 452. 
Zinc, Simouds and Hopkins, 511. 
Florida. 
Cenozoic geology along the Apalachicola 
River, Dall and Stanley-Brown, 125. 
Florida kaolin deposits, Memminger, 411. 
Vicksburg Eocene and Chattahoochee Mio- 
cene, Foerste, 198. 
Georgia. 
Bauxite mining, McCalley, 373. 
Cenozoic geology along the Apalachicola 
River, Dall and Stanley Brown, 125. 
Corundum deposits of Georgia, King, 337. 
Geological and topographical features about 
Atlanta, Purington, 468. 
Geology of Coosa Valley, Hayes, 258. 
Marbles of Georgia, McCallie, 374. 
Natural and artificial abrasives, King, 338. 
Ringgold folio, Hayes, 260. 
Vicksburg Eocene and Chattaohoochee Mio- 
cene, Foerste, 198. 
Glacial geology. 
Alaska. 
Mammoth remains in the Yukon district of 
Canada and Alaska, Dawson, 141. 
[Mammoth remains of Canada and Alaska], 
Howortli,294. 
Canada. 
Ancient strait at Nipissing, Taylor, 555. 
Inter-Glacial fossils from the Don Valley, 
Coleman, 89. 
Limit of post-Glacial submergence, Taylor, 
554. 
Mammoth remains in the Yukon district of 
Canada and Alaska, Dawson, 141. 
Pleistocene of the Northwest Territories, 
Tyrrell, 568. 
Pre-Paleozoic decay of crystalline rocks, Bell, 
23. 
Tertiary baseleveling, Upham, 578. 
Colorado. 
Description of the Elk Mountains, Emmons, 
171. 
Greenland. 
Glacial studies in Greenland, Chamberlin, 58. 
Illinois. 
Superglacial eskers in Illinois, Upham, 579. 
Indiana. 
Drift of the Wabash-Erie region, Dryer, 
161. 
Geology of Lagrange County, Dryer, 160. 
Geology of Noble County, Dryer, 159. 
Minnesota. 
Conditions of ripple marks, Joggar, 317. 
False bedding, Spurr, 542. 
Geology of Itasca County, Culver, 115. 
