Ilfi 
BIBLIOGRAPHY AND INDEX OF N, A. GEOLOGY, [bull. 135. 
Economic geology — Continued. 
Miscellaneous discussions — Continued. 
Classification of economical geological depos- 
its, Crosby, 105. 
Classification of economical geological depos- 
its, Raymond, 474. 
[Genesis of ore deposits], Becker, 20. 
[Genesis of ore deposits], Blake, 28. 
[Genesis of ore deposits], Cazin, 55. 
[Genesis of ore deposits], Church, 68. 
[Genesis of ore deposits], Emmons, 173. 
Genesis of ore deposits, Posepny, 464. 
[Genesis of ore deposits], Rickard, 476. 
[Genesis of ore deposits], "Winchell, H, V.,651. 
[Genesis of ore deposits], Winslow, 657. 
Geological distribution of the useful metals, 
Emmons. 172. 
[Geological distribution of useful metals], 
Church, 67. 
[Geological distribution of the useful metals], 
Winslow, 656. 
Geology of the iron, gold, and copper districts, 
Wadsworth, 598. 
Gold genesis, Wurtz, 676. 
Iron pyrite deposits in Virginia, Nason, 420. 
[Lead and zinc deposits], Nason, 421. 
[Lead and zinc deposits], "Winslow, 655. 
Nature of coal horizons, Keyes, 332. 
Nickel, Cbarleton, 64. 
Origin of anthracite, Keyes, 333. 
Origin of bitumens, Peckham, 442. 
Origiu of the Pennsylvania anthracite, Ste- 
venson, 516. 
Recent discussions in geology, Dawson, 147. 
[Relation of deformation to ore deposition], 
Chamberlin, 60. 
Relation of deformation to ore deposition, 
Kemp, 324. 
Superficial alteration of ore deposits, Pen- 
rose, 452. 
Economic products described. 
Antimony, Crawford, 103. 
Artesian wells, Bain, 11. 
Artesian wells, Cubberly, 113. 
Artesian wells, Dryer, 159. 
Artesian wells, Eldridge, 167. 
Artesian wells, Kennedy, 329. 
Artesian wells, Smith, 519. 
Artesian wells, Todd, 559. 
Artesian wells, Woolman, 667. 
Asbestus, Crawford, 103. 
Asphalt. Crawford, 103. 
Barite, Blake, 26. 
Bauxite, McCalley, 373. 
Bitumen, Crawford, 103. 
Bitumen, Peckham, 442. 
Borax, Crawford, 103. 
Building stones, Crawford, 103. 
Building stones, Gorby, 219. 
Building stones, Eldridge, 167. 
Building stones, Keith, 321. 
Building stones, Nason, 418, 419. 
Building stones, Simonds and Hopkins, 511. 
Building stones, Todd, 559. 
Building stones, Turner, 562. 
Cement, Nason, 419. 
Economic geology — Continued. 
Economic products described — Continued. 
Chromic iron, Crawford, 103. 
Clay, Darton, 134. 
Clay, Emmons, 171. 
Clay, Gorby, 219. 
Clay, Nason, 418,419. 
Clay, Orton, 427, 431. 
Clay, Siebenthal, 509. 
Coal, Bain, 10, 12. 
Coal, Campbell, 49. 
Coal, Crawford, 103. 
Coal, Dawson, 146. 
Coal, Eldridge, 166, 167. 
Coal, Gorby, 219. 
Coal, Hayes, 260, 261, 262, 263. 
Coal, Iddings and Weed, 307. 
Coal, Jones, 318. 
Coal, Keyes, 332, 333a. 
Coal, Orton, 428. 
Coal, Poole, 459. 
Coal, Stevenson, 546. 
Coal, Todd, 559. 
Coal, Turner, 562. 
Coal, Weeks, 618. 
Copper, Cazin, 55. 
Copper, Crawford, 103. 
Copper, Emmons, 172. 
Copper, Keith, 321. 
Copper, Lindgren, 362. 
Copper, Penrose, 452. 
Copper, Posepny, 460. 
Copper, Todd, 559. 
Copper, Turner. 562. 
Copper, Wadsworth, 598. 
Corundum, King, 337. 
Gold, Crawford, 103. 
Gold, DeKalb, 151. 
Gold, Dunn, 163. 
Gold, Eldridge, 167. 
Gold, Emmons, 171, 172. 
Gold, Fairbanks, 187, 189, 193. 
Gold, Hastings, 246, 247. 
Gold, IddiDgs and Weed, 307. 
Gold, Lakes, 348, 
Gold, Lindgren, 362, 363. 
Gold, Lindgren and Turner, 365. 
Gold, McCarn, 375. 
Gold, Penrose, 452. 
Gold, Posepny, 460. 
Gold, Todd, 559. 
Gold, Turner, 562, 565. 
Gold, Wadsworth, 598. 
Gold, Wurtz, 676. 
Graphite, Todd, 559. 
Grindstones, King, 338. 
Gypsum, Crawford, 103. 
Infusorial earth, King, 338. 
Iron, Crawford, 103. 
Iron, Darton, 134. 
Iron, Emmons, 171,172. 
Iron, Hayes, 260, 261, 262, 263. 
Iron, Jennings, 316. 
Iron, Keith, 321. 
Iron, titaniferous, Kemp, 325. 
Iron, Kennedy, 330. 
