weeks.] PALEONTOLOGY, PETROLOGY, AND MINERALOGY, 1901. 113 
Economic products described — Continued. 
Asphalt, Eldridge, 255. 
Asphaltum, mineral pitch, Merrill, 545. 
Barite; heavy spar, Merrill, 545. 
Bauxite, Hayes, 356. 
Bauxite, Merrill, 545. 
Bauxite, Watson, 788. 
Bitumen, Peckham, 591. 
Boracite or stassf urtite ; borate of magnesia, 
Merrill, 545. 
Borax or tineal; borate of soda, Merrill, 545. 
Braunite, Merrill, 545. 
Buhrstone, Merrill, 545. 
Building stone, Darton and Keith, 200. 
Building stone, Gould, 301, 304. 
Building stone, Lakes, 472, 473. 
Building stone, Miller, 548. 
Building stone, Norton, 568. 
Building stone, Russell, 662. 
Building stone, Smith, 706. 
Building stone, Udden, 748, 
Calcite; ealc spar; Iceland spar, Merrill, 545. 
Carbonite or natural coke, Merrill, 545. 
Celestite, Merrill, 545. 
Cement, Blatchley, 67. 
Cement, Kiimmel, 455. 
Cement, Russell, 662. 
Cement, Siebenthal, 701. 
Cerite, Merrill, 545. 
Chalk, Merrill, 545. 
Chemawinite, Merrill, 545. 
Chromite, Merrill, 545. 
Clay, Babcock, 34. 
Clay, Buckley, 94. 
Clay, Darton and Keith, 200. 
Clay, Gould, 301. 
Clay, Mason, 528. 
Clay, Miller, 548. 
Clay, Udden, 748, 749. 
Clays, Merrill, 545. 
Coal, Babcock, 34. 
Coal, Becker, 50. 
Coal, Blakemore, 65. 
Coal, Calvin, 100. 
Coal, Campbell, 105. 
Coal, Catlett, 121. 
Coal, Corless, 164. 
Coal, Crane, 168. 
Coal, Darton, 198. 
Coal, Diller, 231. 
Coal, Gould, 301. 
Coal, Haseltine, 341. 
Coal, Hills, 374. 
Coal, Ingall, 401. 
Coal, Keyes, 438. 
Coal, Lakes, 463. 
Coal, Lakes, 465, 466. 
Coal, McCalley, 511. 
Coal, Miller, 548. 
Coal, Purington, 636. 
Coal series, Merrill, 545. 
Cobaltite, Merrill, 545. 
Colemanite, Merrill, 545. 
Columbite and tantalite, Merrill, 545. 
Copper, Becker, 50. 
Copper, Biddle, 60. 
Copper, Grant, 313. 
9251— No. 203—02 8 
Economic products described — Continued. 
Copper, Kiimmel, 456. 
Copper, Lowry, 500. 
Copper, McCormick, 515. 
Copper, Stretch, 734. 
Copper, Vaughan, 769. 
Copper, Weed, 795. 
Corundum, Ropes, 657. 
Corundum and emery, Merrill, 545. 
Cryolite, Merrill, 545. 
Descloizite, Merrill, 545. 
Diamond, Hobbs, 378. 
Diaspore, Merrill, 545. 
Diatomaceous or infusorial earth, Merrill, 545. 
Dolomite, Merrill, 545. 
Elaterite, mineral caoutchouc, Merrill, 545. 
Emery, Eckle, 254. 
Epsomite, Epsom salts, Merrill, 545. 
Erythrite or cobalt bloom, Merrill, 545. 
Feldspar, Merrill, 545. 
Fire clay, Hopkins, 388. 
Flint, Merrill, 545. 
Fluor spar, Burk, 96. 
Fluorite, Merrill, 545. 
Franklinite, Merrill, 545. 
Fuller's earth, Darton, 198. 
Gadolinite, Merrill, 545. 
Garnet, Merrill, 545. 
Gibbsite, hydrargillite, Merrill, 545. 
Glauberite, Merrill, 545. 
Glaucodot, Merrill, 545. 
Gold, Becker, 50. 
Gold, Chalmers, 123. 
Gold, Chance, 131. 
Gold, Coleman, 154. 
Gold, Comstock, 161. 
Gold, Diller, 231. 
Gold, Furman, 289. 
Gold, Hershey, 367. 
Gold, Knapp, 444. 
Gold, Knight, 448. 
Gold, Lakes, 461. 
Gold, L'Hame, 488. 
Gold, Lowry, 500. 
Gold, Purington, 636. 
Gold, Ransome, 639. 
Gold, Rickard, 646,648. 
Gold, Schrader and Brooks, 681. 
Gold, Watson, 792. 
Gold, Weatherby, 793. 
Gold, Weed, 796. 
Grahamite, Eldridge, 255. 
Grahamite, Merrill, 545. 
Grindstones, whetstones, and hones, Merrill, 
545. 
Gum copal, Merrill, 545. 
Gypsum, Darton, 198. 
Gypsum, Merrill, 545. 
Halite, sodium chloride or common salt, 
Merrill, 545. 
Hausmannite, Merrill, 545. 
Ilmenite, menaccanite, or titanic iron, Mer- 
rill, 545. 
Iron, Chance, 132. 
Iron, Coleman, 155. 
Iron, Courtis, 165. 
Iron, Crosby, 175. 
