68 INDEX TO NORTH AMERICAN GEOLOGY, PALEONTOLOGY, [bull. 189. 
Economic geology— Continued. 
MisceUaru ou% discussions — Continued. 
Bauxite, Hunt, 2807. 
Building stones of the United States, Day, 
1465a. 
Causes of ore deposits, Keyes, 3145a. 
Chromic iron, occurrence in Canada, Glenn, 
2041. 
Classification of economical geological de- 
posits, Crosby, 1154, 1158. 
Classification of economical geological de- 
posits, Raymond, 4553. 
Classification of ore deposits, Kemp, 2973a. 
[Classification of ore deposits] , Raymond, 4556. 
Clay veins vertically intersecting coal meas- 
ures, Gresley, 2180. 
Clay-working industry, Ries, 4619, 4625. 
Coal and petroleum, origin of, Forstall, 1875. 
Coal deposits of trans-Mississippian field, 
Keyes, 3139. 
Coal industry of Southeastern States, Head, 
2440. 
Composition of American petroleum, Mabery, 
3620. 
Composition of wind deposits, Udden, 5515. 
Contribution to the natural history of marl, 
Davis, 1343. 
Copper district in Lake Superior, Meads, 3893. 
Copper resources of the United States, Doug- 
las, 1526. 
Crushed quartz and its source, Fuller, 1902. 
Degradation of loess, Todd, 5423. 
Deposition of ores, Van Hise, 5711. 
Discovery of gold districts, Chance, 863. 
Dry gold placers of arid regions, Stone, 5257. 
Enrichment of mineral veins, Weed, 5952. 
Feldspar, its occurrence, mining, and uses, 
Hopkins, 2749. 
Filling and replacement in gold-bearing As- 
sure veins, Lindgren, 3538. 
Formation of eruptive ore deposits, Vogt, 5763. 
Formation of gold ore, Kraatz, 3268. 
Genesis of bitumens, Peckham, 4293. 
Genesis of natural gas and petroleum, Phil- 
lips, 4365. 
[Genesis of ore deposits] , Becker, 335. 
[Genesis of ore deposits] , Blake, 459. 
[Genesis of ore deposits] , Cazin, 783, 784. 
[Genesis of ore deposits], Church, 887. 
[Genesis of ore deposits] , Emmons, 1700. 
[Genesis of ore deposits] , Le Conte, 3429. 
Genesis of ore deposits, Minor, 4015. 
Genesis of ore deposits, Posepny, 4421, 4422. 
[Genesis of ore deposits] , Raymond, 4557. 
[Genesis of ore deposits], Rickard, 4595, 4599. 
[Genesis of ore deposits] , Winehell, H. V., 6283, 
6284. 
[Genesis of ore deposits] , Winslow, 6389. 
Genesis of petroleum and asphaltum, Cooper, 
1067, 1068. 
Geological age of gold, Quille, 4519. 
Geological distribution of the useful metals, 
Emmons, 1699. 
[Geological distribution of useful metals], 
Church, 886. 
[Geological distribution of the useful metals] , 
Winslow, 6391. 
Economic geology— Continued. 
Miscellaneous discussions — Continued . 
Geological probabilities as to petroleum, 
Orton, 584, 4168. 
Geology of the common roads of the United 
States, Shaler, 4922. 
Geology of the iron, gold, and copper districts, 
Wadsworth, 5768. 
Geology of the road-building stones of Massa- 
chusetts, Shaler, 4923. 
Glacial Lake Agassiz, Upham, 5600. 
Gold in granite and plutonic rocks, Blake, 471. 
Gold and silver, Dewar, 1488. 
[Gold-bearing quartz] , Argall, 117. 
Gold genesis, Wurtz, 6528. 
Gold in different formations, abundance of, 
Blake, 451. 
Gold mining in southern Appalachians, Nitze 
and Wilkens, 4112. 
Gold placers in glaciated regions, Stone, 5259. 
Horses and breccia, Wallace, 5830. 
Hydro-geology of Upper Mississippi Valley, 
Mead, 3889. 
Iron and manganese, chemical, relations of 
Penrose, 4344. 
Iron ores, classification of theories of, Win- 
ehell, N. H., 6296. 
Iron ores, formation of, Robertson, 5646. 
Iron pyrite deposits in Virginia, Nason, 4061. 
Iron ores, Birkinbine, 445. 
Is the loess of aqueous origin, Shimek, 4957. 
Kaolin, its occurrence, technology, and trade, 
Hopkins, 2748. 
Lake Superior iron-ore region, Winehell, 6287. 
Loess as a land deposit, Udden, 5511. 
[Lead and zinc deposits] , Nason, 4062. 
[Lead and zinc deposits] , Winslow, 6390. 
Manganese, Penrose, 4342. 
Metamorphism of coal, Bolton, 504. 
Mica in United States, Holmes, 2722. 
Minerals which accompany gold, Rickard, 
4605. 
Monazite, Nitze, 4105, 4111a. 
Movements of ground water, Lyman, 3618. 
Natural soda deposits in the United States, 
Chatard, 877a. 
Nature and origin of petroleum, Peckham, 
4292. 
Nature's concentrators, Lane, 3390. 
Natural gas, Gorby, 2057. 
(Natural) Rock gas and related bitumens, 
McGee, 3845. 
Nature of coal horizons, Keyes, 3059. 
Nickel, Charleton, 873. 
[Nickel deposits at Sudbury, Out.] Merritt, 
3973. 
Nickel, notes on, Mickle, 3979. 
Nickel ores, genesis of, Packard, 4252. 
Notes on the occurrence of platinum in North 
America, Day, 1464. 
Novel association of gold, Collins, 1055. 
Occurrence of fuller's earth in the United 
States, Day, 1463. 
Occurrence and uses of mica, Fuller, 1905. 
Occurrence and associates of telluride ores, 
Kemp, 3012. 
Occurrence of anthracite, Gresley, 2177. 
