INDEX. 
261 
Paleoclimatology— Continued. 
Geologic climates, influenced by possible 
reversal of deep-sea circulation : 
Chamberlin, 453. 
Glacial epoch, causes : Ililgard, 1147. 
Glacial epochs : David, 657. 
Jurassic : Burckhardt, 362. 
Quaternary : Huntington, 1257. 
Relation of fossil floras to climate 
and coal beds : Lakes, 1467. 
Paleogeography. 
Champlain basin in Ordovician time: 
Ruedemann, 2098. 
Continental outlines in Tertiary time : 
Matthew, 1699. 
Devonian of eastern North America: 
Clarke. 4!HJ. 
Louisiana : Watch, 2436, 2438. 
Mississippi Valley in St. Peter time : 
Berkey, 205. 
New York, Schoharie Valley : Grabau, 
991. 
Paleontology (general). See also the classes of 
animals and Paleobotany. For 
stratigraphic see under the dif- 
ferent systems. For regional 
see under the various States. 
Alternation of fossil faunas : Keyes, 
1385. 
Caustic potash in cleaning fossils: 
Bose and Vigier, 269. 
Early surroundings of life : Lane, 1515. 
Evolution as it appears to the paleon- 
tologist : Osborn, 1846. 
Fossilization, conditions of : Hartzell, 
1087. 
Limeless ocean of pre-Cambrian time : 
Daly, 636. 
Molds of fossils, taking impressions of : 
Slocom, 2220. 
Problems of paleontology : Osborn, 
1838. 
Relations to other branches of science : 
Woodward, 2630. 
Types, in collections of Boston Society 
of Natural History : Cushman, 
CIS. 
in New York State Museum : Clarke, 
500. 
Panama. 
Geology of Canal Zone: Howe, 1244- 
1246. 
Peat. 
Tndiann, northern : Taylor, 2361. 
Iowa : Savage, '-'1 25. 
Franklin County: Williams, 2588. 
Mexico: Alcala. 22. 
Michigan: Davis, 660. 
New Jersey: Kiimmel, 1433; Parmelee 
and McCourt. 1S74. 
United Stales : 2418, 2419. 
Vermont : Perkins, 1907. 
Pebbles. 
Polished : George. 940. 
Stretched: McCallie, 1642. 
Pelecypoda. See also Mollusca. 
Aviculidae from Trias of Zacatecas : 
Freeh, 901. 
California, southern, Tertiary : Arnold, 
62. 
Devonian : Clarke, 497. 
Eocene from Alabama : Aldrich, 25. 
Indiana, Salem limestone : Beede, 178. 
Pecten from Nome gravels : Dall, 628. 
Pectens, Tertiary and Pleistocene, of 
California : Arnold, 57. 
Fnionidre from the Laramie clays of 
Montana : Whitfield, 2562. 
Venus shells in New York City : Wil- 
son, 2609. 
Pennsylvania. 
General. 
Geology as related to agriculture: 
Stout, 2323. 
Topographic and geologic survey com- 
mission report : 1902. 
Economic. 
Amity quadrangle: Clapp, 475, 477. 
Beaver quadrangle : Woolsey, 2634. 
Berks and Lebanon counties, magnetite 
deposits : Spencer, 2262. 
Burgettstown and Claysville quad- 
rangles, oil and gas : Griswold 
and Munn, 1048. 
Cambria County, clays: Phalen and 
Martin, 1923. 
Clarion quadrangle, clays: Lines, 1605. 
coal : Lines, 1606. 
Clays and shales of central Pennsyl- 
vania : Ashley, 72. 
Clearfield coal field : Ashley, 71. 
Coal: Boileau, 25:',; Seddon, 2156; 
Tower, 2388. 
anthracite : Althouse, 32 ; Griffin, 
1041 ; Joyce, 1327. 
Buck Mountain: Althouse, 31. 
Coal fields, bituminous, map of : Ilal- 
berstadt, 1063. 
Coal mining in Hazleton district : Par- 
sons, 1878. 
Graphite : Law, 1523. 
Greene County, oil and gas : Stone and 
Clapp, 2314. 
Johnstown, coal : Phalen, 1922. 
Kittanning and Rural Valley quad- 
rangles : Butts, 368. 
Lehigh Gap, paint ore: Eckel, 769, 77<». 
Mineral resources : Demming, 704-709 ; 
Stout, 2322. 
Mount Dolly Springs, phosphorus ore: 
Stose. 2321. 
Nineveh and Gordon oil sands in 
Greene County : Clapp, 472. 
Petroleum : 2389. 
Punxsutawney and Glen Campbell 
coal fields of Indiana and Jef- 
ferson comities: Peck and Ash 
ley. 1SSS. 
Rogersville quadrangle : Clapp, 47t'». 
Slate: Dale and Eckel. 625. 
South Mountain, clays: Stose, 2320. 
