INDEX TO VOLUME XVIII 779 



PAGE 



Chamberlin, Rollin T. The Appalachian Folds of Central Pennsyl- 

 vania ........... 228 



. Older Drifts in the St. Croix Region ..... 542 



Chamberlin, T..C. and R. T. Certain Valley Configurations in Low 



Latitudes . . . . . . . . . .117 



Chamberhn, Thomas C, and Rollin D. Sahsbury. College Geology. 



Review by R. T. C. . 103 



Chemical Compositions of IgneQus Rock Types, Average. By Regi- 

 nald A. Daly. Author's Abstract . . . . . .574 



Christensen, Adolf, et Georg Ziemendorff. Les tremblements de terre 



ressentis pendant I'annee 1905. Review by W. H. H. . . 197 



Clarke, F. W. Analyses of Rocks and Minerals from the Laboratory of 



the U.S.G.S. Review by Charles J. Hares .... 573 



Clay Working Industry in the United States, History of the. By 



Heinrich Ries and Henry Leigh ton. Review by R. T. C. . . 392 



Coal Fields of Manitoba, Saskatchewan, Alberta, and Eastern British 



Columbia. By D. B. Downing. Review by E. R. L. . . . 572 



Collecting Area of the Waters of the Hot Springs, Hot Springs, Ark., 



The. By A. H. Purdue ........ 279 



College Geology. By Thomas C. Chamberlin and Rollin D. Salis- 

 bury. Review by R. T. C. . . . . 103 



Collins, W. H. Report on the Region Lying North of Lake Superior 



between the Pic and Nipigon Rivers. Review by E. R. L. . . 572 



Colorado Geological Survey, First Report. By R. D. George and 



Others. Review by E. R. L. . . . 575 



Conrad and Whitehorse Mining Districts, Yukon, Report on a Portion 



of. By D. D. Cairnes. Review by E. R. L. . . 286 



Cretaceous-Eocene Contact. By Eugene Allen Smith . . . 430 



Crystalline Structure and Chemical Constitution. By A. E. H. Tut- 



ton. Review by Albert D. Brokaw . . . .582 



Crystals in Light Parallel to an Optic Axis, On the Behavior of. By 



C. Travis. Review by Albert Johannsen ..... 482 



Dale, T. Nelson. The Granites of Vermont. Review by Charles J. 



Hares . -573 



Daly, Reginald A. Average Chemical Compositions of Igneous Rock 



Types. Author's Abstract . . . . . . 574 



. Origin of the Alkaline Rocks. Author's Abstract 575 



Dannenburg, von. Geologie der Steinkohlenlager. Review by R. T. C. 100 

 Davis, William Morris. Geographical Essays. Review by R. T. C. 296 

 Denison University, Bulletin of the Scientific Laboratories of. Vol. 



XIV. Review by R. T. C 102 



Devonian of Ohio, The Middle. By Chnton R. Stauffer. Review by 



C. S. P 474 



