538 EDITORIAL 



"The Effect of Diurnal Heat on Glacial Activity," J. F. Todd ; 

 "On Extra Terrestrial Stresses," E. Haworth ; "On Stoping as 

 a Factor in the Formation of Terraces," T. C. Chamberlin ; "On 

 Campodus, Helicoprion, Acanthus and other Paleozoic Sharks," 

 Charles R. Eastman; "The Oscillations of the Coast Ranges of 

 California," A. C. Lawson ; "Some Features of the Geology of 

 Golden, Colorado," H. B. Patton ; "The Geological Occurrence 

 of Oil in Colorado," A. Lakes ; " Report on Some Studies Rela- 

 tive to Primal Questions in Geology," T. C. Chamberlin ; "A 

 Plea for Greater Simplicity in the Language of Science," T. A. 

 Rickard ; " Sandstone Intrusions near Santa Cruz, California," 

 J. F. Newsome and J. C. Branner ; "On the Pleistocene Deposits 

 of Iowa," Samuel Calvin; "Problems of the Quaternary 

 Deposits of the South Platte Valley," George L. Cannon ; 

 " Physiography of the Boston Mountains, Arkansas," A. H. 

 Purdue; "Some Problems of the Dakota Artesian System," 

 James E. Todd ; "A Quantitative Study of Variation in the 

 Fossil Brachiopod Platystrophia biforta, Schl.," E. R. Cumings 

 and A. V. Mauck ; " Interpretation of Some Drainage Changes 

 in Southwestern Ohio," W. G. Tight ; " The Minerals and 

 Mineral Localities of Texas," F. W. Simonds ; "The Minerals 

 Associated with Copper in Southeastern Arizona and South- 

 western New Mexico," G. H. Stone; "The Extinct Glaziers of 

 New Mexico and Arizona," G. H. Stone; "Note on Certain 

 Copper Minerals," A. N. Winchell ; " The Areal Geology of the 

 Castle Rock Region," W. T. Lee. The ofificers of the section 

 were: C. R. Van Hise, vice president, and H. B. Patton, secre- 

 tary. Those elected for the ensuing year are : O. A. Derby, of 

 San Paulo, Brazil, vice president ; and F. P. Gulliver, of South- 

 boro, Mass., secretary. C. 



