INDEX TO VOLUME 21 



819 



I'age 

 Seismograph, Time of Yakutat Bay 



earthquake determined by 386 



Seismographic data, Tables establish- 

 ing 379-382 



Seismographs^ Origin of earthquakes 



located by 376 



Seismologists, Studies of Alaskan 



earthquake by experienced 374-394 



Seismology, Resokition concerning. . . . 794 

 Sellards, E. H., cited on natural 

 bridge near Homosassa, Walton 

 county, Florida 332 



— quoted on sand of interior of Florida. 



635, 636 

 Serpentines of the central coast 



ranges of California ; H. E. Kramm 793 

 Shaler, N. S., "Aspects of the earth," 



Reference to 330 



— cited on natural bridge at Santa 



Cruz, California 326 



origin and nature of soils . 630, 632 



— , Description of beach cusps by 599 



— quoted on beach cusps 599, 600 



— , Reference to his paper "Phenomena 



of beach and dune sands 636 



"Sea and land" 600 



— , Theory of formation of beach cusps. 615 

 Shales, Chagrin, at Cleveland, Ohio 24, 771 

 Shells, Internal characters of some 



Mississippian rhynchonelloid 76, 498-516 

 Shepherd, E. M., cited on natural 



bridges in Green county, Missouri. 329 

 Shepherd, B. S., The binary systems of 

 alumina with silica, lime, and mag- 

 nesia. Reference to 166 



— and Arthur L. Day, The lime silica 



series of minerals, Reference to. . . 166 

 Sherzer, W. H. ; Criteria for the recog- 

 nition of various types of sand 



grains 25, 625-660, 775 



Shifting and migrations of Devonian 



faunas 76, 285-294 



— Devonian faunas, Facts sustaining 



the hypothesis of 286-290 



— of Devonian faunas. Limited range 



of recurrent species in 288 



faunas. Interpretation of the facts 



relating to 289 



Shimek, B. ; Evidence that the fossil 



iferous gravel and sand beds of ^n" If^ 

 Iowa and Nebraska are Aftonian. . 31 



Shimer, H. W., cited on beach cusps. . . 604 



Shorelines of the glacial lakes in the 

 Oberlin quadrangle, Ohio ; Frank 

 Carney 21, 762 



Shumardella missouriensis (Shumard), 



Figure showing and description of. 512 



— , n. gen 512 



— obsolescens (Hall), Figure showing 



and description of 513 



SiLURic beds, Reference to Gulf of Saint 

 Lawrence region. Bay de Chaleur 

 and Arisaig, Nova Scotia 716 



— system, Anticosti Island Niagaran 



(Anticostian) series 704-716 



Silverton folio (Colorado), Remark- 

 able rock debris described by Cross 



and Howe in 663 



Simpson, , cited on occurrence of 



interglacial beds in Canada 435 



Sinclair, W. J., Discussion on Varano- 

 saurus species, a Permian Pelyco- 

 saur 74 



— and E, O. Ulrich : Interdependence 



of stratigraphy and paleontology. . 73 

 Sitka, Alaska, Installation of magneto- 

 graph and seismograph at 400 



Skull of Tyrannosaurus ; H. F. Osborn 75 

 Smith, E. A. ; Memoir of Daniel W. 



Langton, Jr. (with bibliography) .13-16 



Page 

 Smith, H. H., quoted on phosphorescent 



termites 492 



— , Specimens of genus Rhipidomella 



collected by 300 



Smith, Philip S., elected Fellow 4 



Smith, Warren Du PrS, elected Fel- 

 low 4 



Smith, W. S. Tangier ; Tables for the 

 determination of crystal classes. . . 



731-736, 790 

 Smyth, C. H., Jr., cited on oolitic iron 



ore of the Clinton formation 648 



— quoted on Sylvania sandstone 655 



Society, The Paleontological 16 



SoKOLow, , cited on experiments 



with sand grains 641 



Solidification, Uncertainty of under- 

 cooling 148 



Solution of carbonates in subalkaline 



magma. Effects of the 108 



SORBY, H. C, cited on age of sand 



grains, deposits wherein found. . . . 626 



classification of sand grains.. 



626, 637 



sand derived from wave action 644 



grains from the new red 



sandstone of Penrith, England.... 649 



structure and origin of non- 

 calcareous stratified rocks .... 628, 632 



SosMAN, Robert B., and Arthur L. 

 Day, Reference to their work on 

 high temperature 145 



SouLE, Frank, and R. L. Humphrey, 

 cited on San Francisco earthquake 

 and fire of 1906 405 



South America, Tertiary crustal move- 

 ments in 215 



— Dakota, Natural bridge at Buffalo 



gap 320 



in Bad Lands 315 



Big Bad lands 325,326 



Species, Intracolonial acceleration and 



retardation and its bearing on ; 



Amadeus W. Grabau 76 



Spencer, J. W., Altitude of Algonquin 



beach, 1887, measured by 233 



— cited on channel of ancient Algon- 



quin river 241 



deformation of the Iroquois 



beach and birth of lake Ontario. . . 242 

 evolution of the falls of Ni- 

 agara 242 



the focus of regional post- 



Glacial uplift 242 



— , Discussion on gorge of the Hudson 



by 21, 760 



isobases of the Algonquin and 



Iroquois beaches by 21, 761 



— • natural bridges of North 



America by 22 



— , Lifting of the Algonquin beach first 



recognized by 231 



— , Names "lake Algonquin," "Algon- 

 quin beach," and "Algonquin river" 

 first used by 229 



— ; Partial drainage of Niagara falls in 



February, 1909 26, 447-448 



— ; Relationship of the Niagara river 



to the Glacial period.. 26,433-440,763 



— ■ ; Relative work of the two falls of 



Niagara 22, 763 



— , Term "Forest Glen Epoch" given by 439 



— ; "The evolution of the falls of Ni- 

 agara," Reference to 433 



Spencer, A. C, cited on glaciation In 



Alaska 725 



Spirifer loonensis ?, Fossil of Wasatch 



region 530 



— earner atus 1, Fossil of Wasatch re- 

 gion 530 



