INDEX TO VOLUME 21 



803 



Page 



Councilor, C. S., Prosser elected 3 



— , J. B. Woodworth elected 3 



Crandall, Roderic, cited on ants of 



South America 452. 475, 479 



— , Photographs of ant-hills by 



449, 466, 467, 468, 481, 483 

 Cretaceo-Eocene age, Wasatch range 



overthrusts of 589, 542 



Ceosby, W. O., cited on beach cusps. . . 604 

 Cross, Whitman, Discussion on origin 



of the alkaline rocks by 32 



— some mineral relations from 



the laboratory viewpoint by 32 



— , Vote of thanks offered by . . "^. 34 



— and Erxest Howe quoted on "rock 



glaciers" and "rock streams" 663 



— . "Rock stream" as a geologic 



term first used by 663 



CiUCiBLE for the accurate determina- 

 tion of melting point of minerals, 



Figure 4, showing 159 



Crystal classes. Tables for the deter- 

 mination of 731-736 



Crystals (mix-) and solid solutions, 



Description of 152 



C-^ystallization. Molecular composi- 

 tion at the moment of 168 



Crystallography^ Difficulties in 731 



— , Key to 731 



CULMER. H. L. A., Diagrams showing 

 origin of the Caroline and the 

 Edwin natural bridges, furnished 



by 318, 319 



— , Photographs of the Edwin and Au- 

 gusta sandstone natural bridges 

 from paintings of 317 



— quoted on courses of streams in San 



Juan county. Utah 317 



Comings. Edgar R.. cited on Richmond- 



ian fossils 699 



— and L. Hussakof : Paleontologic evi- 



dences of recapitulation 74 



CusHixG. H. P. ; Bleaching of granite 

 and limestone contacts. (Ab- 

 stract.) 33. 786 



— , Discussion on origin of the alkaline 



rocks by 32 



— elected Librarian 3 



— quoted on underground of Black 



river. New York 332 



— and E. O. T^lrich (extempore Pro- 



fessor Cushing) ; Age of the "cal- 

 ciferous" formation of the Mohawk 



vallev 30. 780 



Cusps, Beach 26, 27 



CiTTTiNGSviLLE. Vermont, Thie complex 



of alkaline igneous rocks at. . . 32, 785 

 Cystid (new) from the Clinton forma- 

 tion of Ontario ; W. A. Parks 76 



Dall, William H., cited on occurrence 



of interglacial beds in Canada .... 435 



— and Richard S. Lull ; Embryology 



and paleontology 74 



— cited on Alaska and Its resources . . . 



398, 399 

 Daly, R. A., cited on Cambrian faunas 



of the Rocky mountains 523 



• — ice erosion 727 



— , Discussion on geologic thermometry 



by 32 



■ — volcanic action by 23 



— ; Hawaiian volcanoes 22, 767 



— ; Origin of the alkaline rocks.. 32,87-118 

 — , Reference to writings on origin of 



certain minerals Ill 



Dana. J. D., cited on Basin Range 



structures 550 



— cited on groups of crystals 732 



Page 

 Dana, /. D., "Niagara period" defined by 680 

 — , Reference to class names of crystals 



used by 732 



Darwin, Charles, cited on earthworms. 493 

 — , Reference to his "Corals and coral 



islands" 646 



Darton, N. H., cited on natural bridges 



of Le Perle creek, Wyoming, and 



Buffalo gap. South Dakota 320 



— cited on Zuni salt deposits 648 



— , Photograph Committee, Report by . . 19 

 — , Photograph of natural bridge in Big 



Bad Lands, South Dakota 325 



— quoted on rock of natural bridge in 



Big Bad Lands, South Dakota 326 



"Das Antlitz der Erde," Work of Ed- 



uard Suess 28 



DAUBR:fiE, G. A., cited on experiments 



with sand grains 635 



Davis, Charles A. ; Salt-marsh forma- 

 tion near Boston and its geological 



significance. (Abstract.) 29,766 



Davis, W. M., cited on derivation of 



sand from shells or lime-secreting 



plants 644 



^— land degradation in an arid 



climate 567 



marl 644 



physiography of the Wasatch 



region 519, 541 



— , Discussion on conditions of the Kee- 



watin by 25 



- — Niagara river and the Glacial 



period by 26, 763 



— • — ■ — origin of Cliff lake, Montana, 



by 26, 764 



— ■- — — post-Tertiary history of the 



lakes of Asia Minor and Syria by . . 



20, 755 

 rock streams of Veta mountain 



by 26 



— some effects of glacier action in 



Iceland by 20, 759 



— types of sand grains by ... . 25, 776 



■ — volcanic action by 23, 768 



— quoted on formation of arid plains . . 



582, 586, 587 



— ; Theory of isostacy. (Abstract.) 25,777 

 Davis, Wm. J., on committee Cincinnati 



meeting, 1881 742 



Day, Arthur L.', elected Fellow 3 



— ; Some mineral relations from the 



laboratory viewpoint 32, 141-178 



— and E. S. Shepherd ; The lime-silica 



series of minerals. Reference to. . . 166 



E. T. Allen ; Isomorphism and 



thermal properties of feldspars. 



Reference to 165, 166 



— , Robert B. Sosman, and .T. K. Clem- 

 ent, Reference to their work on 



high temperature 145 



I)f:AN. George A., and T. J. Headlee ; 

 The mound-building prairie ant. 



Reference to 451 



Deeps, Frontal oceanic 200,201 



Deflation and the relative eflSclencies 

 of erosional processes under condi- 

 tions of aridity ; Charles R. Keyes . 



565-598 

 De Geer, Gerard, cited on Pleistocene 

 chang'es of level in eastern North 

 America 245 



— quoted on lakes Dakota and Agassiz. 239 

 — - quaternary changes of level in 



Scandinavia 245, 246 



— , Reference to paper on Pleistocene 



changes of 227 



"Quaternary changes of level 



in Scandinavia" 228 



