INDEX TO VOLUME 30 



Page 



Abitibi River limestone.. 375 



Abbott, C. G., cited on sun beat 541 



. volcanoes and climates 5b2 



Acre, Geology of 224 



Adirondack Precambian loo 



Africa, Phosphate deposits of 104 



Age of certain plant-bearing beds and 

 associated marine formations m 



South- America ; E. W. Berry 153 



Alabama. Crystalline rocks of 113 



— ; Graphite deposits of 112 



Alagoas. Geology of 225 



Alaska. Glaciation in 115 



Alden, W. C. cited on argillites 552 



Aldrich. L. B., cited on clouds 540 



Algonkian flora 506 



Allegheny formation of Maryland. . . . 572 



— ■ — , Typical section of the 153 



Alling, H. L. ; Some problems of the 



Adirondack Precambian 155 



Amazoxas. Geology of 229 



America. Phosphate deposits of 104 



American geology, Sources and tenden- 

 cies in 'J 



— mapping in France; G. S. Smith... 110 



— topographer as artillery orientation 



officer HO 



A method of aerial topographic map- 

 ping; F. H. Mofflt and J. W. Bag- 

 ley ...••• 110 



Amphiccelias, Camarasaurus, and other 



sauropods of Cope 379 



— from Canon City 151 



A NEW Eurypterid horizon ; G. H. 



Chadwick 152 



Anticlinal theory, as applied to some 



quicksilver deposits: J. A. Udden.. 112 

 A plane-table for military mapping ; 



A. M. Bateman Ill 



Aplite dikes of New York 93 



Archean of Brazil 203 



Arizona. Permo-Triassic of 155, 471 



__ — formations of 471. 491 



fossils from 471-491 



Arnold, R. ; Economic value of paleon- 

 tology 153 



— . Oil geology in relation to valuation. 96 



Arrhenius. . cited on cause of 



glaciation 557 



AsHOKAN formation 468 



Attawapiskat coral reef 368 



Atwood, W. W., Reference to war work 



of 177 



Auditing Committee of Geological So- 

 ciety. Report of 95 



— Paleontological Society 146 



— . Report of 151 



Bactritid^. Significance of the 148 



Bagley, J. W., and F. H. Moffit ; A 

 method of aerial topographic map- 

 ping 110 



Bahia. Geology of 234 



Barrell, .T.. cited on geologic climates. 553 



■ — radioactivity 544 



' — ; Sources and tendencies in American 



geology 77 



— . News on geologic climates of 563 



Barrows. H.. H., Reference to war work 



of 180 



Page 

 Bassler, Harvey, and C. K. Swartz ; 

 Typical section of the Allegheny 



formation ' 153 



— , C. K. Swartz, and W. A. Price, Jr. ; 



Coal Measures of Maryland 567 



; Stratigraphy and correla- 

 tion of the Coal Measures of Mary- 

 land 154 



Bassler, R. S.. cited on argillites 532 



— , Secretary; Proceedings of the Tenth 

 Annual Meeting of the Paleonto- 

 logical Society, held at Baltimore, 



Maryland, December 28, 1918 143 



Bateman, Alan M. ; Military and geo- 

 logic mapping — a plane-table 405 



— ; A plane-table for military mapping. Ill 



Becraft fauna 470 



Bell, Robert, cited on Devonian fossils 370 



— • Ordovician rocks 342 



Silurian coral reefs 353 



Berger, D. B., cited on Coal Measure 



sections 583 



Berkey. C. p. ; Engineering geology in 



and after the war 81 



— , Reference to war work of • 177 



Berry, E. W. ; Age of certain plant- 

 bearing beds and associated marine 



formations in South America 153 



— - appointed on Board of Control 146 



— cited on Cretaceous flora 52 



• Wilcox plants 530 



Bibliography of geology of Brazil.... 223 

 Pleistocene geology of New Eng- 

 land 632 



Bliss, E. A. ; Some problems of inter- 

 national readjustment of mineral 

 supplies as indicated in recent for- 

 eign literature 101 



Brighton, Colonel, cited on topo- 

 graphic mapping 400 



Bowman. Isaiah, Reference to war 



work of 177 



Branner, J. C. ; Outlines of the geology 

 of Brazil to accompany the geologic 



map of Brazil 189 



Brazil, Archean of 203 



— , Bibliography of geology of 223 



■ — -, Carboniferous of 208 



— , Climatic conditions of 337 



■ — ■, Cretaceous of . . . 221 



— , Devonian of 207 



— , Economic geology of 223 



— , Economic outlines of 323 



— , Geologic map of 189 



— , Maps of 197 



■ — , Minerals of 324 



— , Mining laws of .S34 



— ; Outlines of geology of 189 



— , Paleozoic of 204 



— ; Permian of 211 



■ — , Petrography of 222 



— , Reoort of Committee on Publication 



of map of . 76 



— , Silurian of 207 



— -. Stratigraphic geology of 203 



— , Tertiary of 221 



■ — , Triassic of 220 



— . Works on general geology of 199^ 



— ■ physical geography of 198 



of travel on 335 



Brigham. a. p. ; Principles in the de- 

 termination of boundaries. ....... 105 



Broadhead, G. C, Memorial of . . IS 



(637) 



