X INDEX TO VOLUME IV 



PAGE 



Livingston Folio - - - - 246 



Pike's Peak Folio - - - - 251 



Placerville Folio 248 



Ringgold Folio 760 



Sacramento Folio ---------- 250 



Sewanee Folio - - - - - - - - - - - 766 



U. S. Geol. Survey, Sixteenth Ann. Report ------ 880 



Yardley Fault. B. S. Lyman - 245 



Abundance of Stratified Drift --------- 948 



Acid Augite-andesites - - - . - 276 



Adams, F. D. Ueber das Norian oder Oberlaurentian von Canada. (Abstract) 374 



Adjustments of Drainage ---------- 569 



Age of the Auriferous Gravels of the Sierra Nevada. Waldemar Lindgren - 881 



Age of Drainage Modifications . - - - 663 



Agencies of Rock Weathering - - - 706 



Aguilera, Jose G., y Ezequiel Ordoilez, Expedicion Cientifica al Popocatepetl. 



Review by O. C. Farrington - 516 



Alignment of Drainage - - 657 



Alteration, Magmatic, Causes of -------- - 258 



Conditions of - - - - - 261 



Consequences of----------- 270 



Amazon Region, Fossiliferous Beds of - - 975 



Ammonia in Weathering - - - - - - - - - - 10% 



Analogies between Subterranean and Surface Igneous Phenomena - - 192 



Analcite Groups of Igneous Rocks - - - 679 



Analyses : 



Analcites ----- 682, 684 



Andesites 5^5 



Anorthosites - - - - - -- - - - - 9^9 



Ciminite - ----- 837, 849 



Diorite - - 740> 861 



Gneiss - - - - - - - 860 



Granite - - - - - - - - - : - - - 909 



Kaolin - - . - - . - 860 



Leucite Rocks - - - - - - 5^5 



Leucite-Trachyte - . - - - .--.- - - §49 

 Limestone - - - - - - - """ --861 



Minerals - - - - - - -. ^ . - " . ' " 7^1 



Monchiquites -- - -- - - -- - - 688 



Monzonite . - - - - 740 



Nephelinite - - - - - - - - - ■? - 688 



Nephelite-Basalt - - - 688 



Nephelite-Tephrite - - - -: - - - - -. . - 688 



Phonolite - - - - 849 



Potash Syenite - - - - - - - - - - - 740 



Soda Syenite - - - - - - ■' ". ■ ' " 74° 



