AMERICAN GEOLOGY— INDEX. 



733 



Page. 

 Whelpley, J. D., assistant, survey of Penn- 

 sylvania .• 490 



White, Charles A., assistant on Hpyden sur- 

 veys 592 



geological survey of Iowa 532 



on lignitie 655, 658 



paleontologist, Hayden 



survey 603 



sketch of 713 



work in connection with 

 Wheeler sur- 

 vey 616 



on Powell survey . . 619 

 White, Israel C, assistant, survey of Penn- 

 sylvania 582 



paleontological work in 



Pennsylvania 583 



sketch of 713 



Whiteaves, J. F., assistant, survey of Canada 5-49 

 Whitfield, Robert P., assistant on Iowa sur- 

 vey 465 



paleontologist, survey 



of Wisconsin 571 



sketch of 713 



with fortieth parallel 



survey 609 



Whitney, James 1)., assistant, Illinois survey 496 

 survey of Wis- 

 consin 571 



to Jackson ... 358 



auriferous gravels 578 



chemist, survey of Iowa. 465 



climatic changes 579 



metallic wealth of the 



United States 438 



sketch of 714 



State geologist of Cali- 

 fornia 515 



views on— 



age of gold-bearing 



rocks of California 516 

 comparative value 

 of gold and silver. 439 



glaciation 580 



lead in Mississippi 



Valley 439, 496 



occurrence of gold . . 439 

 origin of — 



ore deposits 473 



Potsdam sand- 

 stone 468 



Yosemite Valley 516 

 secondary enrich- 

 ment of ore de- 

 posits 440 



value of G. W. Feath- 

 erstonhaugh's 



work 303 



work in Iowa 468 



Michigan. 415,417 

 Wisconsin.. 473 



Whittlesey, Charles, assistant to Owen 413 



controversy with J. S. 

 Newberry 543 



Page. 



Whittlesey, Charles, sketch of 714 



work in Ohio 544 



Wight, O. W\, sketch of 715 



State geologist of Wisconsin. 570 



Wilkes exploring expedition 345, 422 



Williams, H. S., views on Taconic 675 



Wilson, A. D., topographer, Hayden survey. 599 

 Wilson, J. W., exception to Mitchill's hy- 

 potheses 260 



on cause of deluge 260 



Winchell, Alexander, sketch of 505, 714 



survey of Michigan . 536 



views on Taconic 675 



work on survey of 



Michigan 505 



Winchell, Newton H., assistant on survey 



of Michigan 536 



sketch of 714 



work in Black Hills. 567 



Wing, Augustus, sketch of 714 



views on Taconic 668 



Winnipeg country, work of Henry Y. Hind 



in 499 



Winslow, Arthur, assistant, survey of Penn- 

 sylvania 582 



Wisconsin driftless area 473 



survey under T. C. Chamberlin. 571 



I. A. Lapham 570 



D.D.Owen 351 



surveys under James Hall, E. S, 



Carr, and Edward Daniels 472 



work of Edward Daniels and J. 



G. Percival 442 



R. D. Irving 573 



John Murrish 552 



J.D.Whitney 473 



Wislizenus, F. A., explorations in New 



Mexico 398 



sketch of 715 



Wooster, L. C, assistant, survey of Wiscon- 

 sin 571 



Worthen, Amos H., assistant, survey of 



Iowa 465 



on origin of drift . . . 497 



sketch of 497, 715 



State geologist of Illi- 

 nois 433 



work in Illinois 496 



Wright, C. E., sketch of 715 



Wright, George F., assistant, surveyof Penn- 

 sylvania 582 



sketch of 715 



Wurtz, Henry, assistant, New Jersey survey . 460 



sketch of 715 



Wyman, Jeffries, sketch of 715 



Wyoming, Hayden survey, 1878 603 



work of F. V. Hayden 592 



Yellowstone Park, survey of by F. V. Hay- 

 den 595 



Yosemite Valley, origin of, views of J. D. 



Whitney 516 



Zirkel, Ferdinand, petrographer, fortieth 



parallel survey 609 



