304 Scientific l?itelligence. 



Tenn. ; C. W. Hayes in Ga. and Ala. ; Arthur Keith in Va., Md. 

 and N. C. ; W. B. Clark in N. J., Md. and Del. ; N. H. Darton 

 in the District of Columbia, Md. and Va., besides a large amount 

 of hydrographic work in S. Dak. and Nebraska; C. R. Yan Hiee, 

 assisted by W. S. Bayley, J. M. Clements and S. Weidman, in the 

 Menominee iron region of Lake Superior; R. T. Hill and T. W. 

 Vaughan in Texas and Indian Territory ; W. H. Weed assisted 

 by L. V. Pirsson in Montana and Arkansas ; R. C. Hills in Colo. ; 

 C. W. Cross, assisted by A. C. Spencer and C. W. Purington, in 

 Colo. ; W. Lindgren in Idaho ; H. W. Turner, A. C. Lawson and 

 J. C. Branner in California ; J. S. Diller, assisted by A. J. 

 Collier, in Oregon ; Bailey Willis, assisted by I. C. Russell and 

 G. O. Smith, in Washington. Special surveys were made in the 

 Yukon gold region of Alaska by J. E. Spurr, H. B. Goodrich 

 and F. C. Schrader ; S. F. Emmons, assisted by G. W. Tower, 

 made a special study of the mining district of Butte, Montana ; 

 G. H. Eldridge surveyed the phosphate rocks of Florida ; C. D. 

 White extended his studies of the coal floras of the Carboniferous 

 in Ky., Tenn., Penn. and Ohio; T. C. Chamberlin, in general 

 charge, assisted by Frank Leverett, H. B. Kummell, W. C. Alden 

 and J. E. Todd, extended their glacial investigations in Iowa, 

 Mo., Ind., Ills., Ky. and N. Y. ; G. K. Gilbert made a special 

 study of the region of the Great Lakes; the Director (C. D. Wal- 

 cott), assisted by F. B. Weeks, studied the Cambrian in south- 

 west Nevada and California. Of the paleontologists : G. H. 

 Girty studied the Paleozoic in Ohio ; T. W. Stanton the animals, 

 and F. H. Knowlton the plants of the Cretaceous in Colorado, 

 Wyoming and Montana ; W. H. Dall the Tertiary among the 

 large collections in the Smithsonian Institution ; L. F. Ward the 

 Cretaceous Paleobotany in Maryland and Virginia. Thirteen 

 pages of the report are devoted to the hydrographic work at 109 

 stations in 22 States. The total value of the mineral resources 

 for 1896 was $623,717,288, with only about one-twentieth of the 

 normal annual increase over that of 1895. 



The two economic papers of Part iii which have already ap- 

 peared are : — 



Reconnaissance of the Gold Fields of Southern Alaska, with 

 some notes on the General Geology by G. F. Becker, pp. 1-86, 

 23 plates including 2 maps. 



Geology of the Yukon Gold District, Alaska, by J. E. Spurr, 

 with chapter on the History and Conditions of the District to 

 1897 by H. B. Goodrich, pp. 1-392, and 20 plates including 12 

 maps, of which 5 in colors are geological. 



To meet the great demand for information concerning the gold 

 region of Alaska, a pamphlet of 44 pages with 1 map showing 

 routes of travel and distribution of gold-bearing rocks in Alaska 

 has been issued by the Geological Survey.* It was prepared by 

 S. F. Emmons chiefly from the papers of Spurr and Becker, using 

 the Coast Survey chart T as topographic base. 



* See p. 305 of this number. 



