190 



SCIENCE. 



[N. S. Vol. XVIII. No. 449. 



making detailed stratigraphic studies and 

 paleoutological collections. 



Peterson, William, field assistant, will assist 

 Professor E. D. Salisbury in glacial work west 

 of one-liundredth meridian. 



Prindle, L. M., special assistant, will make 

 reconnaissance surveys of Fortymile, Birch 

 Creek and Lower Tanana placer gold fields. 



Purdue, Professor A. H., field assistant, will 

 assist Dr. George I. Adams in study of north 

 Arkansas lead and zinc district. 



Ransome, Dr. F. L., geologist, associated 

 with Dr. Lindgren, will make a resurvey of 

 the Cripple Creek district, Colorado, in coop- 

 eration with the state, and will study areal 

 and economic geology of Coeur d'Alene mining 

 district, Idaho. 



Eussell, Professor I. C, geologist, will make 

 a geologic reconnaissance of western Idaho 

 and central Oregon, in cooperation with Di- 

 vision of Hydrography. 



Salisbury, Professor E. D., geologist, will 

 have immediate supervision over glacial work 

 west of one-hundredth meridian. 



Schrader, F. C, geologist, will be occupied, 

 in completing reports on geology and mineral 

 resources of northern Alaska, and on the geol- 

 ogy and mineral resources of Upper Copper 

 Eiver region. 



Smith, Dr. George Otis, geologist, will carry 

 on areal and economic work in Maine, in coop- 

 eration with State Geological Survey. 



Smith, W. N., field assistant, will assist Dr. 

 C. E. Van Hise in preparation of final report 

 on geology of Lake Superior region. 



Smith, Dr. W. S. Tangier, assistant geolo- 

 gist, will complete reports on lead and zinc 

 deposits of Joplin, Missouri, and western 

 Kentucky districts, and complete areal field 

 work on pre-Cambrian areas in the Sundance 

 quadrangle, South Dakota. 



Spencer, Dr. Arthur C, geologist, will in- 

 vestigate areal and economic geology of Ju- 

 neau mining district. Later will make recon- 

 naisance of economic geology of Berners Bay 

 and some of the other mining districts of 

 southeastern Alaska. 



Spurr, J. E., geologist, will complete eco- 

 nomic investigation of Tonopah mining dis- 



trict, Nevada, and will revise economic geol- 

 ogy of Silver Peak quadrangle, Nevada. 



Stanton, Dr. T. W., chief of section, will 

 make a study of non-marine Mesozoic forma- 

 tions of northern Montana, and later in season 

 will visit various Lower Triassie localities in 

 southeastern Idaho and northern LTtah, and 

 Cretaceous outcrops in southern Wyoming; 

 and will have general supervision of investiga- 

 tions in paleontology throughout the United 

 States. 



Stone, Ealph W., assistant geologist, under 

 supervision of M. E. Campbell, will continue 

 areal and economic surveys of quadrangles in 

 western Pennsylvania, in cooperation with 

 state. 



Stose, George W., editor geologic maps, 

 geologist, will be occupied chiefly in editing 

 geologic maps, but will spend a short field' 

 season in completion of areal work on Cham- 

 bersburg quadrangle, Pennsylvania. 



Taff, J. A., geologist, will be occupied with 

 the preparation of reports on Indian Terri- 

 tory coal fields. 



Taylor, Frank B., field assistant, will con- 

 tinue preparation of his contribution to Lev- 

 erett monograph, and will complete his work 

 on Pleistocene geology of Taeonic quadrangle. 



Ulrich, E. 0., assistant geologist, will study 

 the paleontology and stratigraphy of the Or- 

 dovician and Silurian of the upper Mississippi 

 Valley, and in connection with various geol- 

 ogic parties elsewhere. 



Van Hise, Dr. C. E., chief of section, will 

 continue supervision of investigations in pre- 

 Cambrian and metamorphic geology of United 

 States, and will prepare final report on geology 

 of Lake Superior region, 



Vaughan, Dr. T. W., geologist, will continue 

 preparation of monograph on fossil corals of 

 United States. 



Ward, Professor Lester F., paleontologist, 

 will continue preparation of series of papers 

 on Mesozoic floras of United States, com- 

 pleting the second paper on the older Potomac, 

 the Shasta, the Kootanie and Trinity, and 

 taking up the Middle Cretaceous. 



Weed, W. LI., geologist, will be occupied 

 with completion of report on economic geology 



