188 



SCIENCE. 



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



Bayley, Dr. W. S., assistant geologist, will 

 survey crystalline rocks of Raritan quadrangle, 

 New Jersey. 



Boutwell, John M., assistant geologist, will 

 complete investigation of mining geology of 

 Park City district, Utah, and make a recon- 

 naisance of Coalville quadrangle. 



Branner, Professor J. C, geologist, will con- 

 tinue areal work in Santa Cruz quadrangle, 

 California, and prepare the folio for publica- 

 tion. 



Brooks, Alfred H., geologist in charge of 

 geologic work in Alaska, will continue super- 

 vision of geologic work in Alaska. Will visit 

 the Spencer party at Juneau, and later spend 

 six weeks in company with L. M. Prindle in 

 visiting region of lately discovered placer gold 

 fields in Tanana Valley. Latter part of season 

 he will spend in Seward Peninsula visiting 

 the Collier and Mofiit parties. 



Butts, Charles, assistant geologist, under 

 supervision of M. E. Campbell, will continue 

 areal and economic surveys on quadrangles in 

 western Pennsylvania, in cooperation with 

 state. 



i Calhoun, P. H. H., assistant geologist, will 

 assist Professor E. D. Salisbury in glacial 

 work west of one-hundredth meridian. 



Calkins, P. C, assistant geologist, will assist 

 Dr. P. L. Ransome in study of areal and eco- 

 nomic geology of Coeur d'Alene mining dis- 

 trict, Idaho. Later in the year will assist 

 George H. Eldridge in areal work in southern 

 California. 



Campbell, M. E., geologist, will have imme- 

 diate supervision of areal and economic work 

 in Appalachian coal field. 



Chamberlin, Professor T. C, chief of sec- 

 tion, will continue supervision of investiga- 

 tions of Pleistocene geology of United States. 



Clapp, Prederick G., geologic aid, under 

 supervision of M. E. Campbell, will continue 

 areal and economic surveys on quadrangles in 

 western Pennsylvania, in cooperation with 

 state. 



Collier, Arthur J., assistant geologist, will 

 make careful investigation of gold placers of 

 Seward Peninsula, Alaska, with view to sup- 

 plementing hasty reconnaissance work of pre- 



vious years. Will also undertake some areal 

 mapping and stratigraphic studies in this re- 

 gion. 



Crane, Professor W. E., field assistant, will 

 assist Dr. Geo. I. Adams in the measurement 

 of gas pressures in connection with the survey 

 of lola thirty-minute quadrangle, Kansas. 



Cross, Dr. Whitman, chief of section, will 

 continue investigation of areal geology of San 

 Juan district, Colorado, and have general 

 supervision of investigations in petrology 

 throughout the United States. 



Dale, Professor T. Nelson, geologist, will 

 continue investigation of areal and economic 

 problems in western Veimont, and survey the 

 Brandon quadrangle for folio publication. 



Dall, Dr. Wm. H., geologist and paleontolo- 

 gist, will be occupied during greater part of 

 year in completion of monograph on south- 

 eastern and Florida Tertiaries. On comple- 

 tion of that work he will take up study of 

 invertebrate Tertiary paleontology of Pacific 

 coast. 



Diller, J. S., geologist, will complete areal 

 and economic survey of Redding quadrangle, 

 California, and make general reconnaissance 

 of geology of Klamath Mountains. 



Dominian, Leon, field assistant, will assist 

 J. E. Spurr in completion of economic in- 

 vestigation of Tonopah mining district, Ne- 

 vada, and in economic geology work in Silver. 

 Peak quadrangle, Nevada. 



Eckel, Edwin C, assistant geologist, will 

 make detailed investigation of cement indus- 

 try of United States. 



Eldridge, George H., geologist, will spend 

 first half of year in completion of reports on 

 Florida phosphates and California oil fields. 

 Later in season will take up areal work in 

 southern California. 



Emerson, Professor B. K., assistant geolo- 

 gist, will continue work on areal geology of 

 central Massachusetts. 



Emmons, S. P., chief of section, will be 

 occupied throughout the year with supervision 

 of investigations of metalliferous ores and 

 completion of report on geology of Leadville 

 mining district. 



Gale, Hoyt S., geologic aid, will assist Ar- 



