1 62 



INDEX 



Paleontology and stratigraphy sec- 

 tion, 77. 



Petroleum reserves, creation of, 67. 



Phosphate lands, withdrawn from 

 entry, 64; systematic classifica- 

 tion of, 67. 



Physics, research in, 48. 



Physiography committee, 77. 



Pike expeditions, 1805-1807, 1. 



Plant, 84. 



Porto Rico, geologic researches made 

 prior to acquisition by United 

 States, 13. 



Potash lands, withdrawn from entry, 

 64; systematic classification of, 

 67. 



Powell Irrigation Survey, 17. 



Powell, J. W., surveys under direc- 

 tion of, 4; remarks on develop- 

 ment of geologic theory, 47; 

 remarks on reclamation of flood 

 plains, 57; comment on classifi- 

 cation of public lands, 61, 62. 



Power development, on streams, 53; 

 right-of-way permits, 65. 



Professional papers, 40. 



Publication branch, 83. 



Publications of Survey, 50, 53, 56, 

 107-109. 



Public domain, surveys of, 1-2. 



Public land law, administration of, 

 60-71. 



Public lands, character and value of, 

 50-71; administration of, 63; 

 withdrawal from entry, 63-71. 



Public water reserves, withdrawn 

 from entry, 64; creation of, 67; 

 systematic classification of, 68. 



Purchase of lands, for protection of 

 navigable streams, 58. 



Quality of water division, 81. 



Railroad grants, 60. 

 Reclamation act, application of, 66. 

 Reclamation of marsh lands, 58. 

 Reclamation of swamp lands, 58. 



Reclamation projects, location of, 

 53- 



Reclamation Service, organization 

 of, 23; stream-gaging stations 

 maintained in cooperation with 

 Survey, 52. 



Reservoirs, right-of-way permits for, 

 65- 



Reservoir sites, systematic classifi- 

 cation of, 68. 



Right-of-way permits, grant of, 65. 



Rocky Mountain region, appropri- 

 ations for survey of, 4. 



Safety lamps, examination of, 25. 



Sanitation, deep ground water an 

 aid to, 55. 



Schoolcraft, expedition of 1832, 1. 



Separation acts, application of, 66. 



Smithsonian Institution, exploration 

 of Colorado River by, 4; coopera- 

 tive agreement with, for studies in 

 Canal Zone, 14. 



Soil drainage, examination of, for 

 military encampments, 28. 



Spirit-level lines, authority to run, 

 32. 



State surveys, cooperative agree- 

 ment with national surveys, 12; 

 aid in collecting statistics relative 

 to minerals, 50. 



Stock-raising lands, lands desig- 

 nated, 65. 



Stream gaging, 22-23. 



Stream-gaging stations, number, 52. 



Stream measurements, number of 

 points of, 54; in survey of ground 

 waters, 55. 



Structural materials, appropriation 

 for investigating, 24, 25; investi- 

 gation of, transferred to Bureau 

 of Standards, 26. 



Surface waters, operations embraced 

 in survey of, 52-54. 



Surface waters division, 80. 



Surveys, of public domain, 1-2; by 

 Army, 1, 2; geological, first ap- 



