INDEX 



161 



Hydrostatic pressure, disclosed in 

 survey of ground waters, 55. 



Idaho-Montana survey, 21. 



Indian reservations, withdrawal of 

 lands from, 66. 



Indian Service, stream-gaging sta- 

 tions maintained in cooperation 

 with Survey, 52. 



Irrigation, reclamation of arid public 

 lands, investigation by Geological 

 Survey, 17-18. 



Isthmian Canal Commission, coop- 

 erative agreement with, for stud- 

 ies in Canal Zone, 14. 



King, Clarence, exploration of for- 

 tieth parallel directed by,^ direc- 

 tor of Geological Survey, 9; report 

 on extension of operations on 

 national scale, 10-11. 



Land classification, 50-71; appro- 

 priation for work of, 64; legal 

 provisions applied in, 64; syste- 

 matic, 67-69; on applications, 70. 



Land classification board, 81. 



Land classification maps, prepara- 

 tion of, 22. 



Land subdivision surveys, 20. 



Laws, text of, 1 10-122. 



Lewis and Clark Expedition, 1804- 

 1806, 1. 



Lithographing and engraving plant, 

 operation of, 71. 



Map editing division, 83. 



Massachusetts, cooperation with 

 Geological Survey in survey of, 12. 



Metals section, 79. 



Military encampments, examination 

 of water and drainage in, 28. 



Military service, personnel of Geo- 

 logical Survey contributed to, 28. 



Millionth scale map, United States 

 'portion of, 35. 



Mine explosions, investigation of, 25. 



Mine-rescue apparatus, examination 

 of, 25. 



Mineral classification division, 82. 



Mineral industries, compilation of 

 information relative to, 49-31. 



Mineral land law, 60. 



Mineral resources, appropriation for 

 procuring statistics in relation to, 

 15; investigation of, 43-45; in- 

 vestigation of, in Alaska, 43; oil 

 shales of Green Bay region, 43; 

 compilation of information rela- 

 tive to, 40-51. 



Mineral resources division, 78. 



"Mineral Resources of the United 

 States," 15, 50. 



Minerals, location of, for manufac- 

 ture of munitions, 28. 



Mining technology, work in, 24-25. 



Monographs, 40. 



Monographs and bulletins, prepara- 

 tion restricted, 16. 



Municipal water supplies, right-of- 

 way permits, 65. 



National Academy of Sciences, rec- 

 ommendations for establishment 

 of Geological Survey, 7-8; report 

 on survey and disposition of public 

 lands, 61. 



National Forest Reservation Com- 

 mission, lands acquired for pro- 

 tection of navigable streams se- 

 lected by, 58. 



Navigable streams, acquisition of 

 lands for protection of, 58. 



Oil lands, withdrawn from entry, 

 64; systematic classificationsof,67. 



Oil-producing sands, entrance of 

 water into, 47. 



Oil-shale lands, withdrawn from 

 entry, 64; systematic classifica- 

 tion of, 68. 



Ores, radio-activity of, 48. 



Organization of Survey, 73-84; out- 

 line of, 85-104. 



Owen, D. D., surveys made by, 2. 



