SUBJECT INDEX 



Absorption method (electrical), 613, 614 

 Accelerometer type seismometer, 780 

 Air shooting, 887-891 



development of, 887 



explosives for, 889 



multiple reflections in, 895-897 



principle of, 888, 889 



spacing of charges, 891 



{see multiple shot point, 855) 

 Airborne operations: 



history of, 18 



magnetometer, 237-244 



seismic, 848, 849 

 Alpha counting, 1011, 1012 

 Alpha emission, 988 

 Ampere's law, 581, 582 

 Amplifiers, logging, 1098, 1100 

 Amplifiers, seismic, 810-812 

 Angular divergence, seismic, 739-743 

 Anistopy, electrical, 514, 515 

 Anomalies: 



electromagnetic, 586 



gravity, 258, 266-268, 352-354, 425, 426 



hydrocarbon, 944 



magnetic, 210-231 



magnetic, theory of, 183-206 



relation of magnetic and gravitational 

 anomalies, 190 



resistivity, 498-505, 511, 512 

 Anthracite coal deposits, 454 

 Anticline, 268 



in torsion balance survey, 286, 288, 290, 344, 

 363, 364 



temperature anomalies over, 976, 977 

 Apex law, 1144 



Askania Eotvos torsion balance, 298-304 

 Askania-Schmidt magnetometer {see Magnetome- 

 ter), 118-121 

 Askania seismometer, 806 

 Astatic gravimeter, 371 

 Automobile insurance, 1153 



B 



Bar magnet, 69, 79, 80 

 Basic efFusives: 



susceptibility of, 165, 166 

 Basic plutonics: 



susceptibility of, 165, 166 

 Bedded deposits, 51, 52 

 Beta counting, 1012 

 Beta emission, 988 

 Beta-gamma counters, 997, 998 

 Boliden gravimeter, 378, 379 



Bore-hole investigations, 1016 



dipmeter surveys {see Dipmeter survey) 



drill core measurements, 1091-1093 



drilling time logs, 1093, 1094 



electrical method {see Electrical logging) 



paleontological studies, 1090, 1091 



patents for, 1113-1121 



photoclinometer surveys {see Photoclinometer 

 survey), 1082 



radioactive markers {see Radioactive marker) 



radioactivity well-logging {see Radioactivity 

 well-logging) 



section gauge survey {see Section gauge) 



side-wall sampling {see Side-wall sampling) 



temperature measurements {see Bore-hole tem- 

 perature measurements) 



water location methods {see Water location 

 methods) •• 



Bore-hole logging equipment: 



amplifiers, 1098, 1100 



battery power supply, 1068 



conductor cable, 1072 



dipmeter, 1077-1079 



electrical resistance thermometer, 1064 



electrometer, 1002, 1099 



galvanometer, 1071 



gamma-ray instruments, 1097 



gun sampler, 1084-1086 



ionization chamber, 1098-1100 



measuring sheave wheel, 1056, 1069, 1072 



mechanical samplers, 1083, 1084 



neutron instruments, 1097 



photoclinometer, 1081-1083 



power supply, 1069 



pulsator, 1055, 1056 



radioactive marker bullets, 1089 



recorder, 1099, 1101 



resistivity cell, 1072 



section gauge, 1087, 1088 



sonde, 1024, 1025, 1071 



thermometer, 1064, 1072 



trucks, 1069 

 Bore-hole seismic logging, 778, 779 

 Borehole temperature measurements, 1063 



after thermal equilibrium, 1064, 1065 



before thermal equilibrium, 1066 



by geothermal gradient, 1063 



direct thermometer method, 1064 



to locate cement behind casing, 1064, 1065 



to locate lost circulation, 1068 

 Bottom-hole pressure determinations, 1122-1124, 



1133, 1134 

 Bottom-hole pressure gauge, 1124, 1125 

 Bouguer anomalies, 258, 266-268, 353, 425, 426 

 Bouguer correction, 256, 257, 402 

 Brown pendulum, 279 



