SUBJECT INDEX 



977 



Frequency (ies) (cont'd): 



- range, in electrical methods, 25, 31, 



619, 642, 685, 686, 694, 752, 763, 774, 

 809, 811, 812, 819 



- i-atio {see Tuning factor) 

 resonance - (seismic), 461, 462, 481, 



482, 588, 601, 616, 814, 815, 918, 921, 

 922 



- response: 



of ground 36, 441, 493, 911, 912, 915, 



918, 921-925 

 of rock specimen, 461, 481 

 of seismographs, 586-591, 593, 594, 



597, 598, 601-606, 616-618 

 of structures, 36, 62, 441, 911, 912, 



915, 919 



- of seismic waves (see also Frequency, 



ground), 449, 452 

 ultrasonic - (see Ultrasonic trans- 

 mission) 

 Friction, 582, 583, 615 



- angle, 922 



G 



Gabbro : 



coercive force and remanent magne- 

 tization of -, 316 



density of -, 80 



elastic moduli of -, 467 



radioactivity of -, 874 



resistivity of -, 660 



susceptibility of -, 313 

 Gaede pump, 899 

 Gal (unit), 10, 13, 88 

 Galena: 



density of -, 77 



- deposits, 417, 804 

 resistivity of -, 657, 659 



Galvanic-electromagnetic methods (see 



Electromagnetic methods) 

 Galvanometer: 

 astatic -, 359 

 ballistic -, 305-307, 359, 360, 361, 363, 



893, 894 

 bifilar-, 21,552, 598, 600 

 coil -, 21, 552, 598, 599, 600 

 - in earth inductors, 359,-361, 363 



- in electrical logging, 826, 827 



- in electrical receiving devices, 626, 



644, 646, 651, 670, 671, 692, 693, 

 723-725, 762, 778, 780, 783, 814-816, 

 824 



- in gas detectors, 892, 893 



- on Geiger counters, 864 

 loop-, 359, 609, 893 



response of-, 600-603 



seismic -, 495, 496, 504, 552, 555, 593, 



595, 598-607, 617, 618 

 sine -, 365, 366 

 string -,21, 359, 552, 598-601 

 tangent -, 365 



- for temperature recording, 844 

 Gamma (magnetic unit), 16, 19, 296, 412, 



414-417, 419-426, 428, 430, 432-436 



Gamma rays (radiation), 35, 54, 863, 864, 

 871-873, 876, 878, 879, 881, 884, 885 



Gamma-ray well logging, 35, 42, 863- 

 865, 876, 883 

 I Garnet, density of, 80 



Garnet gneiss, resistivity of, 660 



Garnet schist, heat conductivity of, 849 



Gas: 



- analysis, 5, 35, 868, 885-910 

 composition of -, 890 



- constant, 629, 631 



- detection, 9, 64, 866, 868, 869, 886, 



887, 892-898 



- detector, 64, 868, 869, 892-898 

 emanations of -, 35, 886, 887, 902-906 



- leaks, 9, 35, 868 



- in rock pores, 76, 887, 892, 898 



- in wells, 34, 825, 842, 856, 866, 868, 869 

 Gauge, strain (see Strain gauge) 

 Gauss (magnetic unit), 16, 295, 296, 298, 



299, 308, 766, 793-795, 797 

 Gauss positions, 300, 325, 329, 336, 338, 



351 

 Gauss tangent method, 349, 365 

 Gaylussite, density of, 78 

 Geiger-Mueller counter, 864, 876, 878, 



881-884 

 Gems, 56 

 Generator, electric, 645, 692, 694-696, 



724, 725, 758, 763-765, 774, 775, 781, 



783, 807, 821, 823, 916, 947, 956 

 acoustic - (see Sound transmitter) 

 Geoacoustic methods, 956-963 

 Geocentric coordinates, 92 

 Geochemical prospecting, 885-910 

 Geodetic triangulation, 168, 169 

 Geoid, 167, 168 

 Geological applications : 



- in engineering (see Engineering) 



- in mining (see Mining exploration 



and Engineering, mining) 



- in oil exploration (see Oil exploration) 

 Geologic bodies, 4, 7, 10, 11, 16, 38, 42, 



67, 143, 144, 169, 247, 250-254, 293, 



295, 377, 381, 389, 437, 439, 621, 



622, 697, 707, 764 

 two-dimensional -, 144-146, 150-157, 



169, 243, 247, 251, 252, 254, 257-270, 



385-388, 395-400, 768 

 three-dimensional -, 144-150, 153, 250, 



253-258, 265, 266, 269, 270, 375, 



381-385, 390-395 

 Geologic history, effect on magnetic rock 



properties, 296, 315, 317, 318 

 Geologic structure (see also Structural 



studies), 4, 5, 8, 10 

 Geophone (see also Seismograph), 20, 58, 



580, 591, 866, 959, 960, 961 

 Geophysical exploration: 

 definition of -, 3, 4, 38 



- in engineering {see also Engineering), 



6, 8, 57-64 

 indirect -, 5, 6 

 major fields of -, 5, 6 

 measurement procedures of -, 38-42 



