974 



SUBJECT INDEX 



Electric (al) (cont'd): 



stationary and quasistationary -, 



681-684 

 vertical component of -, 652-654 



- logging, 8, 28, 33, 34, 41, 44, 45, 623, 



625, 744, 825-840, 843 

 detection of water flows by -, 834 

 dip determinations by -, 834, 835 

 electrode arrangements in -, 826, 827 

 resistance and impedance measure- 

 ments in -, 825-831 

 spontaneous potential (porosity) 

 measurements in -, 831-833 



- methods, 25, 50, 51, 52, 54, 619-624 

 classification of -, 624-628 

 fundamentals of -, 619-624 

 operation of, 670-671, 692-695, 708, 



723-726, 754, 764, 774, 779, 786, 793, 

 803, 806 



- prospecting (see Electrical methods) 



- seismographs, 20, 551, 552, 592-597, 



601-607, 609-613, 912, 917, 932 



- surveys, 675-681, 703-706, 735-744, 



755-757, 761, 771-773, 801-808 



- transients (see Eltran and Transients, 



electric) 

 Electrochemical : 



- method, 761-763 



- phenomena, 622, 624, 628-633, 637, 



639, 667, 668, 679, 680, 757, 761, 

 762, 831-833 

 Electrode : 



- arrangements, 709-711, 715, 745, 747, 



752, 826, 827 



- basis, 683, 711, 745, 754 



- clamps, 642, 643 

 current - (see power -) 

 energizing electrode (see power -) 

 expanding electrode system, 747- 



749 754 

 line -, 27, 30, 624, 693, 694, 764 

 mercury -, 643 

 nonpolarizable -, 26, 629, 630, 669, 670, 



692, 725, 758, 763, 827 

 point -, 27, 30, 624, 682, 683, 764 

 polarization of -, 630, 669, 675 

 porous pot - (see nonpolarizable -) 

 potential - (see search -) 

 power -, 27, 30, 682, 683, 692-694, 707, 



708, 709-711, 745, 751, 752, 754, 



758, 762, 764, 773, 826, 827 

 primary - (see power -) 

 resistance, 642, 643, 753, 827 

 search -, 619, 625, 670, 671, 678, 692- 



696, 701, 707-716, 745-749 

 secondary - (see search -) 

 self-watering -, 695 



- spacing, 670, 671, 694, 695, 708, 716, 



718, 721, 726-732, 735, 736, 745- 



749, 758, 763, 765, 773, 826-830, 



834 

 Electrofiltration, potential, 33, 624, 631, 



668, 831-833 

 Electrolytic phenomena, 629, 632, 633, 



637, 757, 831-833 



Electromagnetic field, 7, 25, 30, 621, 



622, 625, 626, 642, 763-807, 815- 



819 821 

 absorption of -, 685, 792, 811-813. 815, 



816 

 horizontal components of -, 30-32, 



765-773, 776-778, 784, 785, 787- 



796, 800-807, 810 



in-phase components of -, 30-32, 622, 

 625, 626, 695, 696, 764, 765, 769, 

 779, 782-785, 787, 788, 792-794, 796, 



797, 800-804' 



- of loops, 776-779 



- of ore bodies, 770-772, 787, 789, 790, 



791, 800-805, 807, 808 

 out-of-phase component of - (see 



quadrature components of -) 

 phase differences of -, 30, 31, 769, 779, 



783-789, 791, 793 

 polarization of -, 764, 778, 779, 783, 



784, 786-789, 807, 818 

 quadrature components of -, 30-32, 



622, 625, 626, 764, 769, 779, 782- 



785, 787-789, 792-794, 796, 797, 

 800-805 



ratios of -, 30, 31, 622, 764, 785, 786, 



803, 804 

 vertical components of -, 30-32, 765- 

 773, 776-779, 784, 785, 787-789, 

 791-794, 796-803, 807 

 Electromagnetic methods, 25, 55, 619, 

 621-623, 625, 626, 690, 763-809 

 Ambronn's method, 625 

 Bieler-Watson method, 626, 783-785, 806 

 depth range, 763 

 Elbof method, 626, 771 

 galvanic -, 7, 8, 25, 30, 31, 32, 39, 



764-773 

 horizontal loop methods, 774-805 

 inductive -, 5, 7, 8, 25, 26, 31, 32, 39, 

 45, 61,- 621-623, 625, 626, 773-809 

 Mason method, 626, 806 

 Radiore method, 626, 648, 806-809 

 ring induction method, 626, 648, 



782, 796 

 Sundberg method, 626, 791-796 

 Lundberg-Sundberg method, 625, 771, 



779 

 Muller method, 626, 772 

 vertical loop methods, 626, 805-809 

 Electromagnetic radiation, 651, 652, 



810-812, 871-873 

 Electrometer, 876-881, 898 

 Electrons, 353-355, 871-873, 882 

 Electroscope, 876-881, 898 

 Elements: 



- of earth's magnetic field, 293, 295 

 resistivities of -, 657, 658 



Elevation correction (see Correction, 



elevation) 

 Elinvar, 10, 113 

 Ellipse, 653-655, 687-693, 764, 766, 772, 



778, 779, 783, 784, 786, 788, 789, 



818 



