SUBJECT INDEX 



989 



Polarization: 

 abnormal -, 19, 43, 296, 316-318, 380, 



401, 405, 419, 425 

 dielectric -, 640 

 electrode -, 630 



electrolytic -, 639, 640, 757, 761-763 

 elliptical -, 626, 651-655 

 magnetic -, 16, 19, 296, 316, 318, 320 



- potential, 625, 628, 630, 631, 632, 639, 



640, 643, 762, 763 



- of radio waves, 651-656 

 spontaneous -, 628-630, 668-669, 671- 



675, 678, 762 

 Poles: 

 earth's geographic -, 88, 210-213, 326 



- of magnets, 19, 115, 302, 320, 326, 



330, 336, 343, 350, 351, 364, 374, 

 375, 378, 380, 381-384, 388-390, 

 406-408, 552, 766, 767, 785, 792 



Polybasite, density of, 77 



Pontian formation, 836, 837 



Pore volume, 76 



Porosity, 33, 62, 74-76, 474, 624, 630, 631, 

 634, 743, 830, 835, 836, 849, 864, 

 865, 869 



- and grain packing, 634-637 



- determination in wells, 831-839 

 Porous pots {see Nonpolarizable elec- 

 trode) 



Porphyrite: 

 density of -, 81 

 radioactivity of -, 874 

 Porphyritic glass, density of, 81 

 Porphyry : 

 density of -, 81 

 dielectric constant of -, 666 

 heat conductivity of -, 849 

 specific heat of -, 848 

 Position-finding, 36, 63, 64, 935, 939-940, 



949, 950, 960 

 Potash, 51, 54, 70, 274, 740 

 Potassium, 864, 870, 873 

 Potassium salt, density of, 79 

 Potential : 

 electric -, 7, 8, 25-30, 39, 298, 621, 624, 

 625, 628-633, 645, 671-675, 681-684, 

 693, 694, 697-699, 701, 707-715, 718- 

 720, 745, 746, 748, 762, 757-760, 

 762, 828, 831, 881, 882 

 electrode -, 628-630 



- gradient, 39, 88, 298, 621, 629, 633, 



670, 673, 674, 681, 683, 707, 754, 756 



- of gravity, 39, 89-94, 170, 394, 797, 



799 

 logarithmic -, 145, 150, 253 

 magnetic -, 39, 298, 381, 390, 393 



- methods, electrical, 25-30, 39, 58, 



619, 621-625, 667-764 

 Newtonian -, 145, 253 



- of a physical field, 39 



-ratios, 29, 621-623, 746-750, 752-757 



second derivative of -, 39 



self - {see Spontaneous potential) 



Potential (cont'd): 

 spontaneous - {see Spontaneous po- 

 tential) 

 vector potential of electromagnetic 

 field, 792 

 Potentil-drop-ratio method, 29, 40, 60, 

 61, 621, 622, 623, 625, 711, 744-757 

 equipment for -, 752-753 

 interpretation of -, 747-750 

 procedure in -, 752-755 

 results of -, 755-757 

 theory of -, 745-751 

 Potentiometer, 27, 29, 34, 359, 363, 365, 

 670, 678, 695, 696, 723-726, 761, 

 820, 827, 844 

 Pottery, 317 

 Power (vibrator), 922 

 Power leads, electrical effects of - {see 



Cables, electrical effects of) 

 Power lines, 328, 372, 404 

 Power stations, 333, 372, 680 

 Pre-Cambrian : 

 density of -, 81 



- formations, 284, 285, 410, 430, 432 

 resistivity of -, 661 



Precious stones, 56 

 Pressure : 

 air and gas -, 110, 118, 119, 123, 124, 



133, 856, 880, 891, 899, 900, 905, 



929 935 



- of drilling fluid, 631, 832, 842, 857 ' 



- gauge, 119, 899, 900, 932 

 gravitational - {see Gravitational 



pressure) 

 hydrostatic -, 445, 457 

 rock -, 474, 477, 914, 931, 934 

 solution - {see Solution pressure) 

 units of measurement of -, 452, 453 



Probes {see Electrodes, search) 



Productivity, 33, 831, 837, 839 



Propagation : 



- of radio waves, 810-818 



- of seismic waves, 22-25, 447-452, 



474-483, 497-499 



- of sound waves, 935-936, 943-945, 



956-958 

 Propane, 888-891, 896, 899, 902, 903, 908 

 Prospecting, 3 

 Proton, 872 



Proustite, density of, 77 

 Pseudohydrocarbons {see Hydrocarbons, 



pseudo) 

 Psilomelane, density of, 77, 78 

 Pumice stone, 74 

 Pyknometer, 71 

 Pyrargyrite, density of, 77 

 Pyrite: 

 density of -, 73, 78 



- deposits, 52, 73, 290, 292, 623, 704- 



706, 802, 804 

 elastic moduli of -, 467 

 resistivity of -, 657, 659 



