990 



SUBJECT INDEX 



Pyrite (cont'd): 



spontaneous polarization of -, 630, 

 668, 669, 676 



susceptibility of -, 310 

 Pyrolusite: 



density of -, 78 



resistivity of -, 657 



susceptibility of -, 310 

 Pyreoxene : 



density of -, 80 



elastic moduli of -, 467 

 Pyroxenite, density of, 80 

 Pyrrhotite, 8, 51, 73, 289, 297, 309, 317, 

 415, 416, 676, 704, 802 



density of -, 73, 78 



- deposits, 289 



magnetization of -, 310, 314, 317 

 resistivity of -, 657, 659 

 spontaneous polarization of -, 668, 676 



Q 



Quadrature component {see Electro- 

 magnetic field, quadrature com- 

 ponent of) 

 Quartz : 



density of -, 73, 80 



dielectric constant of -, 665 



heat conductivity of -, 848 



resistivity of -, 658, 661 



specific heat of -, 848 



susceptibility of -, 310 

 Quartz-diorite, density of, 80 

 Quartz-porphyrite, density of, 81 

 Quartz porphyry: 



density of -, 73, 81 



radioacitivity of -, 874 



resistivity of -, 660 

 Quartz sand: 



density of -, 83 



- deposits, 55 



heat conductivity of -, 849 



specific heat of -, 848 

 Quartz veins, 29, 50, 52, 624, 754-756 

 Quartzite: 



elastic moduli of -, 467 



longitudinal wave velocity of -, 472 



radioactivity of -, 875 

 Quartzitic slate: 



density of -, 81 



elastic moduli of -, 467 

 Quasi-stationary fields (see Fields, 

 quasi-stationary) 



R 



Racom {see Ratiometer) 

 Radiation: 

 electromagnetic -, 651, 652, 810, 811, 

 871-873 



- impedance, 477-479, 959 

 penetrating -, 35, 54, 863, 864, 871-873, 



876-879, 881, 884, 885 

 radioactive - {see Radioactive radi- 

 ation) 



Radio-acoustic position-finding, 63, 937, 



940, 949-951 

 Radioactive : 



- gases, 35, 870-875, 880, 885 



- ores, 9, 35, 51, 52, 854, 865, 875 



- radiations, 35, 863-865, 871-873, 878- 



885 



- waters, 61, 870, 873-875, 881, 883, 884 

 Radioactivity, 9, 35, 51, 52, 54, 870-876, 



878-881, 883-885 

 effect of -, on earth temperatures, 



853, 854 

 equilibrium in -, 873, 876 

 measurements of -, 9, 35, 42, 51, 52, 55, 



61, 876-883 



- methods, 9, 35, 51, 52, 54, 55, 61, 



870-885 

 operation of -, 876-881 



- of rocks, 873-876 



-well logging, 35, 42, 863-865, 876, 883 



Radio frequencies allotted to geophys- 

 ics, 496 



Radio methods, 32, 58, 63, 623, 627, 628, 

 809-818 



Radio receivers, 114-116, 496, 497, 815- 

 819, 823, 824 



Radio signal transmission: 



- in pendulum work, 10, 106, 113-117 



- in radio-acoustic ranging, 950-951 



- in radio methods, 812-818 



- in seismic prospecting, 20, 496, 497, 



503 

 Radio transmitters, 114, 115, 116, 496, 



497, 812, 815-817, 819, 823, 824 

 Radio waves: 

 attenuation of -, 811, 812 

 elliptical polarization of - {see 

 Elliptical polarization of radio 

 waves) 

 Radium, 870, 871-874, 877, 878, 884 _ 



- emanation {see Emanation, radium) 



- ore 9, 35, 51, 52, 854, 865, 874, 875 

 Radon {see Emanation, radium) 

 Railroad: 



- construction, 6 



- investigations, 6, 57, 58, 915, 928 

 magnetic effects of -, 372, 374, 404, 405, 



680 

 Ramann effect, 898 



RAR system {see Radio-acoustic posi- 

 tion-finding) 

 Ratio bridge {see Ratiometer) 

 Ratio compensator {see Ratiometer) 

 Ratiometer: 



electromagnetic -, 30, 31, 753, 754, 764, 

 779, 785, 786, 789, 803, 804 



potential -, 30, 31, 40, 752-755, 785 

 Rayleigh wave, 450, 451, 452, 473, 551 

 Rays: 



alpha - {see Alpha rays) 



beta - {see Beta rays) 



gamma - {see Gamma rays) 



seismic - {see Seismic waves) 



