968 



SUBJECT INDEX 



Buried ridges or hills, 5, 8, 18, 45, 47, 

 70, 161, 283, 284, 296, 422, 429, 430 

 Butane, 888-891, 896, 903 

 Buzzer, 765, 774, 775, 819 



C 



Cables, electrical effects of, 701, 702, 

 766, 769, 771, 772, 776, 777, 791- 

 793, 796 

 Calcite: 



density of -, 8 



dielectric constant of -, 666 



elastic moduli of -, 467 



heat conductivity of -, 848 



resistivity of -, 658 



specific heat of -, 848 

 Calculation charts and forms: 



- for magnetometer, 333, 339, 405 



- for pendulum, 106, 123 



- for torsion balance, 200-209, 223, 



225, 229-238, 242, 245, 246, 267, 268 



- in electrical prospecting, 726, 727, 



730-733, 769, 794, 795, 804 

 Calibration: 



- of electroscopes, 879, 880 



- of gravimeters, 133, 134, 135 



- of magnetometers, 329-332, 338, 348, 



366 



- of pendulums, 118-122 



- of seismographs, 615-618 



- of torsion balance, 194-198 

 Calomel, density of, 77 

 Calorimetric methods, 848 



Camera recording and recorders, 20, 21, 



110, 111, 332, 366, 503, 552-554, 



556, 599, 608, 611, 614, 616, 617, 



828, 912, 940, 941, 943, 950, 954, 956 



Canal rays, 871, 898 



Canals, 57, 58 



Capacitive detectors (see Seismographs) 

 Capacitive strain gauges {see Ultrami- 



crometer) 

 Capacity, bearing {see Bearing capacity) 

 Capillarity, 744 

 Cap rock: 

 density of -, 84 



detail geophysical work on -, 501 

 gravity anomalies on -, 158, 274-283 

 magnetic anomalies on -, 423 

 sulfur in -, 53 

 Carbon: 



- dioxide, 894-901 



- microphone, 613, 937, 948, 960 



- seismometer, 613 



- strain gauge, 930, 931 

 Carbonates, resistivity of, 658 

 Carboniferous formation, 53, 421, 439, 



470, 473, 736 

 Cardan suspension, 102, 103, 110, 333, 



352, 353 

 Cardan suspension magnetometer, 333, 



352, 353 

 Carnallite, density of, 79 

 Cartographic correction, 226, 227 



Casing depth, 835 

 Cassiterite : 



density of -, 77 



dielectric constant of -, 666 



susceptibility of -, 310 

 Cathode-ray oscillograph (see Oscillo- 

 graph) 

 Cathodic protection, 63, 372 

 Cavendish torsion balance, 85, 175 

 Caverns : 



location of -, 815, 816 



magnetic anomalies in -, 376 

 Caving {see Mine caving) 

 Cavities, in shot holes, 489, 503 

 Cement and cementing, 34, 858-860 

 Cement rocks, 51, 54 

 Cenco pump, 899 

 Centrifugal force, 89, 92, 93-96, 123, 919- 



921 

 Centrifugal pump, 20, 491, 492 

 Chalcocite: 



density of -, 78 



resistivity of -, 659 

 Chalcopyrite: 



density of -,78 



- ore, 704, 804 

 resistivity of -, 657, 659 

 susceptibility of -, 310 



Chalk: 

 density of -, 84 



- deposits, 54 



dielectric constant of -, 666, 667 

 longitudinal wave velocity of -, 471 

 specific heat of -, 848 



Chamber, ionization {see Ionization 

 chamber) 



Channels, erosional {see Placer deposits) 



Chanute shale, 83 



Chazy shale, 84 



Chemistry: 



- of hydrocarbons, 888-891 



- of solutions, 628-639 

 Cherokee shale, 83 

 Chert, 52, 289 

 Chlorite, density of, 80 

 Chloritic slate : 



density of -,81 

 elastic moduli of -, 467 

 Chromite: 

 density of -, 78 



- deposits, 50, 52 • 

 magnetic anomalies of -, 418, 422 

 resistivity of -, 659 

 susceptibility of -, 310 



Chromium, 73 

 Chronograph, 113, 114, 950 

 Chronometer, 10, 103, 104, 107, 113, 

 116, 117 



- correction, 116, 117 * 

 ChrysocoUa, density of, 78 

 Cinnabar: 



density of -, 77 

 resistivity of -, 657 

 Circulation of drilling fluid, 856, 857 



