SUBJECT INDEX 



969 



Clairaut's theorem, 89, 90-96, 136, 190 

 Clay: 

 density of -, 74-76, 82 



- deposits, 54 



dielectric constant of -, 666, 667 

 heat conductivity of -, 849 

 longitudinal wave velocity of -, 469 

 resistivity of -, 637, 658, 661, 664 

 specific heat of -, 848 

 susceptibility of -, 312 

 Coal: 

 density of -, 79 



- deposits, 51, 53, 287, 740, 886 

 heat conductivity of -, 848 

 resistivity of -, 658 



specific heat of -, 848 



susceptibility of -, 312 

 Coal removal, effect on gravity, 167 

 Coast : 



- effect on gravity, 166, 241, 242 



- effect on gravity gradient, 241, 242 

 Cobaltbloom, density of, 78 

 Cobaltite, density of, 77 



Cobalt ore, 52 



spontaneous polarization of -, 668 

 Coefficients {see aZso Constants): 



absorption -, 480, 481, 652, 845, 936, 

 944, 958 



anisotropy -, 700, 852 



attenuation - (see absorption -) 



curvature -, 173, 174 



dilation -, 443-445 



dissipation -, 483 



expansion -, 327, 328, 337, 338 ■ 



instrument -, 178-189, 192-198 



Larn^ -, 445^48 



mass-absorption -, 873, 881 



Poiseuille -, 481-483, 936 



reflection -, 478, 712 



stiffness - (see Constant, spring -) 



temperature, 118, 133, 196, 197,327,328, 

 331, 338, 367 



terrain -, 217-225 



torsion -, 85, 88, 130, 131, 177. 178, 

 185, 193-199, 353, 598-600 



viscosity - {see Poiseuille -) r 

 Coercive force, 307, 309, 315, 316, 401 

 Coil: 



Helmholtz -, 330, 331, 338, 363, 366,403 



reception -, 30, 39, 763, 765, 773,776, 

 778-786, 807, 819-822, 824 

 Coincidence: 



- interval, 103-106, 108, 117-119, 121, 



122, 135 



- method, 10, 103-108 

 stroboscopic -, 104, 105, 106 



Colorimetric analysis, 901 



Colpitt oscillator, 931 



Combustion of hydrocarbons, 895-896 



Communication: 

 acoustic -, 63, 935, 939, 946, 949, 960 

 radio -, 114, 115, 496, 503, 555, 809 

 wire -, 494, 495, 504, 555, 656 



Commutator, 29, 304, 644, 723, 724, 826, 



827, 953 

 Compaction, 75, 76, 915, 921, 922 

 Compander, 552, 554 

 Comparator : 



electrical - {see Ratiometer) 



optical -, 99 

 Compass : 



American mining -, 346 



dial -, 17, 346, 403 



dipping - (Louis), 346 



Swedish mining-, 17, 319, 320, 345, 346 



- variometer, 365, 376 



Wilson compass attachment, 352 

 Compensation : 

 acoustic - (see Compensator) 

 electrical - (see Compensator) 



- inductor, 363 

 Compensator : 



acoustic -, 938, 939, 942, 949, 949, 951 , 



952, 961 

 electrical -, 28, 30, 40, 624-626, 648, 

 695, 696, 726, 758, 760, 765, 766, 

 779, 781-785 

 gravity -, 87, 88 

 magnetic -, 301, 348, 350, 351 

 Compressibility, 446, 457, 458, 467, 468 



tests of -, 457, 458 

 Compression, 442, 443 

 Compression (= flattening), 95 

 Compressional wave, 448 

 Concentration: 



- of currents {see Current concentra- 



tion) 



- of gases, 884, 885, 903, 905-907, 909 



- of magnetic materials, 297, 318, 416 

 mechanical concentration deposits, 49, 



51, 297, 318, 416 



- potential {see Diffusion potential) 



- of radioactive materials, 864, 870, 



875, 885 

 Condenser microphone, 552, 610-612, 948 

 Condenser-microphone strain gauge, 456, 



931, 932 

 Conduction: 

 dielectric -, 26, 640, 641 

 electrolytic -, 26, 633-640 

 electronic - (metallic), 26, 632-634 

 Conductive surface layers, 652, 702, 743, 



805, 809 

 Conductivity, electrical (see also Re- 

 sistivity), 26, 28, 622, 628, 631, 

 632-637, 639, 640, 641, 649, 650, 

 652, 655, 656, 685, 688, 707, 708, 

 721, 727-730, 741, 743, 791, 796- 

 800, 811 

 apparent -, 721, 727-730, 800 

 Conductivity, heat (see Thermal con- 

 ductivity) 

 Conglomerate: 

 density of -,83 

 gold -, 49, 419 

 resistivity of -, 662 



