Subject index 



427 



at sea, theoretical curves for, 183-95 



at sea, theory of, 170-8 



two-way, 196-206 

 Electrical surveys, 



by loop method (see Loop method) 



mobile units for, 214-21 

 Electron logging, 



of rock strata, 419-21 



Kaolin, optical properties, 330 

 Kerch peninsula, 



geophysical data, 241-2, 244-5, 247, 263 



gravitational field, 248 



seismic exploration, 250 



Gamma-gamma logging, of rock strata, 408-9 

 Gamma-neutron logging, 381-9, 409-17 



for oil, 414 

 Gamma quanta generator, construction of, 



417-9 

 Gas factor, of oil-bearing strata, 313 

 Gas logging, factors affecting, 301-5 

 Gas saturation, 



of driUing fluid, effect of boring rate on, 

 280, 305, 310 



estimation of, 302 



fluid, factors affecting, 302 



of rocks, estimation, 302-5 

 Gravimeter, static, for use at sea, 123-38 

 Gravimetric surveys, 



accuracy of, 140-2 



of Kerch peninsular, 248 



observational errors, 144-6 



of Russian basins, 160-1 



source of errors in, 144-7 

 Grazing rays, spatial direction, 52 

 Gypsum-anhydrite, and multiple wave reflec- 

 tion, 85 



H 



Head waves, intensity, 28-30, 33-35 



Hodographs, 



construction for reflected waves, 55-73 

 of diffracted waves, 101, 114-7 

 theoretical, for multiple reflections, 82 



Infra-red photography, of rocks, 338 

 Intensity of seismic waves, 14--43 

 Isochrone chart, for waves reflected from 

 dome, 62 



Lame constants, 15 



Leningrad tables, 27 



Light transmittance, of clay suspensions, 



331 

 Logging, 



gamma-gamma, 408-9 



gamma neutron, 409-17 



gas, 84, 301-14 



luminescence, 315-27 



radioactive, 397-421 

 Longitudinal seismic waves, intensity, 11^3 

 Loop method, 



developments in, 244-63 



economics of, 265 



errors in, 251 



geological surveys by, 244^59 



principles of, 241 



uses of, 242-4, 251, 266 

 Luminescence, 



of drilling fluid, 319 



of oil, 319-20 



of oil-chloroform solutions, 320-1 



oil deposit logging by, 285-97, 315-27 

 Luminoscope, photoelectric, design of, 

 286-9, 316-319, 326 



M 



Mesozoic deposits, 201, 204, 210, 250 

 MobUe units, for electrical surveys, 214-21 

 Moscow syncUnal basin, gravimetric survey, 



160-1 

 Multi -layered media, 



reflected wave intensity in, 40 

 refracted primary waves in, 40 

 surface hodograph for reflected waves 

 in, 62-73 



