INDEX 



295 



Rapoport's method, 76 



Rayleigh waves, 237 



Recorders, 160, 169, 172, 187, 219 



Records, 192, 196, 198 



Redmayne, Sir R. A. S., cited, 55, 



64, 112 

 Reduction of borehole diameters, 18 

 Registering apparatus, 189, 219 

 Reinhold's apparatus, 179 

 Requirements for successful survey, 



46 

 Rigidity, of gyrocompass, 209, 222 



of rods, 17 

 Rod abrasions, 10 

 Rods, 1 



Rope recorders, 36 

 Rotation of rods, 20 

 Riihland's apparatus, 100 

 Rumanian boreholes, 4 

 Rumpf and Kleinhenn's apparatus, 



29 

 Russian boreholes, 4 



S 



Sag of plumbing rope, 45 

 Schlumberger brothers quoted, 227 

 Schlumberger's method, 229 

 Schmidt, Prof. F., quoted, 41, 44 

 Scoring of core-box or casing, 10 

 Seismic methods, 233, 236, 242 

 Seismograms, 237, 239 

 Seismograph, 239 

 Seminole oilfield boreholes, 6, 52 

 Shaped notches, 47 

 Shortest borehole of all, 255 

 Shortest possible borehole at given 



bearing, 254 

 Sinking shaft borehole, 262 

 Six's thermometer, 35 

 Slanting boreholes, 255, 266, 274 

 Small boreholes, 18 

 Small diameter instrument (Kiruna), 



113 

 Snow, D. R., cited, 6 

 Special joints, 162 

 Special three borehole problems, 273 

 Specific resistivity of rocks, 230 

 Sperry gyrocompass, 83, 220 



Sperry-Sun apparatus, 220 

 Sperry-Sun Company's borehole 



model, 40 

 Spin of boring tools, 20 

 Spinning axis, 205 

 Spontaneous polarization, 223 

 Static electricity of rods, 19 

 Strata profiles, 9 

 Stratameter, Gothan's, 64 



Meine's, 67 



North German Company's, 71 



Thurmann's, 70 

 Stratigraph, Foraky's, 27 



Jahr's, 22 



Lapp's, 25 

 Strike of bedding, 248, 256 

 Strip films, 91, 157, 173, 177, 179, 



183, 189, 221 

 Stiitzer, Dr. Otto, quoted, 1 

 Surface receivers, 169, 219 

 Survey of boreholes, instrumental, 



46 

 Surwel gyroscopic clinograph, 220 

 Swedish clinometer-goniometer, 105 

 Switches, 190 



"Take-up" motor, 213 

 Teleclinograph, 166, 171 

 Temperature measuring devices, 34 

 Thermal surveys, 34 

 Thermometers for boreholes, 35, 222 

 Thickness of beds, 256, 260 

 Thiele, P., cited, 33 

 Three-borehole problems, 269, 271 



all slanting, 274 



special cases, 273 

 Thurmann's borehole model, 39 

 Thurmann's borehole survey appara- 

 tus, 162 

 Thurmann's stratameter, 70 

 Time-travel curves, 244 

 Timing device, 200 

 Torque, 205, 206 

 Total depth problems, 252, 253 

 Tjansmitters, 171, 216 

 Transverse seismic waves, 235 

 True dip, 256 



