INDEX 



Absolute check on survej^s, 53 

 Accuracy of borehole surveys, 50 

 Acid-bottle record, 53, 95 

 Action of gyrocompass, 208 

 Advantages, of fluid methods of 



survey, 97 

 of seismic methods, 245 

 Alignment charts for deviated holes, 



276, 278 

 Ambronn, A., cited, 34, 229 

 Anderson, A., quoted, 5 

 Anderson's apparatus, 200 

 Anschiitz apparatus, 216 

 Anschiitz-Kaempfe's device, 10 

 Anschiitz-Kaempfe's gyrocompass, 



206 

 Apsidal angle and plane, 114 

 Atwood's apparatus, 176 

 Audible or acoustic device, 11 

 Auxiliary registrations, 22 

 Axial dip in gyrocompass, 211 

 Azimuth gyroscope, 204 



B 



Bailing ropes, 1 



Basket or lantern method of plumb- 

 ing, 41 

 Batteries, drj^ 177, 179, 183 

 Bawdon's apparatus, 134 

 Bearing of boreholes, 264 

 Benzine wash, 181 

 Bibliography, 283 



Boreholes not at right angles to 

 strata strike, 255 

 to particular points, 261, 262 

 at right angles to strata strike, 

 248 

 Briggs' clinophone, 141 



Briggs' horizontal clinoscope, 33 

 Briggs' transmitter and receiver, 141 

 Brindel's chart, 276 

 Bubble log and oscillations, 224 

 Burbach borehole pressure recorders, 

 31 



Californian boreholes, 5 



Camera devices, 78, 176, 179, 186, 



223 

 Casing, 10 



Centering devices, 153, 156, 164 

 Channing Park, cited, 8 

 Chanslor-Canfield borehole model, 



39 

 Check surveys, 53 

 Circulating water, 10 

 CHnographs, 101, 220, 224 

 Clinometers, 104, 193, 198 

 Clinophone, 141 

 Clockwork, 59, 81, 87, 110, 123, 132, 



137, 151, 156, 161, 220 

 Comparison of methods of survey, 



52, 53 

 Compass methods, 121, 139, 181, 193 

 Conductivities of rocks, 230 

 Constrained gj^roscope, 205 

 Continuous registrations, 22, 30, 



36, 84, 94, 126, 145, 161, 166, 



193, 223 

 Controller, 196 

 Cooke, Prof. L. H., cited, 19 

 Copper sulphate method, 114 

 Core orientation, 48, 54 

 Core spin, 19 

 Correction device, 184 

 Cosine method, 276 

 Costs of borehole surveys, 50 

 Counter-dip borehole problems, 248, 



249 



291 



