INDEX 



293 



Hardness, of common minerals, 16 



of strata, 15 

 Hatch, Dr. F. H., quoted, 182 

 Haussmann, Dr. K., quoted, 206, 



216, 220 

 Haussmann's apparatus, 185 

 Heiland, Dr. C, quoted, 245 

 Hillmer's apparatus, 136 

 Hoffmann, J. I., quoted, 183, 185 

 Horizontal boreholes, 32 



problems, 253 

 Hydrofluoric acid, 97, 98, 108 



Illumination of borehole walls, 177, 



179 

 Inclined strata, 17 

 Incorrect centering at surface, 15 

 Incorrect plumbing adjustment, 45 

 Inclination measurer (Haussmann's), 



188 

 Inclined borehole problems, 250 

 Inclinometer, 171 

 Inertia-rotor method of survey, 48, 



87 

 Inexpert tiller work, 29 

 Inking device, 174 

 Instrumental survey of boreholes, 46 

 Irregularities in borehole diameter, 



29 



Jahr's depth and thickness method, 



22 

 Jarring at core, 20 

 Jennings, J., quoted, 19 

 Justice, J. N., cited, 8, 31 



K 



Kegel's apparatus, 146 

 Kendall's apparatus, 58 

 Kiel Nautical Instrument Com- 

 pany's apparatus, 211 

 Kind's method, 55 

 Kinley's apparatus, 171 

 Kiruna method, 113 



Kitchen, Joseph, quoted, 2, 8, 17 

 Koebrich, A, cited, 55 

 Koebrich's apparatus, 60 

 Koerner's borehole survey device, 



153 

 Koerner's core orientator, 74 



Laboring of rig gear, 10 



Lahee, Prof. F. H., quoted, 37, 54 



Lame's coefficient, 235 



Lamps, 177, 188 



Lapp's core orientator, 74 



Lapp's stratigraph, 25 



Latitude and gyro-action, 209, 212 



Lengths of boreholes, 248, 250, 252, 



263 

 Lesser deflection records, 41 

 Levels, 191, 220 



Literature index abbreviations, 280 

 Log checks, 9 

 Love's waves, 237 



M 



Maas' method, 108, 109 

 Macfarlane's apparatus, 111 

 MacGeorge's clinograph, 101 

 MacGeorge's clinometer, 104 

 MacGeorge's core orientator, 63 

 MacGeorge's guide tube, 107 

 Macready, G. A., quoted, 48, 55, 92 

 Macready's method, 91 

 Magnetic needle methods, 47, 80, 



88, 91, 99, 102, 113, 132, 134, 



138, 194 

 Magnetism of rods, 19 

 Magnets, 191 

 Maillard's apparatus, 148 

 Malamphy's seismic method, 240, 



242 

 Manometer, 32 

 Marriott, H. F., cited, 15 

 Marriott's continuously recording 



device, 126 

 Marriott's intermittently recording 



device, 128 

 Martienssen, Dr. 0., quoted, 216 



