CONTENTS 



Page 



CHAPTER I 

 Deviation and Its Causes 1 



CHAPTER II 

 Auxiliary Registrations in Borehole Surveys. ... 22 



CHAPTER III 

 Instrumental Survey of Boreholes 46 



CHAPTER IV 

 Core Orientation 54 



CHAPTER V 

 Fluid Methods of Surveying Boreholes. ...... 95 



CHAPTER VI 

 Compass and Plumb-bob Methods 121 



CHAPTER VII 

 Pendulum Methods 153 



CHAPTER VIII 

 Photographic Methods 175 



CHAPTER IX 

 Gyroscopic Compass Methods of Surveying Boreholes 204 



CHAPTER X 

 Geophysical Methods of Investigating Boreholes . . 225 



CHAPTER XI 

 Problems . 246 



CHAPTER XII 

 Bibliography 281 



Index 291 



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