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1 WOODS I 



V HOLE, 



\ MASS / 

 CONTENTS \»^»^--'^^ 



^V i^ ^ .^^^ Page 



Editor's Foreword 7 



Part I — Seismology 



1. Intensities of Refracted and Reflected Longitudinal Waves at 



Angles of Incidence below Critical 11 



V. P. Go RB AT OVA 



2. Method and Techniques of Using Stereographic Projections for 



Solving Spatial Problems in Geometrical Seismics 44 



E. I. Gal'perin, G. a. Krasil'shchikova, V. I. Mironova and 

 A. V. Frolova 



3. Multiple Reflected Waves 75 



S. D. Shushakov 



4. Diffracted Seismic Waves 99 



T. I. Oblogina 



Part II — Gravimetry 



5. The Influence of Disturbing Accelerations when Measuring the 



Force of Gravity at Sea using a Static Gravimeter 123 



K. Ye. Veselov and V. L. Panteleyev 



6. Evaluating the Accuracy of a Gravimetric Survey, Selecting the 



Rational Density of the Observation Network and Cross-sections 



of Isoanomalies of the Force of Gravity 139 



B. V. Kotliarevskii 



Part III — Electrical Sonde Methods 



7. Theoretical Bases of Electrical Probing with an Apparatus Immersed 



in Water 169 



E. I. Terekhin 



8. The Use of New Methods of Electrical Exploration in Siberia 196 

 A. M. Alekseev, M. N. Berdichevskii and A. M. Zagarmistr 



9. The Method of Curved Electrical Probes 223 



M. N. Berdichevskii 



10. The Use of the Loop Method (Spir) in Exploring Buried Structures 241 

 I. I. Krolenko 



11. Allowance for the Influence of Vertical and Inclined Surfaces of 



Separation when Interpreting Electric Probings 271 



V. I. FOMINA 



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