ADVANCES IN OIL PROSPECTING 165 
3. A. S. Eve and D. A. Keys, ‘‘Geophysical Prospecting: Some Electrical Meth- 
ods,” U.S. Bur. Mines Tech. Paper 434 (1928), 41 pp. 
4. F. W. Lee, ‘Measuring the Variation of Ground Resistivity with a Megger,” 
U.S. Bur. Mines Tech. Paper 440 (1928), 16 pp. 
5. A. Belluigi, “Un metodo elettrico d’indagine del sottosuolo,’ La Miniera 
Italiana, Vol. 13 (September, 1929), pp. 329-31. 
6. I. B. Crosby and E. G. Leonardon, “‘Electrical Prospecting Applied to Founda- 
tion Problems,”’ Geophysical Prospecting (Amer. Inst. Min. Met. Eng., 1929), pp. 199- 
211. 
7. G. Carrette and S. F. Kelly, “Discovery of Salt Domes in Alsace by Electrical 
Exploration,” Geophysical Prospecting (Amer. Inst. Min. Met. Eng., 1929), pp. 211-21. 
8. W. O. Hotchkiss, W. J. Rooney, and James Fisher, ‘‘Earth-Resistivity Measure- 
ments in the Lake Superior Copper Country,” Geophysical Prospecting (Amer. Inst. 
as Met. Eng., 1929), pp. 51-68. 
J\o Se Eve, D. A. Keys, and F. W. Lee, “Depth Attainable by Electrical Methods 
in Applied Geophysics,” U.S. Bur. Mines Tech. Paper 463 (1929). 
10. E. G. Leonardon and S. F. Kelly, “Some Applications of Potential Methods 
to Structural Studies,” Geophysical Prospecting (Amer. Inst. Min. Met. Eng., 1929), 
pp. 180-99. 
11. G. F. Tagg, ‘“The Electrical Resistance Method of Geophysical Surveying,” 
Canada Min. Jour., Vol. 50, No. 49 (December 6, 1929), pp. 1156-59. 
12. C. and M. Schlumberger, ‘“The Method of the Ground Resistivity Map and 
its Practical Application,” Canadian Min. Met. Bull. 226 (February, 1931), pp. 271— 
94; 1bid., Annales des Mines, Vol. 18, No. 9 (1930), pp. 97-127. 
. 13. A. Shaiderov, ‘‘On the Results of the Electrical Prospecting in the Region of 
Nene sien Azer. Neft., Khoz. 10, No. 9 (1930), pp. 78-85. 
“Problems of Electrical Prospecting on the Grozneft Fields,” Azer. 
Neft. ioe 10, No. 6 (1930), pp. 58-63. 
15. D. Golubiatnikov, “Electrical Prospecting in the Region of Grozny,” Za. 
Neft., Prat., 11-12; 11-14 (1930). 
16. C. and M. Schlumberger, “Depth of Investigation Attainable by Potential 
Methods of Electrical Exploration and Electrical Studies of the Earth’s Crust at Great 
Depths,” Geophysical Prospecting, Amer. Inst. Min. Met. Eng., New York, 1932, pp. 
134-40. 
7 apls Alty and S. Alty, “The Detection of Rock Salt by the Method of Electrical 
Surveying,” Canada Jour. Research, Vol. 3, No. 6 (1930), pp. 521-25. 
18. S. F. Kelly, ‘Electrical Methods for Subsoil Investigation,” Brooklyn Eng. 
Club Proc., Vol. 28, No. 3 (1930), pp. 22-41. 
19. F. "W. Lee and J. H. Swartz, ‘Resistivity Measurements of Oil-Bearing Beds,”’ 
U.S. Bur. Mines Tech. Paper 488 (2930). 
20. C.and M. Schlumberger, “Memoire sur la méthode de la carte des résistivités 
et ses applications pratiques,” Congrés Inst. d. Mines, Met. et de la Géologie Appl. 
(Liége, June, 1930). 
21. Helmer Hedstrom, ‘‘Geo-Electrical Exploration Methods,” The Oil Weekly, 
Vol. 58, No. 6 (July 25, 1930), pp. 34-36. 
22. W. P. Jenny, “Flectric and Electromagnetic Prospecting for Oil,” Bull. Amer. 
Assoc. Petrol. Geol., Vol. 14, No.9 (September, 1930), pp. 1199-1214. 
23. N. Gella, "“Geo- Electric Investigations of Non-conductors; Four New Ex- 
amples,” Bull. Amer. Assoc. Petrol. Geol. , Vol. 14, No. 9 (September, 1930), pp. 1165-76. 
24. K. Sundberg, ‘Electrical Prospecting for Oil Structure,” Bull. Amer. Assoc. 
Petrol. Geol., Vol. 14, No. 9 (September, 1930), PP- 1145-63. 
25. E. E. Carpenter and E. G. Leonardon, ‘‘Geophysical Studies Predict Rock 
Conditions at Tunnel Site,” Engineering News Record (September 4, 1930). 
26. A. B. Edge and aN Jab Laby, Principles and Practice of Geophysical Prospecting: 
II (2B) and VII (2): “Resistivity Methods” (Cambridge, 1931) 
27. H. A. Buehler, Missouri Bur. Geology and Mines Biennial Retort (Rolla, 
1931), Pp. 15-16, and Appendix III, pp. 146-61. 
W. J. Rooney, “The Use of Resistivity Measurements in the Detection of 
Vea Areas,” Intern. Geod. and Geophys. Union Bull. 8 (Paris, 1931), Sec. Terr. 
Magn., pp. 352-53. 

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