164 C. A. HEILAND 
rr. C. and M. Schlumberger, and E. G. Leonardon, “Electrical Coring; A Method 
of Determining Bottom-Hole Data by Electrical Measurements,” Amer. Inst. Min. 
Ma. Eng. Teck. Publ. 462 (New York, February, 1932). 
12. S. F. Kelly, “A uniform expression for resistivity,” Geophysical Prospecting 
(Amer. Inst. Min. Met. Eng., New York, 1932), pp. 141-43. 
i. THEORY OF RESISTIVITY METHODS 
1. Frank Wenner, “A Method of Measuring Earth Resistivity,” U.S. Bur. Siand- 
ards Ser. Paper 258; ibid. Bull. 12 (4) (October, 11, 1915), pp. 469-78. 
2. Warren Weaver, “‘Certain Applications of the Surface Potential Method,” Geo- 
phystcal Peaspechne (Amer. Inst. Min. Met. Eng., 1929), pp. 48-87. 
3. F. W. Lee, J. W. Joyce and Phil Boyer, “Some Earth Resistivity Measure- 
ments,” U.S. Bur. Mines Inf. Circ. Gre (October, 1929). 
4. C. Schlumberger, Fiude set la prospection électrique du sous-sol, 2nd ed. 
(Gauthier-Villars, Paris, 1930), 96 
5. L. J. Peters and John ale “The Solution of Some Theoretical Problems 
Which Arise in Electrical Methods of Geophysical Exploration,” Univ. of Wisconsin 
Bull. Eng. Exper. Station, Ser. 71 (Madison, 1930), 88 pp. 
6. S. Stefanesco and C. and M. Schlumberger, “Sur la distribution électrique po- 
tentielle autour d’une prise de terre ponctuelle dans un terrain homogéne 4 couches © 
horizontales, homogénes et isotropes,” Le journal de Physique e le Radium 7, t (4) 
ee Pp. 132-49. 
. N. Hummel and W. Heine, “Die elektrischen Methoden der angewandten 
Geophisik,” Handbuch der Experimentalpkysik, Vol. 25, No. 3 (1930), pp. i 
. W. Weaver, “Mathematics and the Problem of Ore Location,” Amer. M. 
Monti Vol. 37 (April, 1930), pp. 165-81. 
. E. Lancaster Jones, “The Earth Resistivity Method of Geophysical Prospect- 
saat Mining Mag., Vol. 42, No. 12 and Vol. 43, No. 1 (June and July, 1930), pp. 355— 
60 and 19-28. 
1o. G. F. Tagg, “The Earth Resistivity Method of Geophysical Prospecting” 
(some ‘theoretical considerations), Mining Mag., Vol. 43, No. 3 "(September 1930), 
pp. 150-58. 
11. D. O. Ehrenburg and R. J. Watson, “Mathematical Theory of Electrical 
Flow in Stratified Media with Horizontal Homogeneous and Isotropic Layers,” Geo- 
physical Prospecting (Amer. Inst. Min. Met. Eng.) New York, 1932, pp. 423-42. 
12. J. N. Hummel, “A Theoretical Study of Apparent Resistivity in Surface Po- 
tential Methods,” Geophysical Prospecting (Amer. Inst. Min. Met. Eng., New York, 
1932, PP. 332-422.) 
13. G. F. Tagg, “Earth Resistivity Surveying,” Eng. and Min. Jour., Vol. 131, 
No. 7 Ries 13, 1931), Pp. 325-26. 
“Practical Investigations of the Earth Resistivity Method of Geo- 
pheecal Surveying, ” Proc. Phys. Soc. London, Vol. 43, No. 3 (May 1, 1931), pp. 238; 
305-23. - 
15. I. Roman, “How to Compute Tables for Determining Electrical Resistivity 
of Underlying Beds and Their Application to Geophysical Problems,” U. S. Bur. 
Mines Tech. Paper 502 (1931), 44 pp- 
16. G. F. Tagg, “Interpretation of Resistivity Measurements,” Amer. Inst. Min. 
Met. Eng. Tech. Publ. 477 (New York, February, 1932). 
17. T. A. Manhart, “Contributions to the interpretation of resistivity curves,” 
Colorado School of Mines Master's Thesis, April 1932. 
18. L. J. Peters and John Bardeen, “Some of electrical prospecting applied 
in locating oil structure,” Physics, Vol. 3, No. 2 (March, 1932), pp. 103-22. 

I. RESULTS OF RESISTIVITY METHODS 
1. W. Peterson, “Das Aufsuchen von Erz mittels Elektrizitat,” Glickauf, Vol 43, 
No. 29 Gay 20, 1907), PP. 906-10. 
O. H. Gish and W. J. Rooney, ‘‘Measurement of Resistivity of Large Masses 
of Undisturbed Earth,” Terr. Magn. and Atm. Elect., Vol. 30, No. 4 (December, 1925), 
pp. 161-88. 
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