38 C. E. VAN ORSTRAND 
35- C. E. Van Orstrand, “On the Flow of Heat from a Rock Stratum in Which 
Heat is Being Generated,” Jour. Washington Acad. Sci., Vol. 22 (December 19, 1932), 
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36. H. Werner, “Geothermics as a Means of Locating Petroleum Deposits,” Petrol. 
Times (London), Vol. 23 (April 10, 1930), pp. 713-14. 
37- John Joly, Surface History of the Earth, Oxford (1930), p. 69. 
38. Robert W. Lawson, “Radioactivity and the Heat of the Earth,” Nature, Vol. 
119, No. 2 (May 14, 1927), p. 704. 
39. Frederick G. Clapp, ‘Role of Geologic Structure in the Accumulation of 
Petroleum,” Structure of Typical American Oil Fields, Vol. 2 (Amer. Assoc. Petrol. Geol., 
1929), pp. 694-95. ‘ . : 
40. N. H. Darton, “The Hot Springs of Thermopolis, Wyoming,” Jour. Geol., 
Vol. 14 (1906), pp. 194-200. 
H. C. Boydell, “Temperature of Formation of an Epi-Thermal Ore Deposit,” 
Inst. Min. Met. Eng. Bull. 331 (April, 1932), pp. 19-43; Discussion, 332 (May, 1932), 
PP- 25-39; 333 (June, 1932), pp. 13-19. 
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