RADIOACTIVITY METHODS 1015 



The application of radioactivity measurements in the mining, exploration, 

 and prospecting for uranium ores is obvious. The radioactivity of these 

 ores is their principal distinguishing characteristic and serves in all phases 

 of their handling, from first discovery, through exploration and drilling, 

 mining, assaying, milling, and ultimate refining. The use of radioactivity 

 methods in other fields is growing at an increasing rate. 



REFERENCES FOR GENERAL READING 



W. C. Elmore, "Electronics for the Nuclear Physicist," Nucleonics 2: No. 2, 4-17; No. 3, 16-36; 

 No. 4, 43-55; No. 5, 50-58 (Feb.-May, 1948). 



W. C. Elmore, "Electronics — Experimental Techniques," McGraw-Hill, New York (in press). 



R. D. Evans, "Fundamentals of Radioactivity and its Instrumentation," Advances in Biology 

 and Medical Physics, I, 151-221, Academic Press, Inc., New York, 1948. 



R. D. Evans, "Fundamentals of Nuclear Physics," Sci. and Eng. of Nuclear Power I, Addison- 

 Wesley, Cambridge (Mass.), 1947, Chapter I. 



S. A. Korff, "Electron and Nuclear Counters," D. Van Nostrand, New York, 1946. 



R. E. Lapp and H. L. Andrews, "Nuclear Radiation Physics," Prentice-Hall, New York, 1948. 



Nuclear Instrument Handbook, Nucleonics 4, No. 5, 97-152 (May, 1949). 



B. Rossi and H. H. Staub, "Ionization Counters and Chambers," McGraw-Hill, New York 

 (in press). 



H. D. Smyth, "Atomic Energy for Military Purposes," Princeton Univ. Press, 1945. 



RADIOACTIVITY METHODS 

 UNITED STATES PATENTS 



2,277,756 Issued March 31, 1942. D. G. C. Hare. "Method and Apparatus for Meas- 

 uring Thickness." 



2,304,910 Issued Dec. 15, 1942. D. G. C. Hare. "Determination of Specific Gravity 

 of Fluids." 



2.315.819 Issued April 6, 1943. C. H. Schlesman. "Method of Exploring Operating 

 Structures." 



2,316,239 Issued April 13, 1943. D. G. C. Hare. "Method and Apparatus for Deter- 

 mining Density of Fluids." 



2,323,128 Issued June 29, 1943. D. G. C. Hare. "Method and Apparatus for Deter- 

 mining Liquid Level." 



2,346,043 K. J. Mysels. 



2,346,486 D. G. C. Hare. 



2,348,810 D. G. C. Hare. 



2,349,429 G. Herzog and J. H. Stein. 



2,365,553 Issued Dec. 19, 1944. J. E. Hill. "Method of Analysis with Radioactive 

 Material." 



2.383.820 Issued Aug. 28, 1945. S. Rosenblum. "Apparatus and Method of Utilizing 

 Ionizing Radiations." 



2,394,703 Issued Feb. 12, 1946. E. Lipson. "Soil Analysis by Radiant Energy." 

 2,397,071-2,397,072 Issued March 19, 1946. D. G. C. Hare. "Radiation Detector." 

 2,397,073-2,397,075 Issued March 19, 1946. D. G. C. Hare and G. Herzog. "Radiation 



Detector." 

 2,397,661 Issued April 2, 1946. D. G. C. Hare. "Radiation Detector." 



2.398.934 Issued April 23, 1946. D. G. C. Hare. "Radiation Detector." 



2,401,723 Issued June 11, 1946. J. H. Deming. "Method and Apparatus for Locating 



Objects." 

 2,405,572 Issued Aug. 13, 1946. H. Friedman. "Radiographic Exposure Meter." 

 2,408,230 Issued Sept. 24, 1946. W. E. Shoupp. "Measuring Apparatus." 

 2,409,498 Issued Oct. 15, 1946. A. S. Keston. "Geiger-Miiller Counter." 

 2,412,174 Issued Dec. 3, 1946. R. G. Rhoades. "Radiographic Inspection Method." 

 2,413,788 Issued Jan. 7, 1947. W. E. Sargeant and H. B. Hoeper. "Amplifier for 



Small Voltages." 

 2,425,533 Issued Aug. 12, 1947. G. Herzog. "Device for Measuring Wall 1 hickness." 



2.437.935 Issued March 16, 1948. E. M. Brunner and E. _S.^ Mardock. "Radiological 

 Measurement of the Permeability of Porous Media." 



