Sec. 12.4] IONIZATION CHAMBERS 357 



minations of the measured radiation plus background to obtain the total 

 standard deviation from the mean or, where, as before, 



ot = (<tb + gr)^- mv/sec 



REFERENCES FOR CHAP. 12 



1. Strong, J.: "Procedures in Experimental Physics," Prentice-Hall, Inc., New York, 

 1946. 



2. Hoffman, G.-.Phys. Z., 13, 480, 1029 (1922). 



3. Lindemann, F. A., A. F. Lindemann, T. C. Korley: Phil. Mag., 47, 477 (1924). 



4. Lafferty, J. M., K. H. Kingdon: /. Applied Phys., 17, 894 (1946). 



5. Nier, A. O.: Rev. Sci. Instruments, 18, 398 (1947). 



6. Scherbatskov, S. A., T. H. Gilmartin, G. Swift: Rev. Sci. Instruments, 18, 415 (1947). 



7. Parsegean, V. L.: Rev. Sci. Instruments, 17, 39 (1946). 



8. Gray, L. H: Proc. Roy. Soc. (London), A122, 647 (1929). 



9. Gray, L. B..: Proc. Cambridge Phil. Soc, 40, 72 (1944). 



10. Loevtnger, R. : Private communication. 



11. Failla, G. : College of Physicians and Surgeons, Columbia University, New York. 



12. Palevsky, H, R. K. Swank, and R. Grenchik: Rev. Sci. Instruments, 18, 298 (1947). 



13. Gray.L. n.:Proc. Roy. Soc. {London), A156, 578 (1936). 



