424 PHYSIOLOGICAL FACTORS IN MAMMALS 



of the ionization process (21), and tissue oxygen depletion at the time 

 of irradiation has been shown to increase radiation tolerance (22). 

 Other physiological conditions that qualify the response to radiation 

 will probably be found as our research on the problem continues. 



REFERENCES 



1. Prosser, C. Ladd (with contributions by others), Radiology, 49:299-313, 1947. 



2. Borak, J., Radiology, 38: 481-492, 1942. 



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4. Dobson, Ernest L., The behavior of intravenously injected particulate material, 

 Ph.D. thesis, University of California, 1950. (This is also in press as an Acta 

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5. Allen, J. C, and L. O. Jacobson, Science, 105: 388, 1947. 



6. Rosenthal, Robert L., Science, 110: 43-44, 1949. 



7. Van Dyke, D. C, and R. L. Huff, Am. J. Physiol, 165: April 1951. 



8. Jacobson, L. O., and E. K. Marks, Radiology, 49: 286, 1947. 



9. Hennesy, T. G., and R. L. Huff, Proc. Soc. Exptl. Biol. Med., 73: 436, 1950. 



10. Hevesy, G., Revs. Modern Phys., 17: 102, 1945. 



11. Kelly, Lola, and H. B. Jones, Proc. Soc. Exptl. Biol. Med., 74: 493, 1950. 



12. Gofman, J. W., Conference on blood and blood derivatives, American Red Cross, 

 January 1949. 



13. Jones, H. B., Medical Physics, Vol. II, chapter on nitrogen elimination, p. 855, 

 1950. 



14. Huff, R. L., R. Trautman, and D. C. Van Dyke, Am. J. Physiol., 161: 56, 1950. 



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 1949. 



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17. Kimeldorf, D. J., D. C. Jones, J. L. Lee, T. A. Gonzalez, and M. C. Fishier, 

 Naval Radiolog. Defense Lab. Rept. 241 (NS-082-004), 1949. 



18. Patt, H. M., E. B. Tyree, R. L. Straube, and D. E. Smith, Science, 110: 213, 

 1949. - 



19. Patt, H. M., D. E. Smith, E. B. Tyree, and R. L. Straube, Proc. Soc. Exptl. 

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21. Weiss, Joseph, Conference on certain aspects of the effects of radiation in living 

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 2121, April 1950. 



DISCUSSION 

 Ingram : 



Regarding the occurrence of lymphocytes with bilobed nuclei, I should like 

 to remark that our observations, which were first reported quite some time ago, 

 are somewhat different from those reported by Jones. Our results, based on 



