NEUTRON' EFFECTS ON ANIMALS 141 



ascribed to observational errors inherent in the method and to possible 

 ambiguity of the exact position of the maximum, as obtained by drawing 

 the best smooth curve through the experimentally determined points, 

 rather than to any established trend resulting from irradiation or treat- 

 ment. 



The results obtained are, therefore, presented in substantiation of the 

 conclusions that neutron irradiation of animals is AAnthout definite effect 

 on the light absorption of the plasma or of the hemoglobin from the blood. 

 They also show, secondarily, that intramuscular injections of yeast adenyhc 

 acid or of a mononucleotide mixture are without effect on the absorption 

 curves of plasma or of hemoglobin from blood. 



SUMMARY 



Light absorption determinations have led to the conclusion that neutron 

 irradiation of animals, ^\ith or without the injections of substances capable 

 of influencing the white blood cell count, is without effect on the absorp- 

 tion spectrum of the plasma or of the hemoglobin of the blood. 



REFERENCES 



(1) a. Lawrence, J. H., and Texxant, R., /. Exptl. Med., 66, 667 (1937). 



b. SxELL, G. D., and Aebersold, P. C, Proc. Natl. Acad. Sci., 23, 374 (1937). 



c. Lawrence, E. O., Radiology, 29, 313 (1937). 



d. Aebersold, P. C, and Lawrence, J. H., "Annual Review of Physiology", 



Stanford University, 4, 25 (1942). 



e. Ross, ]\L H., and Ely, J. O., Chapter 19. 



(2) Krejci, L. E., and Sweeny, L., Chapter 13. 



(3) Sanigar, E. B., Miller, G. L., and Maddox, M. N., Chapter 14. 



(4) Sanigar, E. B., Chapter 15. 



(5) Lewis, J. S., Proc. Roij. Soc. London, 93B, 178 (1921-22). 



(6) a. Stenstrom, W., and Reinhard, M., /. Biol. Chem., 66, 819 (1925). 



b. Coulter, C. B., Stone, F. M., and Kabat, E. A., J. Genl. Physiol., 19, 739 

 (1939). 



(7) Sanigar, E. B., Krejci, L. E., and Kraemer, E. O., Biochem. J., 33, 1 (1939). 



(8) Warren, S., and Dltjlap, C. E., Arch. Path., 34, 562 (1942). 



(9) Enns, T., Terrill, H. M., and Garner, J. :\I., Jr., Chapter 3. 



(10) TwYMAN, F., Spencer, L. J., and Harvey, A., Trans. Optical Soc. London, 33, 



37 (1931-32); Twyman, F., Proc. Phys. Soc. London, 45, 1 (1933). 



(11) McDonald, E., /. Franklin Inst., 221, 103 (1936). 



(12) Allen, A. J., and Franklin, R. G., J. Optical Soc. Am., 29, 453 (1939). 



(13) Reinhard, M. C, /. Genl. Physiol., 11, 1 (1927j. 



