126 M. N. MEISSEL, E. M. BRUMBERG, T. M. KONDRATJEVA AND I. J. BARSKY 



microscopy in the visible region, new facts on the state of celhilar 

 nncleoproteins, and on their early and later changes due to radiation. 

 It has been found that the brightness and spectrum of ultraviolet 

 autotiuorescence of the cells of radiosensitive elements change signifi- 

 cantly after X-ray irradiation. The changes are most liliely connected 

 with alterations in the state of the cellular nncleoproteins. 



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DISCUSSION 



ERRERA: I am interested in this fluorochrominc; of the cells. Were they living 

 cells which were stained? 



