FLUORESCENCE STUDIES OF NUCLEOPROTEINS 



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Fig. 1. — Microneci-otic foci in the bone-marrow of an irradiated rat (30 niin after irradi- 

 ation, dose 500 r). 



Fig. 2. — Micronecrotic foci in the bone-marrow of an irradiated I'at (3 hr after irradiation, 



dose 500 r). 



