PLATE III. (A) Fibers of DNA (deoxyribonucleic acid) from salmon sperm. 100,000 X- (Courfesy of 

 Cecil E. Hall.) (6) Fibers of DNP (deoxyribonucleoprotein) from calf thymus. 100,000 X- (Cour- 

 tesy of Cecil E. Hall.) 



