13. — Mitosis in onion root-lip celts 20" C. Procession index table, and calculation of average absolute duration of the several milotiic stages. 



Average duration of the entire mitotic cycle when the resting 



period is considered a stage. 

 , resting 8tage)= 66.21 per cent of entire duration = 159,57 r 

 10 active 8tage8= 33,78 per cent of entire duration = 81.40e 

 live st3gC3 + R= 100 00 per cent of entire duration = 24 0.97 r 



