6. — Procession index table. {Preliminary study.) 



Calculatin g the Absolute Duration of the Mitotic Cycle. 



= The movement of a recognizable Procession Index 'through 5 stages of equal duration in 100 minutes 



= The movement of a recognizable Procession Index through 6 stages of equal duration in 90 minutes 



= The movement of a recognizable Procession Index through 3 stages of equal duration in 50 minutes 



htocessbn Index 



Time 



Average Time 

 per Stage 



5 stages 100 min. 



6 " 90 " 15 

 3 " 50 " 16.66 " 



Giving equal weight to each procession 3 )51.66 min . 

 Average Duration of 1 step, i. e., ■'fo the 



cycle = n.22 " 



'.'The Average Duration of the entire 



active mitotic cycle = 172.2 



The Average Duration of the resting 



stage =33&06 " 



The Average Duration of the entire 



cycle including the resting stage = 508.26 



20 min Average Absolute Duration of/. . p, rp^^ 

 the Entire Active Mitotic Cycle ^^'^- '^•° ^' 



Time elapsing between 2 



, points in a recognizable 



S procession.ofa defini te P. I. 



No. of stages covered 



No. P. I. followed 



Naof 

 X stages 

 \n cycle 



Average Absolute Duration of..,-, rc\ «Ar-. r^ »r^r^ re 

 a given Mitotic Stage ^^- *" °- °^ S.) = A. A. D. of C. x A. R. 0. of S. 



.*. In this onion root-tip experiment the Average Absolute Duration of the succes- 

 sive mitotic stages is as follows: 

 Stage Stage Stage Stage Stage Stage Stage Stage' Stage Stage 



123456789 10 



77.02 38.19 16.05 4.58 1.32 1.65 1.53 4.83 &31 20.59 



min. min. min. min. min. min, min. mia min. min. 



