174 



as by [hv lornic'r mclliod. in which we wvw al)li' lo oversee 

 Ihe tolal line of jx'i'iphery ; Ihe Iwo nielhods conlrol one 

 anolher in a xcry salisi'aclory manner. 



The iH'suits ol" these experiments, as i( ran he seen on 

 lahles i;i. 11. If), IC) and 17 and Ihe (hajfj-ams I-"i,«4s M). 'M. 

 ;i8 and 31) are. thai periods of high percentage of cells in 



f 2 3 t 5 ( '' I f ^0 fi 1! 13 iiJ ii 'S rt It 19 to ti 22 t> t* U tl r> U If 30 

 Ze>f ► 



Fig. 3b. 



stages of division are followed hy periods of low pei'cenlage 

 or none The figiu'cs ol)laine(i by this method can of course 

 not be taken too literally on account of the ralhei- I'ough 

 method, but it is interesting lo follow the ui'eat clKinues 



S 9 10 "n n 13 1V 15 16 n IS 19 



Fig. 37. 



from lime lo time. It was always obserxcd. that long 

 |)eriods with, few or no dividing cells are followed b\- 

 periods with many dividing cells. In the fig. 30 it can bo 

 seen very strikingly, that before and after a big rise in 

 the percentage of dividing cells, there is a i-alher long |)e- 

 riod of latency. 



