A 



FIG. 146 Diagram of nuclear division. 



A, resting-cell, with cell-substances (zk) centrosphere (csfih) containing two 

 centrosomes, nucleolus (,kk), and chromatin (chr), the last distributed in the 

 nuclear network ; the whole nucleus is surrounded by a nuclear membrane. 

 B, the chromatin united in a coiled thread ; the centrosphere divided into two 

 and giving off rays which unite the halves. C, the nuclear spindle (ksp) formed, 

 the rays more strongly^ developed, the nuclear membrane (k?ri) in process of 

 dissolution, the chromatin thread divided into eight similar chromosomes (chrs) ; 



