CELL-DIVISION 51 



twenty-four hours or more, and from the tissue thus hardened 

 cut longitudinal sections so as to traverse the pith. Stain with 

 hnematoxylin, wash with alcohol, transfer to oil of cloves, and 

 mount in Canada balsam. In sections so prepared, if the 

 staining is not too deep, cells may be found in various stages 

 of division, showing the peculiar nuclear spindle, or the deli- 

 cate new cell-wall between the freshly formed nuclei. For 

 details of the process of cell-division, see the larger edition, p. 84. 



