ABSORPTION OF WATER 



S3 



Fig. 40. — Diagram 

 showing relation of root- 

 hairs to adjacent cells of 

 the root, h, the oldest 

 of the four hairs shown, 

 and furthest from the 

 root-tip. 



Fig. 41. — Root-hairs from the root of a mus- 

 tard seedling, a. In state of turgor; b, be- 

 ginning of plasmolysis after immersion in weak 

 salt-solution; c, later stage of plasmolysis; n, 

 nucleus. 



Fig. 42. — Root-hairs, with soil-particles adhering. (After Sachs.) 



