266 



GROWTH OF PLANTS 



Figure 101. a, Portions of fibers from the residues after treatment for 

 23^ hours with HCl. The fibril and particle structure of the membranes 

 are shown as well as the cross-sectional rupturing of the fiber (350 X) 



'•n? u^'r-wo^^'''''! '^^^''^^ ''^ ^^^^ dissociation after 18 hours' treatment 

 with HCl (350 X). c, Extreme degree of fiber dissociation after 5 days' 

 treatment with HCl (350 X). 



