SUPPORTING TISSUES 



107 



popp aa pagan gaaaj 

 Ipnoaa o □ o a ~~a 



an nanoauuacL 



Plate 41. — Fibers. 



1. Cinchona bark. (Porous, striated.) 2. Tonga root. (Branched, nonporous, 

 nonstriated.) 3. Nettle root. (Porous, nonstriated.) 4. Cascara Sagrada bark. 

 (Crystal-bearing.) 



