PLATE XXII. 



Fig. 176. 



Acacia (Robinia). Tangential section. 

 The annual rings being cut obliquely 

 appear as loops fringed by the pores. 

 (Nat. size.) 



Fig. 177. 



Oregon Pine. Tangential section. 

 As there are no pores the annual rings 

 appear as loops with clean-cut edges. 

 The narrow streaks crossing them 

 obliquely, are Vertical Kesin-Canals. 

 The minute dots are Horizontal RCMII- 

 Canals. (Nat. size.) 



Fig 178 



Boxwood. Transverse section showin;; 

 minute lozenge-shaped Pith ( x 3 diam.). 



179. 



Lancewixnl 1 1 Hi^uetia), showing peculiar 



defect. The black streak represent* an 



Ebony-like fleck. (Nat. sue.) 



