PLATE II. 



R'. 



•irmr*W 









I ii-'i 



iSH* 



.' ', f. I 1 f I' t H s 





'■('■ 



1,;^ 



'J J' 



.1] 



I '.I 



I ( '» 





ii «' 



' 1 1 ', f 

 '1'!; 





Oak wood, showing- the difference in appearance of the various sections. 



Nat. size. 

 A. Transverse section (a cross gi'ain, b. Vertical radial section (quar- 



horizontally as the tree stands). tered, showing silver grain), 



c. Vertical tangential section d. Vertical section in a direction 



(plankwise). between b and c. 



Photo-micrographs by A. Deane. 



Adlard 4' Soti, Impr. 



