PLATE XXIII. 



Radial Sections. Natural Size. 



Fig. 180. 



Maple. Silver-grain in wood in which 



the Rays are of medium size. The 



vertical lines are the Ring- boundaries. 



Fig. 181. 



Kauri. Silver-grain in a Coniferous 

 wood in which the Rays are fine. The 

 vertical lines are the 



Fig. 182. 



Silky Oak (Stenocarpus). Silver-grain 



in wood in which the Rays are extremely 



large. 



Fit- 183. 



Lignum-viM 

 loo olscure to apprai 



lines are 1'of- : brginjMOC IO 



be filled with dark-i oloureti I 

 ingbud is shown protruding from the wood. 



