PLATE XXIII. 

 Radial Sections. Natural Size. 



Fig. ISO. 

 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 Ring-boundaries. 



Silky Oak (Stenocarpus). Silver-grain 



in wood in which the Rays are extremely 

 large. 



Fig. 183. 



Lignum-vitce (Guaiacurn). Silver-grain 

 too obscure to appear The very fine dark 

 lines are Pores near the Heart beginning 

 to be filled with dark-coloured gum. A 

 Restingbud is shown protruding from 

 the wood. 



