TIMBER OF DICOTYLEDONOUS TREES 13$ 



To this group belong : — 



Oak. Elm. 



Ash. Spanish Chestnut. 



I. Many medullary rays wide, and visible as light coloured radial bands. 

 Oak (Quercus Robur L.). (Fig. 64.) 



Fig. 64. — Transverse section through 

 annual rings of oak timber, r One annual 

 ring ; s spring-wood ; a autumn-wood ; 

 nt broad medullary ray, (Four times 

 natural size.) 



Fig. 65. — Transverse section 

 through annual rings of ash. (Four 

 times natural size.) 



Fig. 66. — Transverse section Fig. 67. — Transverse section 



through annual rings of elm. through annual rings of Spanish 



(Four times natural size.) chestnut. (Four times natural 



size.) 



2. All medullary rays narrow, and scarcely, or not at all, visible to the 



naked eye. 



(a) Ash {Fraxinus excelsior L.). With a lens the fine vessels in the 



autumn-wood appear few and scattered fairly regularly throughout. 



(Fig. 65.) 



