62 OF WOOD IN GENERAL. 



light brown : hard, moderately heavy. Plane, 

 Buttonwood or Sycamore, Pldtanus occidentdlis. 

 ** Only some of the pith-rays broad. 



| Broad rays numerous : rings bending inwards at 

 the rays : reddish-white or light brown : hard. 

 Beech, Fdgus. 



I 1 Broad rays few, light-coloured : rings very sinu- 



ous, bending inwards at the rays : yellowish- 

 white : hard, heavy, tough. Hornbeam, White 

 or Blue Beech, Carpinus. 



III Broad rays few : rings almost circular : reddish- 



white, soft. Hazel, Corylus. 



j j j J Broad rays few: rings bending inwards at the 

 rays : white, becoming brownish-red, with brown 

 pith-flecks, soft. Alder, Alnus. 

 (ii) No broad pith-rays. 



* Pith-rays narrow but quite distinct to the naked 



eye. 

 f Wood hard. 



Pith -rays with a decided satiny lustre. Maples, 



Acer. 

 I Rings perfectly circular. 



U Wood white, hard and heavy : pith-rays 

 straight : Sycamore or Plane. A. 

 Pseudopldtanus. 

 UH Similar ; but with winding pith-rays. 



A. opulifdlmm. 

 + 1 Kings slightly wavy. 



U Wood reddish, very hard, sometimes with 

 curled, bird's-eye or blister figures. 



(a) Sometimes with pith-flecks. Field Maple, A. cam- 



p^stre and Moose-wood, A. pennsylvdnicum. 



(b) Without pith-flecks. Rock or Sugar Maple, A. bar- 



bdtum. 



11 H Wood reddish, but lighter, hard, with 

 very fine but conspicuous pith-rays. 



