MACROSCOPIC STRUCTURE. 33 



Radial Section. The medullary rays gleam out in the 

 bright mass of the wood as numerous narrow parts of bands. 

 The sections of the vessels are dark but lustrous. 



Tangential Section. The lines of interruptions of growth 

 show as bright bands ; the 

 vessels as parts of canals, 

 similar to those in the radial 

 secfcion. The wood is bright 

 in this section also. 



Sapwood narrow, heart- 

 wood bright reddish- brown ; 

 specific gravity like that of 

 walnut. 



19. Sped' 1 * of C<'drda-wood, 

 commonly known as Cedar- 

 irood (Cedreld). 



(Tropical and sub- tropical 

 America, Asia and Aus- 

 tralia.) 



Cedrela-wood or cedarwood 

 is softer and lighter than 

 mahogany, though very ncnr 

 it in structure. The vessels 

 of the spring- wood are some- 

 what larger than those of 

 the summer-wood; the entire pjg 21 _ Teakwood(Tectonagrandi8) . 

 wood is somewhat less 



lustrous, and the tint of the heartwood is of a greyer red than 

 the bright red of mahogany. 



20. Teakwood (Tectona yrandis}. 

 (Tropical Asia.) 



Transverse Section. The commencement of each season's 

 growth is marked by a narrow bright zone of very distinct 

 and usually open pores, which are consequently dark in the 

 plate; the pores are often in groups. Towards the end of 

 each season's growth, and therefore resembling summer-wood, 



F.T;. D 



