ORANGE-WOOD 



second black layer. Dense and black in trans, sec, with the 

 appearance of leather. 



Uses, etc. Turnery, policemen's batons, pulley- blocks, dead 

 eyas, "26 ft. long by 12 in. diameter" (100). Seldom so large, 

 usually small logs or sticks a few inches in diam. only. Splits 

 with great difficulty : very strong. 



Authorities. Sargent (100). No. 20. Wiesner (131), L. 12, 

 p. 950. 



Anatomical CharaHers. As G. officinale with slight variations. 



Colour. Dark-brown heart-wood sharply defined from the 

 yellow sap-wood, which is from 1-1J inches wide. 



Anatomical Characters. Transverse section : — 



Pores. Just visible, medium, size 3, variable, a few smaller in 

 the later wood of the ring : scarce except in the pore-zone, 16-43 

 per sq. mm. : single or in groups of 2 or 3 pores : scattered : 

 green in all rings except the few outermost in the Sap-wood : 

 shine after wetting. 



Rays. Need lens, difficult to see, very fine, size 6, uniform : 

 equidistant, a pore-width or less apart : very numerous, about 

 43 per mm. 



Rings. Usually clear on account of the pore-ring or the rather 

 larger and more numerous pores of some zones. 



Soft-tissue. Doubtful : some isolated cells in the neighbour- 

 hood of the pores. 



Pith. Round, about 1 mm. diam., brown, hard. 



Radial Section. Lighter in colour than the transverse section, 

 pores prominent though fine, bluish-green or brown lines the 

 contents of which reflect the light. Rays, scarcely perceptible 

 with lens : excessively fine lines. Rings not traceable (Fig. 183). 



Tangential Section. As the Radial, but the pores are more 

 prominent, as they are exposed in greater numbers, and the rays 

 are quite imperceptible with lens. 



Type specimens from commercial sources. Not authenticated, 

 but checked by the specimens in the Museum No. 1, Kew. 



No. 19. ORANGE-WOOD, Citrus Aurantium. 



Linn. 



Plate II. Fig 15. 



Natural Order. Rutaceae. 



Synonyms. There are seventeen enumerated in the Index 

 Kewensis, none of which are of interest here. 



Sources of Supply. Southern Europe, Asia, America, Africa, 

 and most places with a tropical or sub-tropical climate. 



Alternative Names. Laranjeira doce in Brazil (76). Djeroeh 



21 



