THE TIMBERS OF COMMERCE 



Authorities. McTurk, No. 57 (78). Holtzapffel (48), p. 106. 

 Miers(76). Boulger (12). Wiesner (131), L. 12, p. 905. Saldanha 

 da Gama (99). 



Colour. Heart-wood nut-brown curiously mottled with black, 

 sharply denned from the brownish-yellow sap-wood which is 

 from 3^-65 inches wide. 



Anatomical Characters. Transverse section : 



Pores. Rather prominent, size 2-3, little variation : sub- 

 divided in groups of from 2-13 pores : not very numerous, from 

 10-17 per sq. mm. : filled with ruby or dark resin or curious thick- 

 walled thyloses (131). 



Rays. Need lens, fine, size 5, uniform : equidistant : numer- 

 ous, from 9-11 per mm. : tapering both ends : denser than the 

 ground-tissue : lightly avoiding the pores : brown. 



Rings. Doubtful : a zone richer or poorer in pores here and 

 there, no definite boundary. 



Soft-tissue. Encircling the pores and extending laterally into 

 wings : width equal to that of the rays. 



Pith. ? 



Radial Section. This is the section which shows the markings 

 from which the popular names are derived. They are supposed 

 to resemble the markings upon the skin of a snake. Pores, incon- 

 spicuous, though large, being lost amongst the black markings : 

 usually filled with dark resin. Rays, fine, brown, narrow flakes : 

 lustrous : abundant at times and obscuring the black zones in 

 patches thus causing the patchy markings already referred to. 

 Rings doubtful but the dark or black pigment zones are very 

 prominent. 



Tangential Section. As the Radial, but the effect caused by 

 the rays is, of course, absent : the latter appear as minute, incon- 

 spicuous lines about 0*5 mm. high. 



Type specimens authenticated by the Forest Officer to the 

 Government of British Guiana. 



No. 179. DEL. Artocarpus nobilis. Thw. 

 PLATE XIII. FIG. 113. 



Natural Order. Urticaceae. 



Synonym. A pubescens. Moon. Cingalese name, Aludel. 



Source of Supply. Ceylon. 



Physical Characters, etc. Recorded dry-weight 39^-50 Ibs. per 

 cu. ft. Hardness Grade 5, compare English Ash. Smell and 

 taste none. Burns well and quietly : embers glow in still air : 

 much ash. Solution with water yellowish-green. 



Grain. Moderatelv fine, open and even. Surface of the ground 

 has a beautiful metallic lustre. 



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