CATALOGUE OF THE TIMBERS OF THE WORLD 103 



Jackwood. Artocarpus integrifolia, Linn, f. Weight, 40 lbs. (Gamble). 

 India. 



The wood is of a brilUant orange or gamboge colour, not unUke that 

 of the ossage-orange (Maclura aurantiaca, Nutt), with a strongly-marked 

 contrary hard and soft grain which requires a very sharp tool to obtain 

 a smooth surface. It is not much used in the United Kingdom, but 

 is largely utilised in India for all decorative and carpenters' work, for 

 turning and inlay, and also for brush backs. It is reported as darkening 

 to a mahogany colour with age and exposure to hght. 



The pores, which are numerous and rather large, are grouped in wavy 

 bands, and are generally filled with a bright, sparkling gum. The medul- 

 lary rays are very bright and well defined, parallel but not regular. On 

 the tangential section they show strongly in numerous straight, light 

 hues at right angles to the longitudinal grain. 



Jamba. Xylia xylocarpa. Gamble gives the weight as varying from 

 57 to 61 lbs. The Indian Peninsula. 



This is the Indian species of Xylia, which until recently was regarded 

 as identical with the Burmese pyinkado (X. dolahriformis, Benth.). 

 Jamba is found in many parts of the Indian peninsula, being commonest 

 on the west coast. The tree does not reach so large a size as Burmese 

 pyinkado, and the timber is superior in quality to that species, but it 

 tends to spUt in seasoning. 



Jarana Preta. Source unknown. Weight, 69 lbs. 7 oz. Brazil. 



This hard, heavy wood is very liable to split ; it has somewhat the 

 grain of greenheart. ' The colour is yeUow-brown, alternating with a salmon 

 shade in light and dark streaks. It takes a very smooth surface from 

 the tool, and its quahties suggest that it would be useful for fishing-rods, 

 walking and lunbreUa sticks. The transverse grain shows Hke a dark- 

 coloured pine {Pinus sylvestris). The wood has a distinctly unpleasant 

 smell. 



The poies are irregular, small, and mostly fiUed with gum or oil. 

 The medullary rays are clear and strongly defined, joined at right angles 

 by very distinct and fine, similarly coloured lines making a kind of honey- 

 comb pattern. 



Jarrah. Eucalyptus marginata, Sm. Weight, 57 lbs. Western 

 AustraUa, New Zealand. 



The wood is of a bright brick-red colour and of close texture, with 

 interwoven grain occasionally figured hke mahogany. In general 

 appearance it very much resembles karri, and great difficulty has been 

 experienced in distinguishing between them. A simple means of achieving 



