CATALOGUE OF THE TIMBERS OF THE WORLD 313 



Factory with quite satisfactory results, but it is doubtful if sufficient 

 supplies in the necessary lengths and sizes of straight-grained timber 

 free from knots could be obtained to make its use practicable. 



The numerous pores are exceedingly small. The medullary rays 

 cannot be distinguished with the magnif5dng lens (12 x ). 



Willow, Japanese. Salix Urbaniana, Von Seeman. Japan. 



The Japanese name of this wood is Tokachiyanigi. It is obtainable 

 in logs ranging from 12 to 20 inches in diameter, averaging about 15 

 inches. The wood is reddish-yellow in colour, with a white to straw- 

 coloured sap-wood ; it is closer and finer in texture and grain than the 

 Enghsh wiUow. It takes a smooth surface from the tool, and would 

 make a good substitute for the latter for bat-making. It would also be 

 suitable for aircraft construction, possessing as it does the same quaUties 

 as the English wood. It is very similar to this, but the colour is slightly 

 browner, and the annual rings are much closer. 



The concentric layers are well defined, the pores are not very numerous 

 or large, and the medullary rays are obscure. On the tangential section 

 the pores shine with minute particles of gum. 



Yacal. Shorea sp. Weight, 62 lbs. 4 oz. The Philippines. 



A shipment of fine, clean, faultless planks of this timber came to 

 hand shortly before the war, and as its undoubted good quaUties were 

 unknown, it was sold at an exceedingly unremunerative price. The wood 

 is of a Ught yellowish-brown colour, with a firm, hard texture and close 

 grain. It is very durable and reUable under all conditions, and would be 

 much in demand if it were better known. According to Foxworthy, 

 " yacal seems to be supphed by Shorea balangeran, Burck., and other 

 species of Shorea. Some of it is also supplied by Hopea odorata, Roxb., 

 and other species of Hopea. Large quantities . . . are used in the 

 Philippines for railroad ties. Perhaps the largest place of export for 

 the wood is British North Borneo. ... A very excellent, durable wood 

 which is said to be free from insect attacks." 



The pores are of moderate size, generally plugged with gUstening 

 gum, and are disposed in groups forming a pretty pattern. The 

 fine, clear-cut medullary rays, which are parallel, are very numerous, 

 and are joined at wide intervals by a faint light-coloured ring which 

 follows the line of the concentric layers. 



Yang. Dipterocarpus iuberculatus (?). Weight, 42 lbs. 7 oz. Siam. 



The resemblance of this wood to eng is so strong that one will 

 pass for the other. It has been claimed that yang is better than eng, 

 and vice versa. In general, it may be possible that yang is slightly 



