94 DAMMAR AND WOOD OIL. 



The oil soon sets into a stiff light brown resin, leaving very 

 little of the liquid (CKaier). It is used for varnish either when 

 fresh before it has time to set or mixed with other more liquid 

 oils. 



D. Kerrii, King. Minyah Keruing Chaier. The oil is rather 

 thin and watery of a yellow colour, and the resin is yellowish 

 white. 



D. Hasselti Bl. Minyah Keruing Sudi. The oil is of a 

 deep brown colour, red by transmitted light with a rather stiff 

 brown resin deposit. One of the best oil trees ; it is not rare 

 to find fruits of this in which the pericarp contains nothing but 

 a clear transparent oil. 



D. crinitus, Dyer. Minyah Keruing Bulu. This oil is con- 

 sidered a good kind and used for mixing with the thicker oils. 

 The tree is commonly known as Gombang. 



Minyah Pehat, Minyah Merah and Minyah Babi are as yet 

 unidentified. 



D. incanus Roxb. and D. alatus Roxb. occur in Siam and 

 supply the greater part of the Siamese Wood Oils of commerce. 

 They will probably be found in the north of the peninusula as 

 they are found quite in the south of Siam. Siamese wood oil 

 (probably from D. alatus) is very dark in colour nearly black by 

 reflected light but yellow by transmitted light ; the resin whitish. 

 The greater part of the Wood Oils of Commerce are now export- 

 ed from Rangoon, and are derived from the forests of Burmah. 

 The trees producing them are all species of Dipterocarpus but 

 all or nearly all distinct from those of the Malay Peninsula. 

 A full account of them is to be found in Watt's Dictionary of 

 the Economic Plants of India. 



