178 



UTILIZATON OF EXODKD PRODUCTS. 



the bark here and there. On the flat space thus exposed the gum 

 collects and is scraped off when sufficiently dry. 



Article 3. — CoLLECTioif peom wounds in the wood. 



This is the only mode of collecting the resins of the Diptero- 

 carpete and of pines. The native method of tapping both families 

 of trees is to cut one or more deep niches, according to the size 

 of the tree, .into the stem, at about 4 feet from the ground 

 {Fig. 63). The height of the niche is about 18 inches and the 



Fig. 63. 



SECTION. 



Kiclting Pinas longi folia for resin. 



width at the opening about 1 foot. At the bottom it is hollowed 

 out into the form of a deep bowl (b in Section) to receive the 

 resin that runs down the sides. This hollow is emptied as fast as 

 it fills up ; in the case of Pinus longifolia, once in from 4 to 10 days 

 when the niche is first made, and at longer intervals afterwards 

 when the outflow diminishes. The Dipterocarpese are tapped 

 during the dry hot months preceding the summer rains, Pinus 

 longifolia during February-June, after which the resin, although 

 it continues to flow, does not do so fast enough to tempt the col- 

 lector to extend his work into the rains. In the pine a niche is 

 worked for two and three consecutive seasons, unless a forest fire 

 occurs and chars all the inside.; and the yield is from 3 to 6 lbs. 

 the first year, a little more than half that quantity the second year, 

 and almost as much the third year. From time to time, however, 



