OLEOKESIN OF PINUS INSULARIS ENDL. 



231 



No evidence of a crystalline substance other than abietic acid was found. 

 Twelve grams of the crude substance were dissolved in 30 cubic centimeters of 

 dry ether and dry ammonia passed in until the solution was saturated with the 

 gas. Nothing separated from the solution. 



The mucilagenous material left in the mother liquors after crystallizing the 

 crude abietic acid was not investigated. 



The Koettstorfer number of a "water white" sample of the colophony was 

 170.2. The Liebermann-Storch reaction gave a brilliant purple the same as in the 

 case of American colophony. 



The above data are sufficient to show that the turpentine and colophony 

 from Pinus insularis Endl. are practically identical with those produced in 

 America 



