BY FRANK SMITH, B.SC, F.I.C. t)l 



Determination of its constants was made with tlie 

 following results : — 



26°C. 



Sp. gr. at .932 



26°C. 



Acid Value 18.0 



Hehner No (Insol. acids and uiisapouitiable 



matter) ,. .. .. .. .. .. 95.2 



Unsaponifiable flatter . . . . . . . . 8.0 pei cent. 



,Sai)on. Value 180. 



Iodine Value 108.0 



Reichert-ilei.ssl Value .. .. .. .. 2.5 



The Bitter Prikciple, Resin Acid, and Unsaponifiable 



Matter. 



The bitter i)rinciple present in the oil is soluble in 

 water and alcohol and is removable by washing with these 

 solvents. It is non-alkaloidal. 



Saponification of the oil with alcohohc potash showed 

 an amount of insoluble deposit Avhich proved to be the potash 

 salt of a resin acid. Solution in water and acidification 

 gave a brown resinovis material, taken to be a resin-acid 

 anhydride. 



The resin acid jnesent is dissolvable in alcohol and 

 was obtained as a white non crystalline resinous substance 

 insoluble in petroleum spirit. It amounted to 4.0 per 

 oent on the weight of the oil. 



The unsaponifiable matter is a brown resinous oil. 



The Insoluble Fatty Acids* were principally 

 liquid and had the following constants : — 



Neutralisation Value, 200.6, equivalent to Mean 



Molecular Weight, 279.5. 

 Iodine Value, 110.0. 



Separated into their components, after removal of 

 resin acid as potash salt insoluble in excess of alcoholic 

 potash, there was obtained : liquid acids, 87 per cent ; 

 solid acids, 13 per cent. 



The Liquid Fatty Acids. Iodine value. 119.0. 



Containing 4 per cent, of resin aci<l. 



