94 



was 49'59, equal to 17-35 per cent, ester as bornyl-and geranyl-acetates. In the 

 cold, with three hours contact, the saponification number was 22-78, equal to 

 7-97 per cent, ester. On redistilling, practically nothing came over below 155° C. ; 

 between 155° and 160,° 35 per cent, distilled ; between 160° and 165,° 17 per cent. ; 

 between 165° and 200°, 20 per cent; between 200° and 250°, 12 per cent. The 

 somewhat large percentage of the oil boiling above 250° indicated the presence of 

 a sesquiterpene or allied body, but it was not isolated. 



The specific gravity of the first fraction at 15° C. =0-8613; oi the second, 

 o-S6i6; of the third, 0-8651; of the fourth, 0-907. The rotation of the first 

 fraction ci, =+12-2°; of the second, +12-7°; of the third, + 14-15°. With 

 the fourth fraction the light did not pass well, but it was more highly dextro- 

 rotatorv than the third fraction, thus indicating the presence of the dextro-rotatory 

 born\I-acetate, common to these oils. The saponification number for the esters 

 of the fourth fraction was 206-33, equal to 72-2 per cent, of ester. In the separated 

 alcohols both borneol and geraniol were determined. The high percentage of 

 ester in this fraction did not leave much room for the sesquiterpene or similar 

 bodies. 



The Oil from the Fruits. 



This material consisted of fruits alone, all the leaves having previously 

 been removed; 43 lb. of fruits gave 2-| oz. of oil, equal to 0-363 per cent. The 

 crude oil was dark coloured and had an odour resembling the Callitris oils generally. 

 The colour was readily removed with dilute aqueous soda, when it was almost 

 colourless, being slightly tinged yellow. By determining the ester both before and 

 after this treatment, it was found that the free acid had a saponification number 

 of 2-6. 



The specific gravity of the crude oil at if ° C. = 0-877; rotation, 

 n„ = — 17-9°; refractive index at 18° C, = 1-4774. The saponification number 

 after the remo\-al of the free acid, was 16-8, equal to 5-88 per cent, of ester. 



By tabulating the results, the differences between the oil from the leaves 

 and that from the fruit are more easily seen : — 



Locality and Specific gravity. 

 Date. °C. 



Rotation «j^ 



Refractive Index. 

 'C. 



Estei, 

 per cent. 



Yield, 

 per cent. 



Crude Oil from the Leaves of Callitris rohusta of Western Australia. 



Western Australia 

 15/7/03 



08825 

 @ 15 



+ 10-3 



1-4752 ; 17-J5 

 (® 19 



0-261 



Crude Oil from the Fruits of Callitris robusta. 



1 1 



Do 0-877 —17-9 1-4774 



% 16 



1 



5-88 



0-363 



