146 H. G. SMITH. 



282° C. was 0*9511. The high specific gravity of this portion of 

 the oil raises the specific gravity of the crude oil above that of 

 Darwinia fascicularis. The specific gravity of the oil after 

 saponifying was 0*9115 at 15° C. 



Determination of the ester. 

 The amount of ester present was determined by heating the oil 

 on the water-bath for one half hour (using upright condenser) with 

 20 cc. of semi-normal alcoholic potash, and then titrating with 

 semi-normal sulphuric acid in the usual way. 



(1) 2-9725 grammes oil required '5124 gramme potash; saponi- 



fication figure = 172-38. 



(2) 3-0125 grammes oil required -5194 gramme potash; saponi- 



fication figure =172-4. 



As the ester consists entirely of geranyl acetate with a molecular 

 weight of 196, the amount of ester present in the crude oil is 

 60-34 per cent. 



After removing the free acid in the oil an ester determination 

 gave the following result : — 



1-945 grammes oil required -3332 gramme potash; saponification 



figure =171-3. 



this gives the saponification figure for the free acid as 1-1, so that 



the amount of ester as geranyl acetate in the oil was 59-95 per 



cent, and the free acid represented an ester value of 0*39 per cent. 



Determination of ester by cold saponification. 

 The oil taken was that from which the free acid had been 

 removed by aqueous potash, one and a half hours elapsed after 

 addition of the alcoholic potash before titration. 



1-65 grammes oil required -2828 gramme potash; saponification 

 figure =171-4 

 this is equal to 59 - 99 per cent, and it shows that the whole of the 

 ester present in the oil is saponified in the cold in one and half 

 hours. 



It appears thus certain that the ester present in this oil is 

 wholly geranyl acetate and that the other esters present in 



