172 K. T. BAKER AND H. G. SMITH. 



pheaolphthalein and the solution titrated with semi-normal 



sulphuric acid. The weight of potash used in the saponification 



was then calculated, the saponification figure determined, then 



saponification figure x 19-6 „ 



— — = per centage or ester. 



oo 



1. 2-6468 gram required '4312 gram potash 

 S.F. 163 =57-05 per cent, ester. 



2. 1-6502 gram required *2688 gram potash 

 S.F. 163 =57-05 per cent, ester. 



3. 1*8938 gram required -3248 gram potash 

 S.F. 171-5 =60 per cent, ester. 



4. 1-8769 gram required -3248 gram potash 

 S.F. =170-5 = 59-7 per cent, ester. 



5. 1-777 gram required -3108 gram potash 

 S.F. =174 = 60-9 per cent, ester. 



6. 1-7649 gram required '3276 gram potash 

 S.F. =185-6 = 64-9 per cent, ester. 



7. 1-8509 gram required -3444 gram potash 

 S.F. =186 = 65-1 per cent, ester. 



(Nos. 6 and 7 represent the November oil.) 



Determination of the free Alcohol. 



10 cc. of the November oil containing 65 per cent, of geranyl 

 acetate was mixed with an equal volume of acetic anhydride and 

 a little anhydrous sodium acetate ; this was boiled for three hours, 

 water was then added and the whole again heated, the oil was 

 separated, washed and dried. 



1-3558 gram of this oil required -3164 gram potash S.F. = 233*4 

 = 81-68 per cent, ester. We thus obtain 16-68 per cent, increase 

 of ester, which calculated from O 10 H 17 OOCCH 3 represents 13-11 

 per cent, of free alcohol. From the distillation figures this alcohol 

 is probably geraniol. 



Oxidation of the alcohol to aldehyde. 



The fraction 222 - 240° was saponified and the oil distilled ; 

 the fraction 227 - 230° was oxidised by bichromate of potassium, 





