284 R. T. BAKER AND HENRY G. SMITH. 



published in the "Research on the Eucalypts," pp. 38 and 

 241. Material was procured from Tallong in this State, 

 and distilled 25/10/1911. At this time of year the yield of 

 oil exceeded 1 per cent, from terminal branchlets, collected 

 as would be clone for commercial purposes. The pinene 

 was just as pronounced as previously, was highly dextro- 

 rotatory, and on rectification produced an excellent turpen- 

 tine. The saponification number of the ester + free acid 

 = 22*1 when boiled, (almost identical with that obtained 

 previously), and S.N. 10*55 in the cold with two hours con- 

 tact. Thus nearly half the ester appears to be geranyl- 

 acetate, as the presence of acetic acid was determined and 

 geranyl-acetate is readily saponified in the cold with alco- 

 holic potash. The percentage of geranyl-acetate in the 

 crude oil was thus equal to 3*7 per cent. From a commercial 

 standpoint this may be of some importance, as it might 

 eventually be possible to extract the perfumery alcohol 

 geraniol, from this residue, or perhaps the ester itself might 

 be separated, which is even more valuable. The saponifi- 

 cation number in the residue of the crude oil by boiling, 

 after steam distilling, was 77*4, and in the cold, with two 

 hours' contact, it was 31*9, or equal to 11*17 per cent, of 

 ester calculated as geranyl-acetate. The following results 

 were obtained with the crude oil: — 



Yield of oil per cent. ... ... ... = 1*02 



Specific gravity at 15° C = 0*8831 



Rotation a = + 24*2° 



Refractive index at 21° C = 1*4688 



Saponification number of ester + free'acid — 22*1. 

 Insoluble in 9 volumes 80 per cent, alcohol, but soluble 

 in 10 volumes. 



On rectifying 200 cc, using a rod and disc still head, 

 between 155 — 158° 0., 112 cc. came over, and 48 cc. 

 between 158 — 168° C. (all temperatures corrected). These 



