212 R. T. BAKER AND H. G. SMITH. 



aliphatic sesquiterpene alcohol. As with the Rose Bay oil 

 the highest boiling portions gave indications for the pres- 

 ence of a sesquiterpene corresponding to that of the alcohol. 



Gosford Trees (20/9/1899). 



The sample of oil from the Gosford material (a few miles 

 from Terrigal) was identical in odour, colour and appear- 

 ance with those from Terrigal and Rose Bay. It approached 

 more closely in constituents to the Terrigal sample, and 

 this might be expected from the somewhat close proximity 

 of these two localities. This sample of oil had been dis- 

 tilled fourteen years, but beyond a few preliminary tests 

 nothing had been done with it. Although stored for such 

 a long time in the Technological Museum, yet, it apparently 

 had undergone little alteration, and the figures here given 

 are in conformity with those of the other samples which 

 were freshly distilled. It will be seen that this oil differs 

 greatly from that of M. Maideni and does not agree at all 

 with ordinary "cajuput." The terpenes in the lower boil- 

 ing portion were lsevo-rotatory pinene, laevo-rotatory 

 limonene and dipentene. Benzaldehyde was also detected 

 by the odour in the portion first distilling. Cineol was 

 present but only about 5 per cent, in the crude oil ; it was 

 determined by the resorcinol method in the portion distilling 

 below 260°. The crude oil gave the following results: — 



Specific gravity at 15° C. = 0*8976. 



Rotation a v = + 5°. 8. 



Refractive index at 22° = 1*4806. 



Soluble in two volumes 70 per cent, alcohol by weight. 



Saponification number for ester and free acid = 6*5. 



On rectification, 2 per cent, of water, aldehydes, terpenes 

 and cineol, came over below 173° O. Between 173 — 183° 8 

 per cent, distilled ; between 183 - 193° 6 per cent, distilled; 

 the thermometer then rose rapidly to 260° with only 1 

 per cent, more (this 7 per cent, thus forming one fraction). 



