SOME NEW ENGLAND EUCALYPTS AND THEIR ECONOMICS. 



287 





Black Mtn. 



Uralla. 



Armidale. 



Tenterfield. 





6/8/07. 



11/7/07. 



24/6/07. 



12/1/10. 



Yield of oil per cent. 



0-45 



0-574 



0-436 



576 



Specific gravity at 15° C 



0-9249 



0-9245 



09221 



0-9301 



Rotation a D ... 



= +4'3° 



+ 4-7° 



+ 5-8° 



+ 0-9° 



Refractive index ... 



1-4857 at 



1-4944 at 



1-4892 at 



1-4932 at 





18° C. 



15° C. 



15° C. 



20° 



Solubility in 10 vols. 80% 











alcohol 



insoluble 



ditto 



ditto 



ditto 



Phellandrene 



traces 



ditto 



ditto 



none 



Eucalyptol ... 



traces 



ditto 



presence 

 well mrkd. 



traces 



Distilling above 245° C. ... 





70% 



55% 



76% 



S.N. of ester + free acid ... 





6-4 



5-7 



6-9 



The Tenterfield sample gave, on rectification, the follow- 

 ing results: — Less than one per cent distilled below 159° C. 

 although a fair quantity of pinene was present, this was 

 due to the large amount of high boiling constituents present. 

 Between 159 — 170° C, 10 per cent, distilled ; between 170 

 — 245° 9 per cent., and betweeu 245 - 273° 76 per cent. The 

 rotations a D of the several fractions were — first 4- 30*3°; 

 second + 22*4°; third - 2*1°. The light passed with the 

 third fraction fairly well when diluted with an equal portion 

 of chloroform. The specific gravity of the first fraction at 

 15° C. = 0*8652 ; of the second = 0*8713 ; and of the third 

 = 0*9326. The refractive index of the first fraction at 

 19° C. = 1*4679; of the second = 1*4724; and of the third 

 = 1*4989. The first and second fractions were mixed and 

 again distilled, when 9 per cent., calculated on the original 

 oil, came over between 156 - 157° C. This fraction had 

 specific gravity at 15° O. = 0*8631 ; rotation a D + 31*6, or 

 specific rotation [a] D = + 36*61°; refractive index at 18°0. 

 = 1*4677, and was almost pure pinene. 



With the Uralla oil 10 per cent, distilled between 160 — 

 170° 0., which had specific gravity at 15° O. = 0*8638 ; and 

 rotation a D = + 27*7, and refractive index 1*4678. 



With the Armidale sample 10 per cent, distilled between 

 160-170° 0., which had specific gravity at 15° C. =0*8705; 



