SOME NEW ENGLAND EUCALYPTS AND THEIR ECONOMICS. 28$ 



over, and between 158-170% 50 cc. more, or 75 per cent* 

 below 170° O. These two fractions were again distilled, 

 when 100 cc. distilled below 156*5° and 20 more between 

 that temperature and 159°. 



The portion distilling below 156*5° had specific gravity 

 at 15° C. = 0*8682 ; rotation a B = - 38*9° or specific rota- 

 tion [a] D = - 44*8°; and refractive index at 20° O. = 1*4651* 

 The second fraction had the same specific gravity and 

 refractive index, but the rotation was a little less a D = 



- 36*0°. That it is pinene was shown previously. 



The distillate had after a few days, acquired a turpentine 

 odour agreeing with that of commercial turpentine. It 

 was water- white, and had properties closely approaching 

 those for pure pinene. 



A portion of the crude oil was steam distilled, when 90 

 per cent, readily came over. The slightest tinge of yellow 

 was perceptible in it. It had a turpentine odour, and of 

 course contained the small amount of eucalyptol present* 

 Its specific gravity at 15° O. = 0*8775 ; rotation a D = 



- 33*4°, and refractive index at 19° O. = 1*4659. 



The Uralla sample was partly rectified, only a few drops 

 as usual came over below 155° O. (cor.); between 155 - 164° 

 63 per cent, distilled. This fraction had specific gravity 

 at 15° O. = 0*8699 ; rotation a D = - 38*6°; refractive 

 index at 20° = 1*4641. It had the characteristic odour of 

 turpentine, and was practically identical with similar lower 

 boiling portions of the oil of this species from other 

 localities. 



[Essential Oil (E. dextropinea) — Although this species 

 does not appear to occur in the New England district yet 

 it was thought advisable that a comparative test should be 

 made to again determine the relation of the oil of this 

 species to that of E. laevopinea, and to confirm the results 



