202 H. G. SMITH. 



From the above results it was apparent that the two samples 

 might be considered identical oils, only varying to the same 

 extent as is usually found with oils of the same species of 

 Eucalyptus, at the same time of the year ; the further investiga- 

 tion was, therefore, continued on the oil from the Barber's Creek 

 sample alone. On again rectifying the first fraction of the oil 

 from Barber's Creek (that portion boiling between 156° - 162° C.) 

 the following results were obtained : — 



28 per cent, distilled between 156° - 157° 0. = first fraction 

 30 „ ,, „ 157° - 158° C. = second fraction 



23 „ „ „ 158° - 160° C. = third fraction 



Remainder not distilled. 



Specific gravity, first fraction at 18° C. = 0-8632 

 „ second „ ,, = 0-8644 



third „ „ = 08660 



rotation, first fraction, = + 40*43° 

 „ second „ = +40-08° 



third „ = +39-03° 



The third and final rectification, taking the fraction 156° — 

 158° C, gave 50 per cent, of an oil boiling between 156° - 157° C. 

 This gave results as follows : — 



Specific gravity at f° C. = 0-8750 

 «• C. = 0-8629 

 Specific rotation, using the specific gravity obtained at 18° C. = 

 + 41-2° 



The boiling point of this dextrorotatory pinene may be stated 

 at 156° C. and to have a specific rotation for sodium light +41-2°. 



A sample of commercial dextrorotatory oil of turpentine con- 

 taining the pinene Australene was rectified in the same apparatus 

 and under exactly similar conditions, and using the same correction; 

 35 per cent, distilled between 156° - 157° O. This fraction had 

 a specific gravity at 20° C. = 0*8624 and a specific rotation + 13*8°. 



The Icevorotatory pinene. 

 The leaves and branchlets of Eucalyptus Icevopinea, collected by 

 my colleague, Mr. R. T. Baker, at Rylstone in Aug. 1898, distilled 



