118 H. G. SMITH. 



odour; specific gravity at 15° = 0*8661; rotation a D = 

 +33°.8; and refractive index at 16° = 1'4697. The indica- 

 tions are, therefore, for pinene similar in physical properties 

 to that distilled from other species of ADgophora, and 

 although the rotation is somewhat less, yet, this is due 

 largely to incomplete rectification, owing to the want of 

 sufficient material. 



Material of this species was also procured from Warialda, 

 New South Wales (460 miles north of Sydney). It was 

 forwarded by the Museum Collector in the month of April. 

 The amount of oil was very small, equalling only 0*005 per 

 cent. As such a small quantity of oil was available nothing 

 further was done with it, but it resembled strongly the oil 

 of this species recorded above. 



As already stated no oil was obtained from either A. 

 cordifolia or subvelutina, and only traces from A. inter- 

 media. 



Summary of Results. 



The general results obtained with the crude oils of the 

 three chief oil bearing species of Angophora are here 

 tabulated for means of ready reference. 



Eotation a D Sp.gr. at 15° Ref. index. S.N. of esters. 



A. Bakeri + 35°-6 0-8719 1-4660 at 22° 336 



A. melanoxylon +24°-9 0-8809 1-4678 at 21° 5 42-5 



A. sp. +36°-3 0-8703 1-4669 at 20° 189 



All these oils are insoluble in 10 volumes 80 per cent, 

 alcohol by weight. The differences are but slight when 

 the increased amount of ester in the oil of A. melanoxylon 

 and the less amount in the oil of the unamed species are 

 considered. 



Little is yet known of the influence which different times 

 of the year may exert on the oils of the Angophoras, 

 although it is not expected that this would influence the 

 results to any great extent. 



