ti8 



305° 



The crude oil had specific gravity at 15 C. = o - 9ii3; rotation a D + 



refractive index at 20° — 14649, and was soluble in i : [ volumes 70 per 

 cent, alcohol. The saponification number for the esters and free acid was 24. 



On rectification 2 percent, distilled below 168 C. (corr.). This. portion 

 consisted largely of the two aldehydes, butaldehyde and valer aldehyde. Between 

 168-188 . 89 per cent, distilled. The distillation was not carried further. 



This fraction had sp. gr. at 15° C. = 09094; rotation a D + y2°. 



PLATE XXVII 



.1/. F. Connelly, Photo. 



EUCALYPTUS CINEREA. 

 "ARGYLE APPLE.' 



F v.M 



This photograph shows the foliaceous character of this species. 

 Towrang, N.S.W. 



The cineol, determined by the phosphoric acid method in the rectified 

 portion, was 59 per cent. (O.M.), indicating about 54 per cent, in the crude oil. 



The rectified oil was yellow in tint, as is usual with the oils of this class. 

 This colour is traceable to the influence of the phenol australol. 



Leaves and branchlets of this species for distillation were also obtained 

 fiom the following localities : — Barber's Creek, New South Wales, in September, 

 1899; Towrang, in August, 1900; Barber's Creek, in November, 1896; Barber's 

 Creek, in September, 1897. The oils from all this material were found to be 

 fairly constant in general characters ; and the percentages of esters, cineol 

 content, optical rotations, and yields of oil were all practically in agreement, 

 only varying in the amounts usual with the oil of a particular species, distilled at 

 varying times of the year. 



