AND THEIR ESSENTIAL OILS. 165 



considerable amount of eucalyptol ; pinene was present in 

 rather a large ainount for a ricli eucalyptol oil, and ])hel- 

 landrene was quite absent. Volatile aldehydes were )iro-, 

 noiinced, and these had an objectionable odour, which is 

 usual witl] this group of Eucalyj)tus oils. The odour of 

 the rectified oil was that given by the members of this 

 class of eucalyptol-pinene oils generally. It is a very fair 

 commercial oil for pharma('eutical purposes, although the 

 pinene is a little too pronounced. For this reason the 

 specific gravity borders on the minimum allowed, and the 

 dextro-rotation is a little too high. 



The crude oil had s{)ecific gravity at 15° C. = 09119; 

 rotation a^ - -890^; refractive index at 15° = r4651, 

 and was soluble in 2 volumes 70 per cent, alcohol. The 

 saponification number of the esters and free acid was 10. 3. 

 On rectification, a few drops of acid water and volatile alde- 

 hydes came over below 167° C. (corr.). Between 167-173° 

 18 per cent, distilled; between 173-194° 72 per cent, dis- 

 tilled ; the temperature then quickly rose to 250° with only 

 a few drops, while between 250-268° 4 per cent, distilled. 

 These fractions save the followiii2 results: — 



The eucaly])tol was deterjiiined in the portion distilling 

 below 194° and calculated for the crude oil ; 68 per cent, of 

 that constituent was thus shown to be present. The recti- 

 fied oil of this species is tinged yellow, as is usual with 

 most of the oils of this group. 



EUCALYPTUS PHLEBOPHYLLA, F. v. M. 



r' Cabbage " or " Weeping Gum.") 



Botany. 



Historical. — This tree was described by Miquel in 1856 

 ("Ned. Kruidk. Arch." IV. 140), on behalf of Baron 

 Mueller, from the Tasmanian specimens of Stuart. 



Bentham, in his "Flora Australiensis " (Vol. III., p. 

 201), synonymises it with A', roiiacea, A. Cunningham, 

 under which s{)ecies Mueller also places it in his " Euca- 

 lyptographia " (1879). 



lictnarLx. — In all probability Mueller had not seen speci- 

 mens of Cunningham's E. coriartd when he described this 



