AND THEIR ESSENTIAL OILS. 27 



considerable amount of eucalypbol : pinene was present in 

 rather a large amount for a rich eucalyptol oil, and phel- 

 landrene was quite absent. Volatile aldehydes were pro- 

 nounced, and these had an objectionable odour, which is 

 usual with this group of Eucalyptus 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 pharmaceutical purposes, although the 

 piiiene 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 specific gravity at 15 C. == G'9119; 

 rotation a D : + 8'90; refractive 'index at 15 = 1'4651, 

 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 gave the following results : 



Sp. gr. at Ref. Index 



15 C. Cation a^ &t J50 



First fraction 0-8988 ... + 13 '5 ... 1-4619 



Second traction.... O9118 ... +8-6 ... 1-4631 



Third traction .... 0-9256 ... -f 5 -2 ... 1-4868 



The eucalyptol was determined 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. 



(" 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 Tasmaniaii specimens of Stuart. 



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

 201), synonymises it with E. coria-cea, A. Cunningham, 

 under which species Mueller also places it in his " Euca- 

 lyptographia " (1879). 



Rem.firk8.I.\\ all probability Mueller had not seen speci- 

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



