28 



The crude oil had specific gravity at 15 C. -= 0-8756 ; rotation a D + 22-9; 

 refractive index at 20 1-4731, and was insoluble in 10 volumes 80 per cent, 

 alcohol. The saponification number for the esters and free acid was 10-5. 

 On rectification the following four fractions were obtained : 

 Between 159-162 C., 37 percent, distilled; between 162-172, 32 per 

 cent, came over ; between 172-245, 13 per cent, distilled, and between 245- 

 264, 10 per cent, distilled. 



These fractions gave the following results : 



First fraction, sp. gr. at 15 C. -- 0-8619 ; rotation + 33-4. 

 Second ,, ,, ,, = 0-8616 ; ,, + 29-4. 



Third = 0-8650; + 15-8. 



Fourth ,, ,, ,, = 0-9254; light did not pass well. 



In a paper read by us before the Royal Society of New South Wales, 

 October, 1901, " On the Relation between Leaf Venation and the Presence of 

 Certain Chemical Constituents in the Oils of the Eucalypts," the following 

 appears, page 117 : 



' We are not aware that the oil has yet been distilled from the leaves 

 of E. calophylla, but from the chemical evidence and the botanical 

 characteristics of leaf venation, it is very probable that when distilled, 

 pinene will be found to be an important constituent of the oil, and that 

 phellandrene will be absent." 



This was in relation to a species growing 3,000 miles away. 

 The results of this investigation bear out the correctness of that 

 surmise, which was, of course, based upon the facts obtained during the 

 investigation, for the first edition, of a very large number of species of 

 Eucalyptus. From the numerous confirmatory results obtained since that 

 paper was written (and later with the kinos) it appears that there is a very 

 close relationship, not only between the botanical characters, but also the 

 chemical constituents of the various species of Eucalyptus, belonging to this 

 group. 



2. Eucalyptus diversicolor. 



(F.v.M., in Frag, iii, 131, 1863.) 

 Karri. 



Systematic. This tree is the largest in Australia, even attaining a height 

 of 400 feet, and thus exceeding any other Eucalyptus on the Continent. The 

 bark may be described as persistent, whitish, or in older trees blackish and 

 decorticating in long strips. *Abnormal leaves are ovate or oval in shape, the 

 normal ones being lanceolate, acuminate, falcate ; both kinds having a pale 

 nnder-surface. The veins are very numerous, not pronounced, but spreading 



> 



* It has beer, customary in the past to speak and write of these particular leaves as " Sucker " loaves, but 

 as Eucalyptus trees do not "sucker" in the way defined in botanical works that is, send forth shoots from the 

 roots varyiiii- in distances from the stem the term is discarded in this work, and the word abnormal used 

 instead as it MVIIIS to more appropriately evprest nature's work in this direction, for science is not advanced by- 

 perpetuating such nn apparent misnomer as "Sucker" leaves. 



