366 



As a rule. 1 have left out Mueller's terms referring to the closeness of the 

 lateral veins relating to distance between them, such as " not of very close approach " 

 or "not closely approximated"; "not crowded" or "rather remote," "distant," 

 or " close " or " rather close." Mueller frequently uses the word " subtle " to 

 describe the inconspicuous veins in contradistinction to prominent. 



In my " Forest Flora of New South Wales," Part LXVII, is an Appendix 

 entitled " A Tentative Bibliography of Eucalyptus Oil." As the title implies, the 

 chemistry rather than the botany, is touched upon, but the paper may be referred 

 to by my present readers. 



The papers of Messrs. Schimmel & Co., of Leipzig, Germany, from 1887 

 onwards, may be picked out for especial reference, as the firm was much interested in 

 Eucalyptus oil, and took pains to test oils belonging to a fairly large number of species. 



So also should the following: — Wilkinson, W. Percy, "Preliminary Survey 

 of Eucalyptus Oils of Victoria." Proc. Roy. Soc. Vict., vi (New Ser.), 195 (1894). 

 Gives the values of the physical constants of eightj^-seven botanically named 

 Eucalvptus oils. The paper has a useful bibliography, and it is the first scientific 

 investigation of Eucalyptus oils in Australia. 



See also Maiden, J. H., " The Chemistry of the Austraban Indigenous 

 Vegetation," being the Presidential Address in Section B. (Chemistry), Aust. Assoc. 

 for Adv. of Science. See vol. vi, p. 25 (1895). It contains a brief account of my 

 early endeavours to put the investigation of Eucalyptus oils at the Technological 

 Museum on a scientific basis. ' The still is under construction at the Technical 

 College " . . . . (as an exercise in the engineering department of the College, 

 which 1 was able to effect by virtue of my authority as Superintendent). 



F. Naudin, 1891. ; ' From each side of the midrib (Naudin, 2nd Mem. 10) secondary veins 

 start, which is often sufficiently characteristic of certain species. These veins rejoin a marginal vein 

 which makes the circuit of the leaf, whose margin it more or less approaches, and sometimes merge them- 

 selves in it." 



G. Deane, 1900.— " Observations on the Tertiary Flora of Australia, &c," 

 Part II, " On the venation of leaves and its value in the determination of botanical 

 affinities " (Proc. Linn. Soc. N.S.W., xxv, 581, with Plate 36 (Eucalyptus). 



In Plate 36 Mr. Deane gives some illustrations of the leaves of Eucalyptus 

 showing the variable venation. ' It may be a surprise to many to find on what 

 different plans the vein system of the leaves of different species is arranged. . . . 

 The secondary veins afford a great many different varieties. Observe for instance : — 



E. coriacea and E. stellulata with their longitudinal veins, E. Sieberiana and 

 others with secondary veins placed at an acute angle with the midrib. Follow the 

 series down until the secondary veins become almost transverse." (P. 585). 



Mr. Deane and I (Proc. Lvtm. Soc. N.S.W., xxii, 561, 1897) first began to record 

 the angle which the lateral veins make with the midrib, but in many leaves this can 

 only be stated with more or less approximation. The matter is of great importance, 

 and will be dealt with later. 



