133 



ESSENTIAL OIL. Leaves and terminal branchlets for distillation weir 

 procured from Laurel Hill, near Batlow, New South Wales, in May, 1916. 

 The material consisted wholly of the mature lanceolate leaves. The yield of oil 

 was 0-15 per cent. The crude oil was of an amber colour, and had an odour 

 similar to those of the cineol-pinene group generally. Cineol was present in some 

 quantity. The chief terpene was pinene, and phellandrene was absent. A small 

 quantity of the sesquiterpene was detected, but esters were not pronounced. 



The crude oil had specific gravity at 15 C. == 0-9145; rotation a D + 4-6; 

 refractive index at 20 = 1-4645, and was soluble in if volumes 70 per cent, 

 alcohol. The saponification number for the esters and free acid was 8-5. 



On rectification 2 per cent, distilled below 162 C. (corr.). Between 162-172, 

 27 per cent, distilled; between 172-192, 60 per cent, came over, leaving n per 

 cent, as residue. The fractions gave the following results : 



First fraction, sp. gr. at 15 C. = 0-9085 ; rotation a D + 7-2 ; refractive index 



at 20 = 1-4616. 

 Second ,, ,, = 0-9149; rota ion a D + 3-6; refractive index 



at 20 = 1-4630. 



The cineol, determined by the phosphoric acid method in the crude oil, was 

 50 per cent. 



In March, 1899, materal for distillation was received from Bungendore, 

 New South Wales. The trees from which it had been collected bore some 

 resemblance to E. rubida, but as the results did not agree with those ior that 

 species, the data we obtained were omitted in the first edition of this work. 

 Now that the same tree has been located at Laurel Hill, and named, the previous 

 results fall into line, and are here recorded. It is thus seen that E. Dairy mpleana 

 has quite an extensive range. The material consisted largely of abnormal leaves, 

 consequently the yield of oil was larger than with the above, which was distilled 

 from normal leaves, otherwise the oil was quite in agreement with it in all 

 respects. 



The yield of oil was 0-8 per cent. The crude oil had specific gravity at 

 15 C. = 0-9133 ; rotaticn a v + 6-7 ; refractive index at 20 = 1-4639, and was 

 soluble in 2 volumes 70 per cent, alcohol. The saponification number for the 

 esters and free acid was 7-8. 



On rectification 2 per cent, distilled below 168 C. (rorr.). Between 

 168-183, 84 per cen!-. distilled; between 183-245, 7 per cent, came over, and 

 between 245-265, 4 per cent, distilled. These fractions gave the following 

 results : 



First fraction, sp.gr. at 15 C. = 0-9105; rotation a D + 7-6. 

 Second ,, = 0-9198; ,, + 1-9. 



Third = 0-9354; not taken. 



The cineol determined by the phosphoric acid method was 50 per cent, 

 in the crude oil (O.M.). 



It is thus seen that the oil of this species contains much more cineol than 

 does that of E. rubida, and that phellandrene is absent, consequently it has a 

 higher rotation to the right, and is much more soluble in alcohol. 



