40 



On rectification the usual amount of acid water and aldehydes came over 

 below 157 C. (con-.). Between 157-102°, 59 per cent, distilled; between 

 [62 r.83 ". 22 per cent, came over; between 183-255°, 7 per cent, distilled; and 

 between 255 279°, 5 per cent, distilled. These fractions gave the following 

 results : 



First fraction, sp. gr. at 15° C. = 0-8658; rotation a B + 4-5°. 



Second „ „ „ = 0-8673; „ + 1-5°. 



Third ,, ,, ,, = 0-9053; ,, not taken. 



Fourth ,, ,, ,, = 0-94(14 ; 



The rotation figures indicate that both optically active pinenes were 

 present in the oil of this species, as well as a trace of phellandrene in the 

 freshly-distilled oil. 



This sample of oil had been kept in the dark, and in September, 1919, 

 nineteen years afterwards, was again analysed. But little alteration had taken 

 place in the oil during all that time. The specific gravity had increased a little, 

 but no less than 84 per cent, of the oil distilled below 190 C. The crude oil and 

 the distillate gave the following results :— 



Crude oil, sp. gr. at 15 C. = 0-8925 ; rotation not taken ; refractive index at 



20 = 1-4749. 

 Large fraction ,, ,, = 0-8712; rotation a„ + 4-8°, refractive index at 



20 = 1-4684. 

 The amount of the fraction absorbed by the resorcinol method was equal 

 to 10 per cent, when calculated for the crude oil, the greater portion of which 

 was cineol. 



11. Eucalyptus saligna. 



(Sm., in Trans. Linn. Soc. iii, 285 — partly). 

 Sydney Blue Gum. 



Systematic. — A tall tree, growing to its greatest height and perfection in 

 the gullies of the coast. Bark either smooth, bluish-white with a silvery sheen, 

 or rough at the base, similar to that of E. robusta. Abnormal leaves alternate, 

 lanceolate. Normal leaves lanceolate, occasionally falcate, drying a bluish- 

 green, pale on the underside ; intramarginal vein close to the edge ; transverse 

 veins numerous, fine and parallel (slightly oblique). Peduncles axillary, with 

 few, mostly five to seven flowers, either on a slender pedicel or almost sessile ; 

 calyx turbinate or conical ; operculum hemispherical, shortly acuminate. 



Fruit.— Mostly more hemispherical than shown 

 in the plate, pedicellate or sessile ; rim thin ; 

 valves slender, expanded, sharp-pointed, 

 and well exserted ; 3 lines long, >| lines in 

 diameter. 



The valves inserted just below the run is a good 

 specific feature by which to determine the fruits. 



Habitat. — Mostly in, or at, the head of gullies in the Coastal 



districts of New South Wales. 



