169 



The crude oil had specific gravity at 15 C. = 0-9138 ; rotation a D + 8'5 6 ; 

 refractive index at 20 = 1-4638, and was soluble in i^ volumes 70 per cent, 

 alcohol. The saponification number for the esters and free acid was 14-85. 



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

 162-183, 83 per cent, distilled ; and between 183-195, n per cent, distilled. 

 These fractions gave the following results : 



First fraction, sp. gr. at 15 C. = 0-9117; rotation a D + 875. 

 Second ,, =0-9176; ,, D + 3-25. 



The cineol, determined in the first fraction by the phosphoric acid method, 

 was 62 per cent., or about 55 per cent, in the crude oil. (O.M.). 



The above sample had been stored in the dark, and in February, 1920, 

 was again analysed. The specific gravity had increased, as had also the cineol. 

 90 per cent, distilled below 190 C. The crude oil and the rectified port'on gave 

 the following results : 



Crude oil, sp. gr. at 15 . 0-9362; rotation a D + 8-1 ; refractive index 



at 20 = 1-4643. 

 Rectified portion ,, 0-9225; rotation a + 6-8 ; refractive index 



at 20 = 1-4597- 



The cineol was determined by the rapid phosphoric add method in the 

 rectified portion ; when calculated for the crude oil the result was 65 per cent. 



The oil was acetylated in the usual manner, when the saponification 

 number had increased to 66, indicating the presence of about 12 per cent, of 

 free alcohol. 



91. Eucalyptus Australiana. 



(R.T.B. & H.G.S., Proc. Roy. Soc., N.S.W., 1915, p. 514-) 

 Black Peppermint. 



Systematic. It attains forest tree height, but more often is only a medium 

 sized tree. The bark is persistent well out on the branches, and is typically 

 " peppermint," being of a compact, fibrous nature. Abnormal leaves sessile, 

 oppos'te, cordate-lanceolate. Normal leaves narrow, lanceolate ; venation dis- 

 tinct, lateral veins very oblique, intramarginal vein removed from the edge. 

 Peduncles axillary, with about ten to twenty flowers ; calyx turbinate, short ; 

 operculum obtuse, flattened. 



Fruit. Pilular to turbinate, rather small, compara- 

 tively; with red rim, countersunk when 

 fully ripe, and a thin contracted edge; 

 valves not exserted ; from 2 to 3 lines in 

 diameter. 



The insloped rim is perhaps the best feature by which 

 to separate these fruits from those of E. amygdalina, 

 but their shape differs very little, if any, from E. 

 amygdalina, var. nitida, and E. phellandra. 



Habitat. Yourie, Reedy Creek, Tanto, Nerrigundah, as far 

 south as Wyndham, Burraga and Black Springs, 

 Bathurst district, all in New South Wales. 



50068- -M 



