136 



On rectification, i per cent, distilled below 162 C. (corr.1. Between 

 162-183, 9 1 P er cent, distilled; between 183-240, only a few drops came over, 

 and between 240-255, 3 per cent, distilled. These fractions gave the following 

 results : 



First fraction, sp. gr. at 15 C. = 0-9193; rotation # + 1-93. 

 Second ,, ,, ,, = 0-9370; ,, not taken. 



The cineol, determined by the phosphoric acid method in the rectified 

 portion, gave 66 per cent, of that constituent, indicating about 60 per cent, in the 

 crude oil (O.M.). 



Material of this species for distillation was also obtained from Condobolin, 

 N.S.W., in March, 1901. The oil was practically identical with that distilled from 

 the Liverpool trees, and contained the same constituents in practically the same 

 amounts. The yield of oil was 0-51 per cent. The specific gravity of the crude 

 oil was 0-9189, and the optical rotation a D + 3-2. The cineol determined by the 

 phosphoric acid method in the crude oil was 57 per cent. (O.M.). 



Material for distillation was also obtained from Narrabri, N.S.W., in July, 

 1901. The oil was practically identical with the above samples, contained 

 similar constituents in agreeing amounts, and was equally rich in cineol. The 

 yield of oil was 0-49 per cent. The specific gravity of the crude oil was 0-9201, 

 and optical rotation a D + i'4- The cineol, determined by the phosphoric acid 

 method in the crude oil, was 58 per cent. (O.M.). The' crude oil was soluble in i^ 

 volumes 70 per cent, alcohol. 



It will be seen from these results that the oil of this species shows a 

 constancy in composition wherever the trees are growing, and is thus a well 

 stabilised species. 



In the samples recorded above, the oils were distilled from normal leaves 

 of old trees, and the yields of oil are consequently less than would be obtained 

 from young material or from leaves of abnormal growth. This is a peculiarity 

 shown with many species of Eucalypts, and numerous instances of this are 

 given in this work. 



The above samples were mixed together and stored in the dark, and in 

 August, 1919, the oil was again analysed. Not much alteration had taken place 

 during the 20 years the oil had been ' kept, with the exception that the 

 cineol had increased a little in amount. The crude oil and the rectified portion 

 gave the following results : 90 per cent, distilled below 190 C. 



Crude oil, sp. gr. at 15 C. = 0-9238; rotation a D + 2-8; refractive 



index at 20 = 1-4637. 

 Rectified portion ,, ,, = 0-9207; rotation a D + 2-6; refractive 



index at 20 = 1-4608. 



The cineol was determined by the resorcinol method in the rectified portion 

 and calculated for the crude oil ; the result was 78 per cent. By the rapid phos- 

 phoric acid method it was 65 per cent, when calculated for the crude oil. 

 Terpineol was detected in the rectified portion. 



