— 3i — 



like odour; di 5 o 0,8756; « D -\- 22,9°; saponification number 10,51; 

 does not form a clear solution in 10 vol. 80 per cent, alcohol. The 

 oil consists chiefly of d-pinene, and further contains cymene, ses- 

 quiterpenes, and small quantities of acetic esters. Traces of cineol 

 only could be detected in the portions of the oil boiling about 

 1 7 6°; phellandrene, aromadendral and piperitone were entirely absent. 

 The dark colour of the oil disappeared rapidly on shaking with dilute 

 soda solution. 



2. Oil of Eucalyptus diversicolor F. v. M. (Karri). Yield 0,825 %• 

 The crude oil had a bright lemon-yellow colour, and a turpentine- 

 like odour, and dissolved in 1 vol. 80 per cent, alcohol; diso 0,9145; 

 a D-j-30,i°; saponification number 53,2. A preliminary examination 

 showed that the oil consisted chiefly of d-pinene; it also contained 

 small quantities of cineol (less than 5 °/o m the fraction boiling between 

 172 and 181 ) and about 2O°/ of an acetic acid ester. Phellandrene 

 could not be detected in it. 



3. Oil of Eucalyptus salmonophloia F. v. M. (Salmon Bark Gum). 

 The yield of oil amounted to 1,44 °/ . The crude oil had a reddish 

 colour, and had an odour of pinene and at the same time eucalyptol; 

 it had also a faint secondary odour of aromadendral; d^o 0,9076 (d^a 

 of the rectified oil 0,9052); a n-\-b^°\ saponification number 4,97; 

 soluble in 3,5 vol. 70 per cent, alcohol. Constituents of this oil are 

 chiefly pinene and eucalyptol (about 5O°/ ) and further small quantities 

 of aromadendral. Phellandrene was not present. 



4. Oil of Eucalyptus redunca Schauer (White Gum or Wandoo of 

 Western Australia). The oil obtained in a yield of 1,205% had in 

 the crude state a red colour; when rectified it was almost colourless. 

 The odour of pinene predominated, besides it had the odour of 

 eucalyptol. The remaining properties of the crude oil were: di5oo,9097; 

 "D-f-^S ; saponification number 2,4. The oil only dissolved in 6 vol. 

 70 per cent, alcohol, which must be attributed to the high content of 

 d-pinene. There were further found eucalyptol in a quantity of 

 about 4O°/ , and traces of esters, whilst the higher-boiling portions 

 (about 3 °/ ) consisted of sesquiterpene. The test for phellandrene 

 gave negative results. At the same time leaves of young plants 

 ("suckers") of this eucalyptus species were distilled, and the oil thereby 

 obtained was found identical with the one described above. 



5. Oil of Eucalyptus occidentalis Endl. (Mallet Gum). Yield 0,954 °/ , 

 colour and odour the same as of the previous oil; d^o 0,9135; a r>-j-9°; 

 saponification number 2,48; soluble in 1 vol. 80 per cent, alcohol. The 

 composition is similar to that of E. redunca\ it is only a little richer 

 in sesquiterpene and also contains small quantities of aromadendral. 



6. Oil of Eucalyptus marginata Sm. (Jarrah). The yield of oil 

 differed according as the leaves used were those of old trees or of 



