— 74 — 



EugenoL Colourless or faintly yellow: CI250 1,072 to 1,074*); 

 « D + o°; boiling point 251 to 253 ; soluble in every proportion in 

 alcohol, and in 2 parts 70 per cent, alcohol. 



*) These figures apply to 15 ; at 25 the specific gravity lies between 1,064 

 and 1,067 (comp. table). 



Fennel Oil (Oleum funiculi). Colourless or faintly yellow; 

 d 2 5o 0,953 to 0,973; solidification point not below -}~5 01 ); soluble in 

 an equal volume alcohol, likewise in 10 volumes or less 80 per cent, 

 alcohol. 



1 ) Solidification must in case of need be introduced by inoculation with a small 

 crystal of anethol. The lowest limit of the solidification point might suitably be 

 -\- 4 , as in commercial products it is usually found between -\- 4 and -[- 6°. 



Oil of Hedeoma or American pennyroyal (Oleum hedeomce). 

 Faintly yellow: d 2 5o 0,925 to 0,935; a r> 25 from about -[-18 to 

 -|-2 2 ; soluble in 2 and more vol. 70 per cent, alcohol. 



Oil of Juniper berries (Oleum Juniperi). Colourless, faintly green 

 or yellow; d25o 0,860 to 0,880*); soluble in 10 volumes 90 per cent, 

 alcohol 2 ). 



*) Oil of juniper berries is also frequently lighter; a lowest limit of 0,854 would 

 be more suitable (comp. table). 



2 ) The specification of solubility is mostly only answered by quite fresh distillates ; 

 even when kept in a rational manner the solubility of oil of juniper berries diminishes 

 rapidly. 



Lavender Oil (Oleum lavandula floruiri). Colourless or yellow; 

 d 2 5o 0,880 to 0,892*); soluble in 3 vol. 70 per cent, alcohol. 



*) The lower limit of the specific gravity is not correct; it should read: 0,875 

 (comp. table). 



Lemon Oil (Oleum limonis). Faintly yellow, citral - content not 

 less than 4% 1 ); d 2 5o .0,851 to 0,855; «D25° not below -J-6o° 2 ); 

 «d of the first 10% of the distillate may only differ 2° from the 

 angle of rotation of the oil 3 ). 



*) The citral-determination is made by Sadtler's method (comp. Reports 

 April 1904, 47 and October 1904, 119) with this extension, that in addition to the 

 actual test also a "blind" test without oil is made; this is no doubt a decided 

 step in advance as in this manner the end of the reaction can be observed or 

 approximated somewhat better, but in the tests made by us we have again come 

 to the conclusion, that a really exact determination is not possible even in this 

 manner, and for this reason we must continue, as before, to characterize the method 

 as unreliable. 



2 ) The rotation of lemon oil varies considerably with the temperature; the one 

 given above would correspond to a rotation of 6o°4i' at the usual observation 

 temperature of 20°. As pure oils are frequently met with, with a rotation down 

 to 5 8°, and as most oils rotate about 6o°, the above requirement of the Pharma- 

 copoeia does not take the actual facts sufficiently into account. 



3 ) According to our experience, the difference in pure oils frequently amounts 

 to up to 5 . 



