- 8 3 - 



3 ) All essential oils dissolve in carbon disulphide; any cloudiness occurring 

 thereby must be attributed to the small content of water due to the manner of 

 production of the oils. 



Cinnamon Oil, Ceylon [Esencia de caneld). Golden yellow, 

 in course of time reddish; d^o 1,004 to 1,006 1 ); «d slightly to the 

 left; nitric acid test, ferric chloride reaction. 



*) Ceylon cinnamon oil has at 15 a specific gravity of 1,023 to 1,040. 



Citron Oil 1 ) {Esencia de cidrd). Obtained from the peel of the 

 cedro or citron by expression or distillation with water vapour 2 ); 

 colourless 3 ) or yellowish; d^o 0,852 to 0,856 4 ); a D to the right; soluble 

 in every proportion in carbon disulphide and in 95 per cent, alcohol; 

 with weaker alcohol cloudy solutions are formed 5 ). 



1 ) As citron oil is not a commercial article, its admission to the Pharmacopoeia 

 is difficult to explain. 



2 ) The oils obtained by distillation are inferior. 



3 ) Only the distilled oils are colourless. 



4 ) "With reference to the specific gravity of citron oils, comp. our Reports 

 April 1902, 30, October 1902, 35, and April 1903, 34. 



5 ) The solutions in carbon disulphide are usually slightly turbid owing to the 

 content of water in the oil; of 95 per cent, alcohol about 0,5 to 1 vol. are required 

 to form a clear solution. 



Clove Oil [Esencia de clavo). Freshly distilled colourless, sub- 

 sequently yellowish, reddish, or brown; d^o 1,04 to 1,06 x ); «d to the 

 left; acid reaction; ferric chloride must not cause blue coloration. 



*) The specific gravity is occasionally also higher, up to 1,07 (15°). 



Eucalyptol [Eucaliptol). Colourless; d o 0,940*); at a low tem- 

 perature solidifying into a crystalline mass, which melts again at i° 2 ); 

 boils at 174 03 ); soluble in every proportion in absolute alcohol, in 

 carbon disulphide and in glacial acetic acid. 



*) The specific gravity of eucalyptol at 15 is 0,928 to 0,930. 



2 ) The melting point does not lie at -f- 1°, but at — i°. 



8 ) Eucalyptol boils at 760 mm between 176 and 17 7 . 



Eucalyptus Oil [Esencia de eucaliptd). Colourless or yellowish; 

 d 15 o 0,90 to 0,92*); «d to the right; neutral; soluble in an equal part 

 by weight of alcohol. 



1 ) More correct is an upper limit of 0,93. 



Lavender Oil [Esencia de espliegd). Colourless, yellowish or 

 greenish-yellow; d 15 o 0,87 to 0,94*); a D to the left; acid reaction; so- 

 luble in every proportion in 85 per cent, alcohol. 



The oil of Lavandula spica D. C. is dextrorotatory. 



*) The limits of value are here so far apart, that most adulterated oils would 

 also answer the requirements; with pure oil, the specific gravity fluctuates between 

 0,882 and 0,895 (15 ). 



Lemon Oil [Esencia de Union). Obtained from the peel of the 

 lemon by expression or distillation by water vapour 1 ). The oil obtained 



6* 



