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represents a colourless or faintly yellowish, strongly refractive liquid; 

 (I150 0,980 to 0,990*); soluble in 1,5 to 5 vol. alcohol. 



*) It is recommended to determine the specific gravity at 20 , as anise oil 

 sometimes solidifies already spontaneously at 15 ; the above limits of value also 

 apply to 20 . 



Clove Oil {Aetheroleum caryophylli). In the fresh state bright 

 yellow, in the course of time acquiring a brownish colour; d^o 1,045 

 to 1,070; soluble in 2 vol. dilute alcohol. 



Fennel Oil {Aetheroleum foeniculi). Colourless or faintly yellow; 

 diso 0,965 to 0,975; soluble in an equal vol. alcohol; when cooled 

 to about -{- 5°, it should solidify to a crystalline mass. 1 ) 



1 ) Solidification must sometimes be started by inoculation with a small quantity of 

 solid anethol, as under certain conditions fennel oil may be cooled much below its 

 solidification point without actually solidifying. 



Lavender Oil {Aetheroleum lavandulae). Light yellow or greenish 

 yellow; d^o 0,885 to 0,895; soluble in every proportion in alcohol, 

 and in 3 vol. dilute alcohol. 



Lemon Oil {Aethet oleum citri). Light yellow; di 5 o 0,858 to 0,861 *); 

 with 5 vol. alcohol it forms a not quite clear solution; lemon oil must 

 not show a strong acid reaction. 



*) It would have been better to have given 0,857 as lower limit of value. 



Menthol {Mentholum). Colourless, brittle, needle-shaped crystals, 

 not moist. M. p. 43 01 ); b. p. 2 1 2° 2 ); only very slightly soluble in 

 water; very readily soluble in alcohol, ether, chloroform, and fatty oils. 

 When heated in an open dish on a water-bath, menthol should evap- 

 orate completely. 



*) The m. p. of menthol, taken exactly, lies between 43,5 and 44,5°. 



2 ) Menthol boils about 217 if the mercury thread of the thermometer is entirely 

 placed in the steam. 



Oil of Parsley Seed [Aetheroleum petroselini). Viscid,' yellow- 

 ish to brownish yellow; d 15 ° 1,050 to 1,100; soluble in an equal 

 vol. alcohol. 



Peppermint Oil {Aetheroleum menthae piperitae). Colourless, yellow- 

 ish or greenish yellow; di 5 o 0,900 to 0,920*); at 20 soluble in 

 3 to 5 vol. dilute alcohol; when more solvent is added, at most a 

 slight cloudiness may occur. 



*) According to the specific gravity, both English and American oils are allowed. 



Rose Oil {Aetheroleum rosae). Light yellow, sometimes greenish 

 yellow and fairly viscid. At a temperature below 18 to 21 , pointed 

 or laminated crystals separate out from the oil, and if cooled further, 

 the oil solidifies completely; d2o° 0,855 to 0,870; only partly soluble 

 in alcohol. 



