— 139 — 

 j Coriander Oil {Oleum Coriandri). « D +8 to + 14°, occasionally lower 1 ). 



J ) We have never observed pure oil with cc D lower than -\- 8°. 



Cubeb Oil (Oleum Cubebce). d 15 , 5 o 0,910 to 0,930; « D — 25 to —40°. 



Dill Oil (Oleum Anethi). d 15 , 5 o 0,900 to 0,915^; « D + 70 to + 80°, 

 sol. in 3 vols 90°/ alcohol. 



x ) The minimum limit is too high; it should be 0,895. 



Eucalyptus Oil (Oleum Eucalypti). d 15 , 5 o 0,910 to 0,930. 

 Fennel Oil [Oleum Foeniculi). d 15l5 o 0,960 to 0,990^. 



x ) The maximum limit was given more correctly in the 1907 Edition as 0,980. 



Juniper Oil (Oleum Juniperi). d 15(5 o 0,862 to 0,890^; « D usually about 



— 4 to — 6°, rarely exceeding — 12°. Oil from the leaves and branches 

 has opt. rot. about + 8,5°. 



x ) We have found commercial oils of good quality to possess a sp. gr. of 0,860. 



Lavender Oil (Oleum Lavandula?). d 15 , 50 0,882 to 0,900; ester content 

 (linalyl acetate) 7 to 11% (English oil) and 25 to 45°/ (French oil) 1 ). 



A ) In the case of steam-distilled oils as much as over 50% is observed. 



Lemon Oil (Oleum Limonis). « D + 58 to + 65°, occasionally up to 



— 66°; the optical test for the first 10% of the distillate has been omitted. 

 Terpene-free lemon oil 1 ): d 15 , 5 o 0,895 to 0,900; « D — 5 to — 8°; citral 

 content 40 to 50%. 



x ) It is impossible to lay down definite limits of value for terpene-free oils, as their 

 properties vary according to the process of manufacture. 



Lemongrass Oil 1 ) (Oleum Graminis citrati). d 15)5 o 0,895 to 0,905; in 

 West Indian Oil 0,878 to 0,882 2 ); minimum citral content (bisulphite 

 method) 70%. 



*) Andropogon citratus , D. C. is mentioned as the parent-plant, a designation which, 

 according to the most recent investigations, applies only to the variety of lemongrass which 

 yields the imperfectly-soluble oil. Comp. Report April 1907, 33, 34. 



2 )~In this case also the sp. gr. is very frequently considerably higher. 



Mustard Oil (Oleum Sinapis volatile). B. p. 147 to 156°. 



Nutmeg Oil (Oleum Myristicce). d 15f5 o 0,870 to 0,930; « D + 13 to + 30° x ); 

 sol. in 3 vols. 90% alcohol. 



x ) Oils prepared in our own works from the best material have given opt. rot. as low as 

 -f 7° 52'. Comp. Report October 1904, 66. 



Orange Oil (Oleum Aurantii). di 55 o 0,847 to 0,854 x ); « D + 95° (+ 92° 

 *r bitter oil) 2 ) to +98°. 



*) In Bitter Orange Oil the sp. gr. ranges from 0,852 to 0,857 ; in sweet oil from 0,848 to 0,853. 

 2 ) We have observed a minimum of 89° in bitter oil of unquestionably reliable origin. 



Pennyroyal Oil (Oleum Pulegii). « D + 13to +35°. 



Peppermint Oil (Oleum Mentha? piperita?). « D — 18 to — 35°, rectified 

 oil is soluble in 4 vols, of alcohol (70%). 



