§ 144. FURTHER EXAMINA TION OF ETHEREAL OILS. 1 25 



fig. 7 has been recommended by Thorner.^ The method of using 

 it is sufficiently intelligible from the figure, and requires no 

 special description. 



§ 144. Further Examination of Ethereal Oils. — For details of the 

 analysis of ethereal oils by fractional distillation, I refer to the 

 examination of eucalyptus oil by Faust and Homey er,- of parsley 



oil Ijy Gerichten,^ and oil of sage by Muir and Suguira.'* In the 

 investigation of oil of dill by Nietzky,^ of oil of valerian by 

 Bruylants (see below) and of arnica by Sigel,° the fatty acids 

 present in the oil are included. Ethereal salts were found by 



^ Ber. d. d. chem. Ges. ix. 1868, 1876. See also Bevan, Chem. News, 

 xxxviii. 183, 1879. 



- Ber. d. d. chem. Ges. vii. 63 and 1429, 1874 (Journ. Chem. Soc. xxvii. 

 475). 



^ Ber. d. d. chem. Ges. ix. 258 and 1477, 1876 (Journ. Chem. Soc. xxx. 78.) 



■» Pharm. Journ. and Trans. [3], vii. 265, 1876 ; viii. 191, 1877. 



5 Archiv d. Pharm. (3], iv. 317, 1874 (Journ. Chem. Soc. xxvii. 892). 



^ Annal d. Chem. imd Pharm, clxx. 345, 1873 (Journ. Chem. Soc. xxvii. 

 377). 



