$ 144. FURTHER EXAMINATION OF ETHEREAL OILS. 125 



fig. 7 has been recommended by Thorner. 1 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, 2 of parsley 



Fig. 6. 



oil by Gerichten, 3 and oil of sage by Muir and Suguira. 4 In the 

 investigation of oil of dill by Nietzky, 5 of oil of valerian by 

 Bruylants (see below) and of arnica by Sigel, 6 the fatty acids 

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



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

 xxxviii. 183, 1879. 



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

 475). 



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



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



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



6 Annal d. Chem. und Pharm. clxx. 345, 1873 (Journ. Chem. Soc. xxvii. 

 377). 



