§ 144. FURTHER EXAMINATION OF ETHEREAL OILS. 125 



fig. 7 has been recommended by Thorner.i 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 Homeyer,^^ of parsley 



Fig. 6. 



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

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

 Bniylants (see below) a,nd of arnica by Sigel," the fatty acids 

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



' Ber. d. .1. ohem. Ges. ix. 1868, 1876. See also Bevan, Cheni. News, 

 xxxviii. 183, 1879. 



'' Ber. d. d. chem. Ges. vii. 63 and 1429, 187i (-Journ. Chem. Soc. xxvii. 

 47i). 



^ Ber. d. d. chem. Ges. ix. 268 and 1477, 1876 (.rourn. Chem. Soc. xxx. 78.) 



* Pharm. Journ. and Trans. [3], vii. 263, 1876 ; viii. 191, 1877. 



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



'' Anna! d. Chem, und Pharm. clxx. 345, 1873 (Jouru. Chem. Soc. xxvii. 

 377). 



