24 



ADULTERATED DRUGS AND CHEMICALS. 



Jeancard and Satie" have studied these oils to some extent, and 

 think they can distinguish between them by their contents. The fol- 

 lowing table is taken from their work: 



Analytical data on pure geranium oih. 



The per cent of esters and alcohols is based on the formulae C 12 H 20 O 2 

 arid C 10 H 18 O, respectively. 



In view of the fact that the highest-grade oils grow in certain locali- 

 ties only and bring fancy prices, the opinion is ventured that it would 

 not be safe to deduce any general statement from the above results, 

 except in the case of Indian oil. 



Some time ago the writer received a number of samples of geranium 

 oils in original packages bearing the labels of the largest and best- 

 known essential-oil dealers in the world, with the request that an 

 opinion be given as to their purity and quality. On submitting the 

 samples to an examination the results tabulated below were obtained: 



Analyses of geranium and allied o/7.s-. 



a Per rent of ester calculated as geranyl acetate. 



The acid number was determined by dissolving a given weight of 

 the oil in strong alcohol, in which aH the oils were soluble in all pro- 

 portions, and titrating with decinormal alcoholic potash, at the ordi- 

 nary temperature, using phenolphthalein as indicator. The figures 



Bul. Soc. Chim., 1900 (3), 28: 37. 



