164 THE AMERICAN NATURALIST [Vol. LII 



London, where all of our American sealskins were dressed 

 and dyed for the market. Now, however, this industry 

 has been established in the United States, and in 1914 

 gall-nuts worth $17,174 were imported from Bagdad for 

 this purpose. As the method of dyeing sealskins is a 

 very jealously guarded trade secret the American firm 

 engaged in this enterprise has had to work out its own 

 processes, and according to the Commerce Reports this 

 has been successfully accomplished and one sale of Amer- 

 ican sealskins dressed and dyed in America has taken 

 place, in St. Louis, in September, 1916. 



Analysis.— A gall so widely known and of such great 

 value has of course been analyzed many times and is the 

 standard for the analysis of others. According to Trimble 

 the most generally accepted analysis is that made by 

 Guibort, which is as follows : 



Gallie acid 



Ellagie acid -j 

 Luteo-gallic acid J 

 Chlorophyll and volatile o 



Woody fiber 



Sugar 



Albumen 



Gallate of h 

 Oxalate of ] 

 Phosphate 



Cynips insana West wood 

 A gall somewhat resembling the Aleppo gall and often 

 confused with it is that produced by Cynips inscma West- 

 wood. It is better known as the mad apple of Sodom, 

 Dead Sea fruit, or Mecca or Bussorah gall, and is found 

 in Palestine, Asia Minor, Albania and Italy on Quercus 



