12 



HISTOEY, BOTANY, ECONOMIC USES, 



augment the bulk of the sifted powder. This product can 

 then be weighed and preserved in closed vessels." 



Dr. Ives found, on analysis, the lupulinic grains to contain 



Tannin .. .. 

 Extractive . . 

 Bitter principle 

 Wax .. .. 

 Eesin 

 Lignin 

 Loss 



4-16 



8-33 



9-16 



10-00 



30-00 



38-33 



02 



100- 



The following analyses are useful for reference, as showing 

 the percentage quality of the different hops of commerce, 

 chiefly those of the Continent : 



Turpin recognized in the glands of the hops the presence 

 of two vesicles in which an etherized oil existed, and Easpail, 

 by a more careful examination, found chlorophyl, a resinous 

 substance, an etherized oil, and some gluten in them. Pay en 

 and Chevallier analyzed hops from different sources, and they 



