75 



tion always remains : there especially remains a 

 coloring substance which darkens the juice in pro- 

 portion as it is concentrated by evaporation. 



On the other hand, the treatment of the juice by 

 carbonic acid, is not so complete but that it leaves a 

 certain quantity of lime. When the juice has been 

 treated by lime and carbonic acid therestjj^ft^a^a^,,^^ 



Some azote substances, J/^> 



Some coloring matter, ff --- - 



\LIBRAIi 



Salts of potash and soda. 



. 

 So as to eliminate the- greatest possjl 



these substances, the juice and syrup mi 

 in broken charcoal. 



Charcoal in fact, 



Takes away the azote substances, 



Renders colorless the juice and syrup, 



Absorbs the lime, 



Absorbs the greater part of the alkaline salts. 



I finish this section by giving the average com- 

 position of a sugar beet, 



Sugar 12.00 



Azote combinations 1.50 



Ashes (salts) 1.00 



Cellular and other matters 4.70 



Water... . 80.80 



100.00 



