9O THE BOOK OF USEFUL PLANTS 



their own needs in this way. Canada makes a 

 good deal of maple sugar still. 



It is interesting to note that the savages of our 

 northern woods supplied themselves with maple 

 sugar, just as the tropical savages get this needed 

 food from palm trees and sugar-cane. 



Soft maples yield sugar, but not in quantities 

 that pay for the hard work of evaporating their 

 thin sap. 



