Maples 



FIG. 15. Collecting the sap. 



U. S. Forest Service 



stay in the camps at night. Nevertheless, much labor 

 is required to produce a gallon of sirup or a few pounds 

 of sugar. Can you think of three reasons why genuine 

 maple sugar is expensive ? 



The maple-sugar industry has become so important 

 in some of the Northern states and Canada that those 

 who engage in it make use of improved evaporators. 

 These are broad, shallow pans with a number of parti- 

 tions that do not reach entirely across the pan. The 

 openings left between these partitions and the sides of 

 the pan alternate, so that the sap in flowing around the 

 partitions goes from one side of the evaporator to the 

 other. As water is continually being driven off by the 

 fire under the pan, what was at first thin sap has become 

 thick sirup by the time it reaches the farther end of the 



