234 MASS. EXPEEIMENT STATION BULLETIN 180. 



on the inner side of the rim, this increase in property being mostly clear 

 gain. 



The sanding rim can be constructed most advantageously when a 

 bog is built. Its development after the bog is planted is attended with 

 some difficulties. Among these the extra cost of turfing the upland adja- 

 cent to the bog, and the liability in resanding of seeding the bog more or 

 less with certain troublesome weeds, should be especially considered. 



