56. "SWEEPS" ATTACHED TO A PLOW-STOCK, FOR "LAYING BY" CORN 

 They cut off large weeds, but injure roots and leave the soil ridged 



67. THE EFFECT OF USING THE ABOVE TOOL FOR CULTIVATING A 

 COTTON FIELD 



Note the high ridges from which much water evajxirates, and the deep furrows which 

 favour the washing away of fine soil 



