Bui. 64, U. S. Dept. of Agriculture 
Plate XIII. 
Z3373 Cur/y-c/^varf 
/302S leaf-ro// 
Fig. 1 .—Potato Leaf-Roll (below) and Curly-Dwarf (above), Showing the 
Yield of Healthy and Diseased Hills of the Same Variety. Houlton, Me., 
September, 1913. 
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c/warf 
Fig. 2.— Potato Curly-Dwarf. Comparison of the Yield of Healthy and 
Diseased Hills of the Same Varieties. Houlton, Me., September, 1913. 
