3ul. c4, U. S, Dept. of Agriculture. 



Plate VI. 



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Potato Leaf-Roll, Showing Entire P.ow, No. 2171, Sophie x Keeper, Strongly 

 Affected, WITH Row No. 2165 (at the Right > and Other Adjacent Rows 

 Healthy. Houlton, Me., July 29, 1913. 



