Bui. 195, U. S. Dept. of Agriculture. 
Plate VII. 
mm 
mi 
m* 
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m 
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* ^'^v 
Fig. 1.— Potato Seedlings on the Potomac Flats, Washington, D. C, 1910. 
^5 
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'-*z. -y 
■ v 
♦ ^-^ 
KD 
j^ i /y^-i-^-i 
t!-> ^j.T^ 
Fig. 2.— Studying and Describing the Progeny of Potato Seedlings at Arling- 
ton Farm, Winter of 1910-11. 
