PLATE io 
Cross sections through the periderm of tubers. 
A—Irish Cobbler. X 36 
B. —Irish Cobbler. X 36 
C. —Bliss Triumph. X 3 6 
D. —Michigan. X 36 
E—Rose. X 36 
F. —Rose. X 36 
G. —Ohio. X 36 
H. —Hebron. X 36 
I. —Burbank. X 36 
J. —Burbank. X 36 
K. —Green Mountain.. X 1SS 
L. —Green Mountain. X 36 
M—Rural. X 36 
N.—Rural. X IS 5 
O—Pearl. X 36 
P. —McCormick. X 36 
Q. —McCormick. X 36 
R. —Up-to-date.. X 36 
