THE POTATO 55 
Cross Section 
9. Make a cross section of one of the potatoes. Notice 
the thin rim of skin; the solid, whitish interior. 
Was there any juice or water when the potato was 
cut? Squeeze the halves; can you now tell why 
the potato has no pinch-sound 2 
Notice the ring of faint dots just inside the skin. 
There are some faint markings to be seen in the cen- 
ter. Can you make them out? Describe them. 
Vertical Section 
10. Make a vertical section, cutting exactly through the 
; middle of the stem. How does this section com- 
pare with the cross section? Is there anything 
new shown by this cut? 
11. Look at the stem end. You may find some faint 
green or greenish lines leading from the stem into 
the potato. 
Cut through oné of the eyes (if the knife did not 
pass through one with the first cut) and you will 
see the lines running from the eyes also. 
Cut through several eyes and see how the lines run 
from eye to eye, and finally to the stem. 
12. Cut the thinnest possible slice from the vertically 
sectioned half, and the thinnest possible slice of 
