SIZE OF POTATO SETS. 
35 
Quartered sets from 3, 4, 5, and 6 ounce tubers showed that the 
greatest frequency occurred at two stems. 
The accompanying diagrams (figs. 7 to 12) present those data in a 
more striking manner than the tabulations. 
/60 
/ 2 3 <2 <S 6 
Fig. 8.— Irish Cobbler stem-frequency correlations 
from halved sets grown at the Virginia Truck 
Experiment Station, 1915 to 1918, inclusive. 
/ 2 3 <z & 
Fig. 9.— Irish Cobbler stem-frequency correlations 
from quartered sets grown at the Virginia Truck 
Experiment Station, 1915 to 1918, inch 
SUMMARY. 
The use of whole or of cut sets for seed in potato production has 
served as a subject of investigation for at least a century and a half 
and is still a moot question. A critical study of the literature on the 
subiect leaves the impression that much of the data presented is 
inconclusive. It also serves to convince the reader that much de- 
pends upon the manner in which the experiment was planned and 
executed whether whole or cut sets gave the most profitable yield. 
