Corn In vestiga tions 
97 
Fig. 22. — Cress section of a full-grown cornstalk near base, showing cel- 
lular structure and arrangement of vascular bundles. Enlarged five 
diameters. The effects of inbreeding and crossing on these and 
other histological units are given in Table 38. 
In cross section of the stalk near base, ten hybrids compared with 
their pure line parents averaged approximately 117 per cent greater 
area, 92 per cent more pith cells, 46 per cent more vascular bundles, 
8 per cent greater pith cell diameter, and 15 per cent greater bundle 
diameter. 
