Bui. 1465, U, S. Dept. of Agriculture 
Plate 4 
Cans of Soil After Sterilization 
The method of sealing the cans after sterilization and prior to planting is illustrated. The 
water pipe and vent cap are shown at the back of the can in the foreground, the upright 
remnants of the handle in the center, and the hexagonal opening and hole at the center of 
the cover sealed with tape. The joint between the cover and the rim of the can is sealed 
with tape 
