Containers should not be calibrated consider using large coffee cans with at least 169 cubic inch capacity if you use attached specifications you may use your other containers and develop your own figures to match. Grains may vary in quality, conditions, etc. Public elevators must strictly adhere to these requirements. For example, if inspectors on a ship find any bad grain the entire ship must be unloaded. Explain that almost all loading operations are automated and computer controlled, but the man responsible must understand the concepts and the actual applications of the math used if he is to handle the job.
Groups find empty weight of ship and record on form.
Assistants weigh four grades of grain. Record weights and 4 values for ounces per cubic inch. Teacher inspect as needed. Groups load correct amounts of various grains into container. Groups submit loaded ships to Chief Inspector for inspection.