Popcorn has been a favorite American treat for many years. Over 300 million pounds were sold in the United States in 1956. If this 300 million pounds were popped all at once, it would fill more than 3,500 boxcars and make up a freight train that would reach from Council Bluffs to Cedar Rapids.
Thomas, W. I. and Eldredge, J. C.
"Mmm --- Popcorn!,"
Iowa Farm Science: Vol. 12
, Article 4.
Available at: https://lib.dr.iastate.edu/farmscience/vol12/iss10/4