Broad Term(s):
Middlings was a coarse, medium-grade flour; A trade name for: the middle one of three grades into which goods are categorized according to quality; Of flour and meal.
"middling, n.1". OED Online. December 2016. Oxford University Press. http://www.oed.com/view/Entry/118171?rskey=g7gGQp&result=1&isAdvanced=false (accessed February 08, 2017).
http://rotunda.upress.virginia.edu/founders/GEWN-05-13-02-0005
http://founders.archives.gov/documents/Washington/05-13-02-0005