Note 27 — Chapter VIII · ENGLISH MEASURES OF CAPACITY
Reading edition
It has been suggested that the 280 c.i. corn-gallon was constructed so as to have Averdepois-Troy ratio to the 231 c.i. wine-gallon (1·215 : 1). But the latter had not at the time risen to 231 c.i., and it is more probable that the ratio was that of water to wheat, the pound-pint ratio.