OK, I can figure that. When USA was colonised by the British they adopted the Queen Anne gallon, which was a measure of wine volumes as opposed to beer or grain gallons, all of which existed in Britain at the time, and were different sizes in terms of cubic inches contained. Sometime later Britain consolidated the three different measures at an approximate average of 8 pints to the gallon. The Americans however retained the Queen Anne wine measurement of 6 pints to the gallon and didn't "average up"
QED
QED

Comment