Final answer:
In the doubling system of capacity measure, there are 2 mouthfuls in a jill, 4 mouthfuls in a cup, and 8 mouthfuls in a pint. When pouring one unit of each measure into an empty pail, it will be exactly filled with no room for more mouthfuls.
Step-by-step explanation:
In the doubling system of capacity measure, there are 2 mouthfuls in a jill, 4 mouthfuls in a cup, and 8 mouthfuls in a pint.
In the given system, one mouthful, one jigger, one jack, and one gallon are poured into an empty pail. The pail will be exactly filled because each unit is double the previous one. So, there is no room for more mouthfuls in the pail.