The petrol trickles from the tank into the carburettor, and is kept at a constant level by means of a float which acts in a very similar way to the ballcock of a water cistern.
"The Mastery of the Air"
William J. Claxton
And there Captain ballcock was for taking his leave; but Moll, detaining him, says: "We owe you something more than gratitude-we have put you to much expense."
"A Set of Rogues"
Frank Barrett