Clayton Knight, The non-stop stowaway (1928)
“ Kiwi went to work with a will—unlashed the cans, unscrewed the tops, and passed them over to Jack who, standing on his seat, poured the fuel into the main tank. They disposed of five of them. As Jack opened the sliding panel of glass beside him, a terrific stream of air blew into the cockpit, and he hurled each can in turn as far out and down as he could, so that they would not be carried back into the tail. Kiwi looked out of his little side-window to see them tumbling into space, turning over and over, the light glinting on them as they fell. ”
