Balls! with which Stephenson has tamed the steam and harnessed it to do the work of man, small as you are, each flywheel, shaft and beam is subject to your governance, your plan. Some, in their innocence, were unimpressed. 'A top, a whirligig, a childish gift, a bagatelle', they said, but little guessed: the faster you revolve, the more you lift. And even as you rise, you stem the flow through cylinder and piston, ease the thrust on cam and bearing, mollify the show to dignified decorum, as needs must.