New Fangled Threshing Engine

I began attending steam shows at an early age, and one of my first memories is of a steam traction engine lumbering toward me. They look VERY big to a toddler. I 'discovered' old tractors and gas engines later on, and early machines like this Avery are as enjoyable to watch as a steamer. The technology is not too far removed from the steam traction engines these heavy duty monsters replaced. Note the tall steel wheels, the governor, the exhaust-induced draft, exposed gears, and of course, the heavy construction. They sound pretty neat, too.