This beautiful Crossley Brothers Slide Valve engine is on display at the Cool Spring Power Museum. Slide Valve engine were some of the first engines built, named after the sliding plate that moves across the cylinder head. Antique Tractor Life, it's not just a hobby, its a lifestyle. #tractor #engine #dieselengine #tractors #diesel #gasengine #history #farming #mechanical #Engineering | Antique Tractor Life