2772. Simms, F. R. Feb. 5. Traction engines; portable engines.-A motor tractor is furnished with a pulley for driving machinery, such as thrashing-machines, and mowing-machines, mounted on a shaft which can be driven when the tractor is stationary. Fig. 2 shows the shaft n carrying the pulley o, and driven through the variable-speed gearing when the tractor driving-gear is out of action. Also the front axle of the vehicle is pivoted, so that it may move in a vertical plane, thus allowing the wheels to adapt themselves to the inequalities of the ground. This is shown in Fig. 3. The upright pillar k, on which the axle is hinged, is held in the bracket l and may be moved therein to allow for steering.