Elastic Car Wheelll. Grigg's method of introducing wedges of wood between tho rim and tire of locomotive driving wheels has been adapted by him to the wheels of passenger cars. The rims of the wheels have dovetailed recesses cast in them, the tires are then slipped on, and blocks of seasoned hard wood are driven into the recesses, firmly holding the tire and releasing its hearing from the iron. On locomotive driving wheels it prevents the stretching of the tires and the necessity of fre quent

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... himming" up, and is said to be much easier on the permanent way and the rolling stock than the ordinary method. This application of the improvement has been thoroughly tested with satisfactory results, and is believed to be equally beneficial when applied to car wheels.