Abstract: A row crop harvester is provided with mechanism for mounting two picking heads for both vertical and horizontal adjustment of the ground engaging lower ends of the heads, to simultaneously harvest two rows of plants which may vary in spacing from each other throughout their lengths. One head is guided along its row by steering the harvester itself, while the lower end of the other head is guided along its row by selectively operating controls which transversely shift the lower end of the head relative to the first mentioned steerable head thereby accurately following and simultaneously harvesting two rows of crops such as root crops.In the preferred embodiment the upper end of each picking head is associated with a severing mechanism for removing the tops or foliage from the roots of the plants.

Abstract: A machine for guiding melons from the ground onto lifting and distributing conveyors, having a fence for guiding melons along the ground toward a lift wheel which is rotating about a substantially horizontal axis, the wheel having flexible fingers extending radially therefrom to sweep the melons toward an upwardly inclined conveyor belt.

Abstract: Apparatus utilizes two or more orifices in series, fixed normal to the flow field, which provide a pressure reservoir from which the static pressure is sensed for the purpose of sensing variations in flow within a tube. The apparatus comprises a plurality of orifices, flow regulators, pressure repeaters and electrical pressure switches all connected so as to function as a complete system.