n. a low sledlike contrivance, sometimes having shaped log-runners, used for removing stones from fields and for other heavy hauling. [See picture at stoneboat.]
1887  (1952)  Then we loaded them on the stoneboat, drawn by the oxen.
1901  In the afternoon the colt was put through her morning experience, with the variation that the stone-boat was piled up with a fairly heavy load of earth and stone.
1963  We brought out two hams . . . and between stoneboat loads of heavy sod we made great inroads into them. . . .