1917. The orange-tree diable (fig. 517.) was invented by M. Vallet, nurseryman, Rouen, in the time of Louis XIV. It has no axle-tree reaching across from the one hind wheel (a) to the other (b). When the roller (c) and the bar (f) are removed, the machine can be set back, so as to include a box or tub in the central space between the four wheels; the roller (c) being replaced, the ropes (d d) are put under the hooks of, or by other means fastened to, the tub or box, which, by four handspikes, worked in the roller (c c) by four or more men, is raised six or eight inches from the ground, or as high as the axle, if necessary, and then carted to where it is to be set down. The bar behind (f) is movable, and is replaced and fastened by two iron pins after the carriage is charged. There are several other machines for moving orange trees, but though they are common in France, they are rarely used in England.