1912. Tree-transplanting machines of two or more species have been invented. The pole and wheel-machine is, for general purposes, one of the best, and is, indeed, the foundation of all the others. It consists of a long beam or pole, attached to an axle and wheels. The tree being prepared for removal, and the pole, placed in a vertical position against it, the stem or trunk is attached to it by ropes; thus attached, the tree and pole are brought into a horizontal position, by men or horses, with the ball of earth attached to the tree. Horses may then be yoked to the axle at the opposite end of the pole, or root end of the tree, with or without the aid of another axle, and the tree drawn to any distance, and planted. Figures and descriptions will be given of some other transplanting machines under Arboriculture.