Climbing spur

1773. The climbing-spur (fig. 418.) is of two sorts, one with, and the other without a stem. The first sort (a) is fastened to the upper part of the leg with a leather belt (b); the other sort (c) is tied to the feet. By means of these spurs, one on each foot, naked-stemmed trees may be ascended to any height, and when it is wished to stop a short time at any part, the screw of the ring (d) is entered in the trunk, and forms a firm point for one foot. (Lasteyrie, Coll. de Machines, &c.)