With two tractors and six males, one California lumber company has reduce and delivered, to the pond on the mill, 40,000 toes of lumber a day. From its top, or from the top of another excessive tree, a gang of males, with the aid of the tractor's winches, runs a steel cable to another tree, probably half a mile away down the hill. The automobiles will slide down and climb out at a nearly uniform pace of 600 toes a minute.