This must be at least three inches thick; and as, in this exercise, the hands bear more of the weight than in climbing the upright pole, it should not be attempted until expertness in the other is acquired. _The Horizontal, or Slightly Inclined Bar._ This may be about two inches wide at top, from ten to fifteen feet long, and supported by two posts, respectively six and seven feet high. The climber must grasp with both hands as high a part of the bar as he can reach, and, with arms extended, support his own weight as long as possible. He must next endeavour to bend the elbows so much, that one shoulder remains close under the bar, as seen in Pl XVIII. fig. 4. Or he may place both hands on the same side, and draw himself up so far as to see over it, keeping the legs and feet close and extended. He may then hang with his hands fixed on both sides, near to each other, having the elbows much bent, the upper parts of the arms close to the body, and one shoulder close under the bar; may lower the head backwards, and may, at the same time, raise the feet to touch each other over the bar.--(Pl XVIII. fig. 5.) In the last position, he may move the hands one before the other, forward or backward, and may either slide the feet along the bar, or alternately change them like the hands, and retain a similar hold. Hanging also by the hands alone, as in Pl XVIII. fig. 6, he moves them either forward or backward, keeping the arms firm, and the feet close and extended. Or he may place himself in front of the bar, hanging by both hands, and move laterally. Being likewise in front of the bar, with his hands resting upon it, as in Pl XVIII. fig. 7, he may move along the bar either to the right or left. In the position of Pl XVIII. fig. 5, the climber may endeavour to sit upon the bar, for instance, on the right side, by taking hold with the right knee-joint, grasping firmly with the right hand, and bringing the left armpit over the bar. The riding position is thus easily obtained. From the riding position, he may, by supporting himself with one thigh, turn towards the front of the bar, allowing the leg of the other side to hang down; and he may then very easily move along the bar sideways, by raising his body with his hands placed laterally on the bar. _The Rope Ladder._ This should have several rundles to spread it out, and ought, in all respects, to be so constructed, as not to twist and entangle. The only difficulty here is that, as it hangs perpendicularly, and is flexible, its steps are liable to be pushed forward, and in that case, the body is thrown into an oblique position, and the whole weight falls on the hands. To prevent this, the climber must keep the body stretched out and upright.--(Plate XVIII. fig. 8.) _The Upright Rope._