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 ground only as the left fore leg rises. Therefore, is the theory of locomotion false which holds that one limb cannot leave the ground until after its mate has made contact. The sophists will reply that locomotion is always a succession of falls. Very true, but these falls operate successively upon the front legs as each in turn goes forward at the walk, the trot, or the gallop; there is no crossing over of the feet at each step, right to left or left to right.

Consider the case where the fall is greatest. The leaping horse is entirely out of contact with the ground. It comes to the ground at the end of the leap, with its two front legs extended; and immediately after, the hind legs also come down. Is this natural to the anatomy of the animal? Yes! But suppose that the horse finishes the leap with its two front legs in the position demanded by the pirouette or the half passage. What will be the consequence? Answer me, please!

Returning now to the effects employed to execute the pirouette, the front hand has to be unloaded, and the hind legs, which are the support and pivot, have to be loaded, especially the left hind leg. The rider must, therefore, carry the line of his body backward from the perpendicular, and also bear more heavily on the left haunch. The right fore leg, since it makes the longer step, has to be unloaded by a very slight effect of the right rein. But as this right fore leg is to travel over from right to left, the right rein must bear upon the right side of the neck, the hand