I20 THE HORSE IN MOTION. 



and the diagonal hind is advancing to the support of the centre of 

 gravity. Comparing this with Plate LXV., in which one figure is 

 wanting, the correspondence will be found so close that at first sight 

 it is difficult to convince ones self that they are not identical pic- 

 tures; but on careful inspection it will be perceived that in the 

 quartette the body is less advanced and the supporting leg is farther 

 from the perpendicular. The missing picture should be the first 

 in the regular order. 



Comparing again this plate with Plate CII., the body of the horse 

 will be found to have advanced from the position in the former until 

 the supporting leg is quite perpendicular, and the other limbs are 

 relatively advanced. 



In Plate CIV. there is still further advance; the foot is under 

 the centre of gravity, and the posterior extremities are being gath- 

 ered under the body in the order with which they will successively 

 take their turn. 



Plate LXXVIII. exhibits the same movement on the instant that 

 the propulsive effort of the limb is concluded and the foot is leav- 

 ing the ground. From this last position there is an interval of one 

 fifth of a stride, in which there is no support given to the weight 

 of the body, but it is moving as a projectile until the diagonal hind 

 foot reaches the ground, which it is about to do in the following 

 plate. The left hind foot will be the first to make the contact, from 

 which we know that the right fore foot was the one bj'' which the 

 body had been projected into the air; the right hind foot will follow 

 and take the ground a step farther in advance. This plate may be 

 compared with LXX., in which the right feet are in corresponding 

 positions with the left, as seen in the former. Plate XC. represents 

 the horse in a similar position. 



The slow trot is shown in Plate LIX., and is not distinguishable 

 from the fast walk, as seen in the succeeding plate ; it is only when 

 the instant of exposure of the sensitive plate of tlie camera is coin- 

 cident with that in which all the feet are off the ground that the 

 walk can be distinguished from the slow trot. 



Plate LXI. is also an attitude of the trot, but it is recognized by 



