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APPENDIX N 



ground) all of the legs are flexed under the body. The first foot to 

 strike the ground will be the hind foot diagonal to that from which the 

 spring was effected. (See Fig. 66 below.) 



" This movement [the gallop] has in all ages been employed by artists to convey the im- 

 pression of great speed, although, curiously enough, the phase in which the horse has been 

 almost invariably depicted is one which is impracticable during uniform progressive motion, 

 and conveys no such impression to the careful observer." E. M. 



FlG. 66. Some Consecutive Phases of the Gallop. 

 The stride is completed at 12. 



We call special attention to the following extracts from the defini- 

 tions of step and stride, as applied to the progressive movements of 

 man and the lower animals. 



Step. In animal locomotion, an act of progressive motion in 

 which one of a pair of the supporting members of the body is thrust in 

 the direction of the movement, involving the transfer of the support 

 from the one member to the other. 



" In the bipedal walk or run a step is one-half of a stride or full round movement. With 

 all quadrupeds, except the kangaroo and other jumpers, four steps are necessary to complete 

 a stride. In the walk these steps take place at approximately regular periods of time. In 

 the trot the diagonals, and in the rack the laterals, make a step almost simultaneously. In 

 the amble, the canter, and the gallop, these steps occur at irregular intervals of time." 



Stride. In animal locomotion, an act of progressive motion, com- 

 pleted when all the feet are returned to the same relative positions 

 they occupied at the beginning of the notation of the movement. 



" The normal stride of a biped consists of two uniformly executed steps. The normal 

 stride of a quadruped consists of four steps. These steps may occur at separate and approxi- 

 mately regular periods of time, as in the walk ; at separate and irregular periods of time, as 

 in the amble, the canter, and the gallop ; or in pairs, as they are effected during the trot 

 with the diagonal, and during the rack with the lateral, members. 



