C. The Role of the Hind Legs During the Formation of 

 the Diagonal Base (third step of the racing gallop) . 



To be complete, our study must contain an examina- 

 tion of the role which, in addition to that of propulsion, 

 the hind legs play in the formation of the diagonal base. 



The extent of this diagonal base, which, for speed, 

 should be as long as possible, is measured by adding the 



d c 



ab 



Fig, 9. 



Figure 9 is the reproduction of figure 



(position 3). 



horizontal projections, of the fore legs, of the bod}^ and 

 of the hind legs. 



It has been seen in the first part of this work that the 

 more correctly the shoulder and arm are placed, the lon- 

 ger will be the projection of the fore legs; the projection 



The projection of the phalanges is nothing, and that of the femur 

 negative, but it must be noted that the Marey and Pages plates are 

 not taken from a horse at racing speed. At this gait these projec- 

 tions, however small they may be, would certainly have a positive 

 value. 



47 



