MODES OF PROGRESSION USED BY MAN. 135 



suspension of the body, and a more rapid succession of the 

 various movements 



FIG. 36. Notations of the gallop. 1. Left gallop. 2. Right gallop. 



Fig. 36 is the notation of the gallop of children, a mode of 

 progression in which both the feet do not move in the same 

 mauuer. In this figure, Hue 1 represents the left gallop that 

 is, with the left foot always forward. It is seen that the right 

 foot presses on the ground first; then the left falls and touches 

 the ground for a shorter time. 



Then, there occurs a suspension of the body, after which 

 the right foot falls afresh, and so on. The time of the simul- 

 taneous pressure of both feet is measured according to the 

 space by which the shaded rectangle rests on the white one. 



Line 2 is the notation of the ri/jht gallop ; that is to say, 

 when the right foot is always in advance, reaching the ground 

 later than the left. Thus, in the gallop, the body is sometimes 

 in the air, sometimes on one foot, and sometimes supported 

 by two. 



Finally, the notations represented in fig. 37 would be: 

 upper line, a series of jumps on two feet ; lower line, a series 

 of hops on the right foot only. 



Fio. 37. (Upper line), notation of a series of jumps on two feet. (Lower 

 line), nota'ion of hops on light foot. It is seen that there is constancy 

 in the durations of suspension, notwithstanding the variability of the 

 pressures. 



Thk method of representation is less complete than the 



