THE FORE EXTREMITY. 67 



'" "" and 



because they are on the same base, a h 

 between the same parallels a h'\ a" V" . 



It will be seen that a rhythm is begun when the 

 foot is on the ground, as at h"\ and completed when 



FIG 9. 



the foot reaches the ground, as at a'\ and the limb has 

 gained the same relation to the body, (represented 

 by the arrow,) as at a a" Take the parallelogram 

 a' a" b'" a"\ then it will be seen that the leg is flexed 

 and extended within the triangle a" a" h"\ and that 

 the body swings forward and brings the leg from posi- 

 tion a" a" to a a"\ and this movement is accom- 

 plished within the triangle a a" a". Tt is needless 

 to remind the reader that in the walk one fore foot 

 is on the ground when the other is oif it, therefore 

 the fellow leg is bearing the body's weight whilst 

 the foot is being put from h'" to a'\ 



f2 



