46 THE HUMAN BODY. 



therefore rightly considered a beauty; it makes the gait 

 easier and more graceful. 



bears on the middle of the upper. When the wheel jolts over a stone the jerk is 

 transmitted to the elastic arches, which each flatten a little, and so instead of a sud- 

 den jerk a gentle sway is transmitted to the carriage. The tarsal arch of the hu- 

 man foot acts like the upper half of a carriage spring. 



