78 



During these movements, not only do the fore- 

 limbs, after moving with the body, finally settle 

 into position with entire reference to the head, but 

 the lower jmv, experiencing similar effects from 

 the movements of the body, as conveyed to it 

 through the lungs, finally clinches the whole by its 

 reaction on the head. 



From this condition of " qatJiering,'' in which 

 the elements of motion have, so to speak, their 

 orthographic projection on the base of the skull, 

 the head, by the slightest positive or relative 

 change in its bearings on the spine, may initiate, 

 and by again changing these bearings, may com- 

 plete any movement. 



It is in this sense that we may consider the head 

 to be the governor of all perfect motion. In de- 

 formed movement there is a failure of straight 

 connection with the head at certain points, and 

 this default of such connection must be made up 

 for by extra and eccentric movements, which de- 

 stroy the steadiness of the body. 



§ 81. The hmder space, bare of ribs (the loins) 

 carries, at its extreme end, a hollow but solid 

 framework of bones called the pelvis. This con- 

 sists of the two hip-bones, immovably joined to- 

 gether in front by the meeting of two bones called 



