r.iRDS. 49.'J 



resting on its legs, the centre of gravity mnst, in 

 like manner, be brought immediately over the base 



of support formed by the toes : it becomes neces- 

 sary, therefore, to provide means for shifting the 

 centre of gravity from one place to another, accord- 

 ing to circumstances, and to adjust its position 

 with considerable nicety ; otherwise there would be 

 danger of the equilibrium being destroyed, and the 

 body oversetting. The principal means of effecting 

 these adjustments consist in the motions of the 

 head and neck ; which last is, for that purpose, 



