56 THE PRINCIPLES OF MVODYXAMICS. 



angle, the displacing components of the power 

 and weight will antagonize. — iii. After the lever 

 moves from the line where the myodynamic 

 angle is right-angled, the displacing components 

 of the power and weight co-operate. — iv. When 

 the myodynamic triangle is right-angled at the 

 joint, the resisting component of the weight 

 equals the displacing component of the power. 



(3.) In a bony lever of the III order: — i. 

 During the motion of the lever from the most 

 acute myodynamic angle to the right-angled 

 dynamic angle, the displacing components of 

 the power and weight antagonize. — ii. While 

 the lever is moving from the right-angled dy- 

 namic angle to the right-angled myodynamic 

 angle, the displacing components of the power 

 and weight co-operate. — iii. After the lever 

 moves from the line of the right-angled myody- 

 namic angle, the displacing components of the 

 power and weight antagonize. — iv. Again, when 

 the myodynamic triangle is right angled at the 

 joint, the resisting component of the weight 

 equals the displacing component of the power. 



41. When the myodynamic triangle is right- 



