1 54 THE PRINCIPLES OF MYODYNAMICS. 



weight is applied to d. The dynamometer P is 

 fastened to the screw-eyes at L and a, and the 

 dynamometer W is fastened to the opposite 

 screw-eye d. Pull on the dynamometer W till 

 the angle a c L is a right angle, and the indica- 

 tor of the dynamometer P points to the figure 

 14, then zvill the indicator of the dynamometer W 

 point to \2\ nearly. So that the other rectangu- 

 lar component will be 6i pounds nearly. And 

 P will have a moving component of 124 pounds, 



2 



acting in the direction da. Theoretically I2i-|- 



2 2 2 



6i = 14'. But 14' = 196 ; and 12^ -f- 6i = 



195^^. Theory and experiment very nearly 

 agree in this instance. 



Third. Let e c equal one-sixth L c, and let 

 the angle e c L equal a right angle when the 

 weight is applied to f. The dynamometer P is 

 fastened to the screw-eyes at L and e, and the 

 dynamometer W is fastened to the opposite 

 screw-eye f. Pull on the dynamometer W till 

 the angle e c L is a right angle, and the indica- 

 tor of the dynamometer P points to the figure 



