

SYSTEM OF rn.: 



II. suppose the weigh ts of the jnillies to b 



d; and let a> l9 w a , o> a ,...a> w be these weights. . 



bta which 



and /; the w.-i-ht which JT woul 

 7', v, 



,, ir 



on- 



w 

 would sustain at 



o > 





2" ' 



fore 



or 



If 0)j = C0 t = 0) 3 



1 



101. To /;?rZ ^e ratio of tJie power and Wf ' ,i 



a is the same as in the last Proposition, but the 

 are not parulL /. 



We shall neglect the weights of the blocks. The 

 will evidently so adjust themselves that the string at the 

 centre of any pully will l>isect the angle between the St. 

 touching its circumference. 



Let 2a,, 2a s , 2a s ,...2o m be the angles included between 



UK. 



the strings touching the first, second, third, 7i lh pullies 



respectively. 



