Ml 



lihrium it- < ifcontnl plane. 



name will aUo be the case if the cord rent upon any 



smooth 



i elastic i a cjcloidal arc, the plane 



id vertex upwards, and when tn 

 whole of the cy< 



Modulus of c last i it of a portion of the 



; whose natural ! -jene- 



rating circle; find the natural length < ng. 



Ilrsult. It is equal to the circumference of the generating 



