A K ( 



fill tbp arrh had room ;> la I] ; it is 1h'rriore ;iirnins1 the ma.-onry imm*. 

 diately In-hind the ]art A M, and rhieily in a horizontal direction, that 

 th. force J> exerted. 



ARCHIMEDES' -S>//Y//. See 5/>m/. 



ARCS Circular to fin J JengtJi of, in terms of the radius. ( Vince.) 



TABLE, 



For finding fhf IcngtJt of Circular Arcs to Radius Unity. 



Circular arc r^ radius 57. 2957795 57<>. 17'. 44", 8. 



E^. What is the length of a circular arc of 37". 42'. 58" ? 



300 0-5235988 



70 0-1221730 



40 0-0116355 



2' 0-0005818 



50" 0-0002424 



8" 0-0000388 



Lecgth required 



0-6582703 



