APPLICATION OF GRAPHIC METHODS 335 



to/ and to the four loads. (6) The several loads were referred 

 to the joints. (7) Polygons of force were drawn for each point r 

 and by these polygons the inclinations of 2yS, 3/3, 4yS, and 

 5$, Fig. 40, were found, the intersections of. these lines with 



the loads (including e and/) gave the eight angles of the polygon-. 

 (8) The reciprocal figure, Fig. 40tT, was drawn, by which the 

 work was checked, and the inclinations of the sides of the polygon- 

 Aerified. 



