244 



represents, when the scale is altered, the load q„; in this case 1 cm. 



t 15000 kg. 



I must be interpreted as — — — = 5 kg/cm (say m, kg/cm). 



On this scale the parabolic load q has been drawn in fig. la, 

 so that the load q — q^, — which determines the elastic curve y, — 

 is represented in fig. la by the hatched area. 



In the well-known manner the elastic curve y,, which corresponds 

 to the load q — </,, is constructed (see figures 16 and Ic with the 

 corresponding pole figures 1 and 2). 



To determine the situation of the pole in the second pole figure, 

 we make the following remarks. 



In figure la 1 cm. •* — >• represents n cm. •« — »-;lcm. I represents 



??i, kg/cm. Therefore 1 cm' of fig. la represents »im, kg. 



Assuming now that in the first pole figure 1 cm. (whether < — ► 



or !) will represent ?»., cm' of figure la (in the drawing ??i, is 



supposed to be 5) and that the first pole distance has a length of 

 iZ, cm (in the drawing 10 cm), we see that H^ represents m,m,nHi kg. 



Hence 1 cm. I in fig. lb represents itiiin^n'H^ kg. cm. Consequently 



