lowest load a similar curvature exists (see fig. 2), and although all the 

 readings were carefully checked, the result was practically the same.* 

 In Numbers 2, 3, and 4, however, the line is straight, whilst in Number 5 

 there is a pronounced curvature in the opposite direction. 



* It has been suggested that this unexpected curvature might be accounted for 

 by additional strains due to the comparative smallness of the distance from the 

 loaded part. 



C 2 



