LAWS OF BONE ARCHITECTURE 



203 



TABLE 1 



axis A-A was found to be 0.14375 inches^. The error by the 



graphical method is 0.00025, or one part in 576. For axis B-B 



1.2(1)^ 

 similarly, / = -^—r — = 0.1000: the value of / by the graphi- 



cal method is 0.09975. The error by the graphical method is 

 0.00025, or one part in 400. These slight errors are far inside the 

 permissible error for mechanical design. 



49. Columns. Long slender columns tend to bend at the 

 weakest cross section. If a column is rigidly braced against 

 side movement at intervals along its length, its strength is 

 greatly increased, because of the increase in stiffness, and the 

 effect of such bracing is to make it in effect a series of short 

 columns. 



