Pressure 

 Ibsjscjjnch 



3200 



3" Seamk'ess Cold Drawn Steel Tube. 



P-L Curves 



.2800 



\ 



Phil. Mag. Ser. 6, Vol. 32, PL XIV. 



Fig. 4. 



Curve I t/c -0245 



•• n " -0225 



" IE " -01 90. 



., x^ " '0150 



» V " '0100 



