1200 



800 



Phil. Mag. Ser. 6, Vol. 28. PI. I. 



Fig. 6. 



?t/o/t between Co/ta/is'no 7°ressura 

 for tuAes 3 /n. /nfe ma/ c/rome/fr 

 thickness. 



.lefto'Currc, 





(2) assuming Zj - 6c7 (CormanJ 

 (2) y QSSurn,~ 9 Z = y^ 3 (SoutAwe//) 



Fio. 



\on between Co/fapS/ng Pressure 

 —\ — t>r tubes 3 /n interna/ diameter 

 V thickness Rafro ± 



■0097 

 V/fnenTct/ Curve. 



".quafion (2) cxSSum/rrj Zi = 6c{ (Corman) 

 'quot/on (2.) assu/l/no L = J<^P (South rre/t) 

 k - I 73. 



