Phil. Mag. Ser. 6, Vol. 24, PI. II. 



b3« 

 ■1 



n 



Cross section of a cylinder of Bessemer steel 

 ruptured by the application of internal pressure. 

 This cylinder was originally '2 in. outside and 

 i in. inside diameter. The inner hole has been 

 stretched to If in. 



Photograph of a " pincbed-off" specimen, ruptured 

 in the apparatus of Fig. 1. 



One of the halves of a cylinder of Bessemer steel 

 (originally 4 in, in external diameter) ruptured 

 by the application of internal pressure. The 

 inner hole has stretched from i in. to If in. 



Cross section of a copper cylinder burst by the 

 application of internal pressure. The inner hole 

 has been stretched from ^ in. to # in. 



Longitudinal section of a cylinder of lead burst by 

 the application of internal pressure. The 

 elongation at the outside at the locality ol 

 rupture is over 30U per cent. 



One 'of the halve? of a cvliud.-r "I to.il steel split by the 



application of internal pressure. The inner hole 



. . has stretched from -J in. to lj in. The maximum 



pressure withstood by this cyhader was 30,000 



atmos. 



