Smithsonian Report, 1918. — Bridgman. 



PLATE I, 



TCP™ 





Fig. I. — One of the Halves of a Cylinder of Tool Steel Split by the 

 Application of Internal Pressure. 



The inner hole has stretched from J inch to If inches. The maximum pressure withstood by this 

 cylinder was 30,000 atmospheres. 



Fig. 2. — Cross Section of a Cylinder of Bessemer Steel Ruptured by 

 the Application of Internal Pressure. 



This cylinder was originally 2 inches outside and J inch inside diameter. The inner hole has been 



stretched to"l-| inches. 



Fig. 3. — View of the Outside of the Cylinder Shown in Fig. 2, Taken 

 Before the Section was Made. 



