Smithsonian Report. 1937. — Adams 



Plate 1 



Showing the •bomb' at the Geophysical Laboratory of Carnegie 



Institution. 



This "bomb" consists of a cylinder of special steel, 6 inches in diameter and 14 inches high. It is solid 

 except for a tubular hole, 5s of an inch in diameter and about 10 inches long, which is fitted with a leak- 

 proof piston through movement of which a pressure equivalent to 240,000 pounds to the square inch can 

 be obtained. This apparatus was devised for investigating the behavior of rocks and solutions under 

 extreme pressures comparable to those that prevail at great depths in the earth. 



