20 Foster, Phenomena due to Repetitions of Stress. 



(9) The specimen can be enclosed in a temperature 

 bath so that the effects of varying temperatures 

 may be observed. 

 (10) The whole machine is very small and compact. 

 Thus, with steam at 200 pounds per square inch, 

 and a specimen a quarter of an inch in diameter, 

 a five inch cylinder will enable stresses of 36 

 tons per square inch to be obtained. 



