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BELL SYSTEM TECHNICAL JOURNAL 



Stances reveals a clue to the causes producing early failure and thus 

 suggests methods by which the failures may be eliminated. 



In developing new alloys such as have been described and in studying 

 the causes of failure of these alloys in service, extensive laboratory 

 facilities are required. For example, the Bell Telephone Laboratories 

 possess an extrusion press, shown in Fig. 3, for experimental studies 



Fig. 3 — Laboratory extrusion press for the study of the extrusion process and for the 

 production of experimental cable sheathing alloys. 



I 



