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BELL SYSTEM TECHNICAL JOURNAL 



This paper, however, would be incomplete without mention of some 

 of the remarkable magnetic properties obtained in laboratory samples. 

 In table III some of these magnetic achievements are tabulated. The 

 special treatments given these specimens are noted also in this table. 



TABLE III 

 Some Remarkable Magnetic Properties Obtained in Laboratory Specimens * 



For explanation of symbols in headings see footnote to table II. 



* Except as noted, the values in this table have not previously been published. 



Engineering Applications 



One of the first uses of the permalloys was for continuous loading of a 

 telegraph cable between New York and the Azores laid in 1924. For 

 this project 78.5 permalloy was used in the form of a 0.125 by 0.006 

 inch tape wrapped helically on a stranded copper conductor. The 

 average initial permeability of this alloy in the laid cable was 2,300, 



