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BELL SYSTEM TECHNICAL JOURNAL 



The intrinsic inductions are also shown for a magnetizing force of 

 1,500 gauss in Fig. 8. Here we find that the irregularities of the 

 surface in the previous figure have largely disappeared and the surface 

 has become fairly flat. The inductions for the alloys in the neighbor- 

 hood of 34 per cent cobalt and 66 per cent iron have now increased so 

 that they are practically the same as for the 50 per cent composition. 



Fig. 9 — Resistivities, microhm-cm., for annealed alloys. 



The valley in the neighborhood of 30 per cent nickel has largely dis- 

 appeared except for the alloys without cobalt which are much harder 

 to saturate. 



In Fig. 9 a solid diagram has also been constructed for the resistivity 

 of these alloys in the annealed condition. It is interesting to note 

 the high resistivities of some of the nickel-iron alloys — again in the 



