SPECTROCHEMICAL A NALYSIS 



385 



AT FRACTURE 

 [FLEXIBLE PORTION 



Fig. 1 — Field complaint on failure of zinc straps for supporting aerial cables. 



Fig. 2 — Identification of contact alloys. 



7oSi02 

 I 0.25 



Fig. 3 — Silica in beryllium oxide and aluminum oxide. 



