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BELL SYSTEM TECHNICAL JOURNAL 



Fig. 2 shows the twisting machines used at that time for twisting 

 pairs. These machines were crude and operated at a low speed. 



Fig. 1 — Old insulating department about 1892 



Fig. 2 — Old twisting department about 1890 



Fig. 3 is of an old stranding machine consisting of one drum only as 

 the cable cores were built up one layer at a time and the core was run 



