Instructions for testing telegraph lines and the technical arrangements of offices (1878)
Schwendler, Louis, 1838-1882 · London : Trèubner · leaf 58
should fit well and bite tightly. See Fig. 2. BATTERIES. 43 The insulating covering of the wire is to be removedfrom the one end for about 2^ inches, and from the otherend for about 1 inch. The 2^ inches of bare copper wireare to be then cleaned and slipped through the threeholes in the copper… … plate must be well hammered to secure a perfect contactbetween the copper disc and the wire. Soldering thewire to the copper plate is strict]y prohibited. Further,the other (1 inch) end of the wire must be also cleaned,and then neatly turned with a pair of pliers into an eyeto fit the bindincf…
Telegraph · Telegraph lines
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