National Telegraphic Union · New York : N.T.U. · leaf 208
To Test for an Escape.—Call the stations up in ro-tation, beginning with the one farthest off, and have themopen key for a minute or two. When a station beyondthe escape is open, more or less current will still pass outto the line through the relay, returning through theground from the fault.…
Telegraph
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![An illustration from The Telegrapher [microform], 1864, leaf 208](https://img.insideoutlibrary.com/img/1024/ia-telegrapher05nati-208-138.webp)
