St. John, Thomas M. (Thomas Matthew), b. 1865 · New York, T. M. St. John · leaf 89
ade when the armature springs back again. The time between the two clicks can be short or long, to represent dots or dashes,which, together with spaces,represent letters. (ForTelegraph Alphabet andcomplete diredlions forhome-made keys, sounders,etc., .see ApparatusBook, Chapter XIV.) Fig. 109 shows… … ?ig. 109.
Electricity
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![An illustration from The Telegrapher [microform] (1864)](https://img.insideoutlibrary.com/img/200/ia-telegrapher04nati-313-141.webp)
