<div class="description">
Illustration depicting the manipulator component of a dial telegraph. Devised by French watchmaker Louis-François Breguet, the dial telegraph used electric current to rotate the needle around the dial of a receiver, which was divided into 26 slots. The starting position at the top, noted by a cross on both the manipulator and receiver, left room for 25 letters and, at the end of each word, the needle would return to the starting position. Some versions, as in the case of this illustration, omitted the letter W while others omitted the letter J.</div>
1870 – 1900
This file was contributed to Wikimedia Commons by <a href="https://en.wikipedia.org/wiki/en:Science_History_Institute" class="extiw" title="w:en:Science History Institute"><span title="library, museum, and archive in Philadelphia, United States">Science History Institute</span></a> as part of a cooperation project. The donation was facilitated by the <a href="https://en.wikipedia.org/wiki/Digital_Public_Library_of_America" class="extiw" title="w:Digital Public Library of America">Digital Public Library of America</a>, via its partner PA Digital.<span style="text-align:left">
<ul><li><a rel="nofollow" class="external text" href="https://digital.sciencehistory.org/works/vv7o94e">Record in source catalog</a></li>
<li>DPLA identifier: <a rel="nofollow" class="external text" href="https://dp.la/item/b43e036e5af5c79fbd2add21b7ab9b4b">b43e036e5af5c79fbd2add21b7ab9b4b</a></li>
<li>Science History Institute identifier: padig:SHI-vv7o94e</li></ul></span>