Cooke and Wheatstone telegraph
... that the Cooke and Wheatstone telegraph , the first electric telegraph to be put into commercial service, was initially rejected in favour of a pneumatic system with whistles?
... that the <b id="mwAu8"><a href="./Cooke_and_Wheatstone_telegraph" id="mwAvA" rel="mw:WikiLink" title="Cooke and Wheatstone telegraph">Cooke and Wheatstone telegraph</a></b> <i id="mwAvE">(pictured)</i>, the first <a class="mw-redirect" href="./Electric_telegraph" id="mwAvI" rel="mw:WikiLink" title="Electric telegraph">electric telegraph</a> to be put into commercial service, was initially rejected in favour of a pneumatic system with whistles?