needle telegraph
... that the needle telegraph built by Carl Friedrich Gauss and Wilhelm Eduard Weber had a needle weighing at least 25 lb (11 kg)?
... that the <b id="mwhA"><a href="./Needle_telegraph" id="mwhQ" rel="mw:WikiLink" title="Needle telegraph">needle telegraph</a></b> built by <a href="./Carl_Friedrich_Gauss" id="mwhg" rel="mw:WikiLink" title="Carl Friedrich Gauss">Carl Friedrich Gauss</a> and <a href="./Wilhelm_Eduard_Weber" id="mwhw" rel="mw:WikiLink" title="Wilhelm Eduard Weber">Wilhelm Eduard Weber</a> had a needle weighing at least <span about="#mwt23" data-mw='{"parts":[{"template":{"target":{"wt":"cvt","href":"./Template:Cvt"},"params":{"1":{"wt":"25"},"2":{"wt":"lb"}},"i":0}}]}' id="mwiA" typeof="mw:Transclusion">25</span><span about="#mwt23" typeof="mw:Entity"> </span><span about="#mwt23">lb (11</span><span about="#mwt23" typeof="mw:Entity"> </span><span about="#mwt23">kg)</span>?