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There is no information regarding the power source used for sending and receiving telegraphs. As the first power station was built in 1882 (Cooke and Wheatstone's telegram was invented in 1837) there was no electrical grid to connect the telegram to. Without explaining how the telegraph functioned this article is seriously lacking. —Preceding unsigned comment added by Iranian86Footballer (talk • contribs) 20:29, 13 August 2010 (UTC)
On first pass, this looks quite solid and ripe for promotion. I only have one small issue I've seen so far (below), but note that I've also done some minor copyediting as I went, and in one case, moved an image. If you disagree with any of my tweaks, please feel free to revert.
"The number of codes that can be obtained from 2, 3, 4, 5, 6 ... needles is 2, 6, 12, 20, 30 ...  respectively." -- I'm confused by the external link in this sentence. Is this meant to be a reference? It also appears to be a dead link.
It is a link to the integer sequence, it's not dead, it was just malformed. I've now formatted it as a ref and used the OEIS template. It is part ref and part further information for more terms in the sequence. By the way, it was not me who nominated the article for GA, while I am happy to provide information, I think the nominator should take the lead in dealing with GA issues/comments. SpinningSpark 21:39, 7 March 2013 (UTC)
Thanks--as it happens, that was all I needed, so we're all set. -- Khazar2 (talk) 00:34, 8 March 2013 (UTC)
Question: Why do the letters I and E in the 5 needle system have three inclined needles and not just two? Is the image correct? — Preceding unsigned comment added by 126.96.36.199 (talk) 11:05, 26 October 2013 (UTC)
They are errors, probably from copy and paste of one code to the next. Thanks for spotting that, it should be fixed now. SpinningSpark 13:15, 26 October 2013 (UTC)