Post #3329670

@mgorny@social.treehouse.systems @mwichary@mastodon.online The earliest commercially successful telegraph technology required four cables to move needles on a letter-matrix A more advanced circular alphabetical button board required even less decoding training Both fell to the less-copper-demanding but skill-restricted Morse code https://en.wikipedia.org/wiki/Cooke_and_Wheatstone_telegraph #Telegraph Backer Charles Wheatstone also invented the English #concertina, measured the speed of light, developed 3-D glasses, and has a Bridge to sell you #accordion ❤️‍🔥🪗