How do we know that was a bug, not just a typo? I mean, it could have been the printer that got it wrong, couldn't it? Subscribe to Space Mog . Toby made this a few years ago: How Ada Lovelace learned Maths See Sketch of The Analytical Engine Invented by Charles Babbage at https://www.fourmilab.ch/ For more about Switzerland, see Sabine Hossenfelder - Superconducting Cables are Coming. I’m Not Joking. and Les Hirondelles and also Demonstrations in Switzerland in the Sixties and Seventies . Subscribe to Tibees . My graphics display needs a lot more work! What a strange process, this computer programming thing! See Wisteria , Myra West's Hello, World Program and Sci-Fi Short - Speak Only Good of The Dead , which is a story about a computer named EPICAC! Subscribe to Dust .