Humphry Davy demonstrated the first incandescent light to the Royal Institute in Great Britain, using a bank ⚾️ of batteries and two charcoal rods. Arc lamps provided many cities with their first electric streetlights.
Modern pub fruit machines are computerised but the basic gameplay is the same as ever. Put the 💶 correct amount of money in the coin slot and press the Start button (or pull the lever on an old-style 💶 one-armed bandit) to spin the reels.