George Boole never wired such a circuit. He never had the thrill of seeing a Boolean expression realized in switches, wires, and lightbulbs. One obstacle, of course, was that the incandescent lightbulb wasn’t invented until 15 years after Boole’s death. But the telegraph had been invented ten years before the publication of Boole’s The Laws of Thought, and an important part of the telegraph system was a simple device that could perform operations of logic with much more agility than mere switches could.
Boolean Algebra
