This was his first work on the topic that would play a major role in his research over the next few years and it was based on the work of Schröder, Boole and Charles Peirce .
Ito ay kanyang unang trabaho sa topic na play ng isang malaking papel sa kanyang mga pananaliksik sa susunod na ilang taon na at ito ay batay sa mga gawain ng Schröder, Boole at Charles Peirce.