Charles Peirce 's only academic post was the courses on logic he gave at Johns Hopkins from 1879 and 1884 and it was these courses which led Ladd to write a doctoral thesis entitled The Algebra of Logic.
Charles Peirce 's lamang akademiko paskil ay ang mga kurso sa lohika siya ibinigay sa Johns Hopkins mula sa 1879 at 1884 at ito ay mga kursong ito na humantong Ladd upang makapagsulat ng isang doktor ang may karapatan Ang algebra ng Logic.