Have you ever seen Maxwell's original publication on this, a reprint of course? It is kind of odd, like reading Galileo's research papers. You have to be in a mood very different from the modern attitude.
I think I read it once,..while studying Paris & Hurd, also original research into the founding papers regarding Leibnitz's Integral calculus. I've always found it interesting to go back and read cpmpetitive theories and methods used at the time these more popular mathematical methods were established. it helps to discern the implicit assumptions made and objects of the logic used in their original constraints.