In the study of electrical engineering circuit diagrams it is usually the norm to show the + ( positive ) polarity as the direction of motion. However in reality the electron is the elementary particle that is actually moving so the diagram is actually in reverse. After some research the only explanation I can find on the internet is that when Benjamin Franklin first conceived of a positive and negative aspect and he just guessed at direction and got it wrong and engineers have been reluctant to undo all the legacy diagrams. I don't know if I believe this story. I don't see how someone can guess the "wrong" direction since Franklin did not know about the electron. Wouldn't the better question be why didn't J.J Thompson name the electron to be + since that was the direction of motion in all circuit diagrams? Obviously I am in error somewhere but need help sorting the historical details.