Is there a good (or even mediocre) published expository account of Benjamin Franklin's work on electricity?
From what I have read and heard, it appears that
Franklin may have been the first to ascertain that lightning is an instance of the same force of nature seen in electrical phenomena observed in commonplace circumstances;
Franklin invented the lightning conductor, which protects buildings from burning down when struck by lightning;
Franklin was the first to call certain electric charges "positive" and others "negative", and his choice of which is which has persisted despite later being found to be less felicitous than if he had made the opposite choice;
Franklin invented the battery.
A good expository account would make that list more complete and would say how Franklin's work fit in with the work of others before and during Franklin's life, and perhaps how later researchers relied upon Franklin's work.