Some Issues which Im about to attempt to partially fix    The goldleaf and quadrant electrometers are in a sense also repulsion electrometers they both work by measuring the repulsion of the same charge in one way or another   My  chem textbook uses the name quadrant electrometer to describe a considerably simpler device than Kelvin invented This device has an index which goes between  and  degrees hence a quadrant while Kelvins device while I dont fully understand it had a drum split into quadrants So I conclude that this is a coincidence   The best solution I can think of is to create a section of repulsion electrometers and then describe the types individually in their own sections underneath eg goldleaf Dellmann Peltier Bohnenberger I will rename quadrant electrometer to Kelvins quadrant electrometer and then put both his and the simpler one under repulsion electrometers  Hopefully we can make this article clearer and neater