some issues which i'm about to attempt to partially fix the gold leaf 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 kelvin's device while i don't 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 e g gold leaf dellmann peltier bohnenberger i will rename quadrant electrometer to kelvin's quadrant electrometer and then put both his and the simpler one under repulsion electrometers hopefully we can make this article clearer and neater