Some Issues which I m about to attempt to partially fix 1 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 2 My 1861 chem textbook uses the name quadrant electrometer to describe a considerably simpler device than Kelvin invented This device has an index which goes between 0 and 90 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