Today I finally corrected a gross error in the image of the golden leaf electroscope on the wikipedia page. Curiously the image stayed almost 20 years unaltered on wikipedia. This is high school experimental setup.
A golden leaf electroscope can only show repulsion between negative charges, never between positive charges.
My comment on the incorrect image:
https://commons.wikimedia.org/wiki/File_talk:Gold_Leaf_Electroscope.png#c-Arjen_Dijksman-20260923083600-Sign_of_charges_on_the_rod
