J1: Electroscopes, Induction
shape, Shape of Charge, Inside
outside sphere of charge
J2: Leyden Jars, Floating foil,
Static pinwheel, Pith balls
J3: Electrophoruses, Foam, Wool,
Rabbit fur, Statics fun stick,
foil strips
J4: Glass rods, Aluminum rods,
Teflon rods, Spark gap
J5: Wimhurst Machine, Rheostats