I1: Jacob's Ladder, Resistance
nails, Copper and
aluminum tubes, Resistor
boxes, Large resistors,
Batteries, Circuit parts
I2: Caste iron capacitor
plates, Lightweight
capacitor plates, Attracting
capacitor plates, RC circuit,
Adjustable capacitors,
Series capacitors
I3: Galvenometers,
Voltmeters, Ammeters,
Multimeters
I4: Solenoids, Transistors