60.04 Deflect electron beam with magnetic field of coil (also listed as 68.34 -- cathode ray tube, coil, under Magnetism)
60.06 Jacob’s ladder
60.09 Potential line mapping
Capacitance
60.12 Separating charged parallel plates
60.15 Variable capacitor to capacitance meter
60.16 Capacitors in series and parallel (also listed as 64.48 under “ Electric Currents and DC Circuits”)
60.17 Theremin
60.18 Leyden jar
60.21 Capacitor spark
A video of this demonstration is available (a link is on its page).