MOSTRA TUTTI Astronomy Electricity Fluids Heat Studies Measurement Mechanics Optics ElectricityOscillating device ElectricityPerpetual swing device ElectricityPouillet apparatus for rotating currents ElectricityRheostat ElectricitySparking device ElectricitySparking tube ElectricityTelegraph with dial ElectricityThermoelectric couple ElectricityThermoelectric couple ElectricityThree-way switch ElectricityWollaston battery ElectricityZamboni piles