Ingen-Hausz Thermal Conductivity Apparatus Rod Material_Stainless Steel and ring magnets with plotting

and ring magnets with plotting compasses

producing oxygen's characteristic emission lines for spectroscope viewing of atomic-emission and quantum-energy levels

Polished non-warping wooden base with a built-in meter-scale carries a compass-box magnetometer

Reproduces Ewald von Kleist's 1745 charge-storage device with concentric metal cups around a plastic dielectric

Ingen-Hausz Thermal Conductivity Apparatus Rod Material_Stainless Steel and ring magnets with plottingAluminum, brass, copper, lead, and iron rods at 150 by 3mm mounted along a hot water tank, tracking each metal's conductivity by the rate wax coatings melt from the heated end.