Spherical Conductor, 8cm Diameter Subcategory_Sound and Resonance set in motion by ion

set in motion by ion wind from corona discharge whenever the apparatus is connected to a high-voltage source

configured to make and break a circuit at the rhythm of a Morse-code transmission for telegraph-history demonstrations

Flame stabilizer paired with an anti-tip cast iron base on this natural gas Bunsen burner

Rectangular casted metal case and polythene insulated lid with finger flap to facilitate removal & front glass window

Spherical Conductor, 8cm Diameter Subcategory_Sound and Resonance set in motion by ionPolished 8cm brass sphere on an ebonite insulated metal base, sized to retain induced charge through demonstrations of Coulomb's law and surface charge distribution.