Royalty free illustration

Coulomb's Torsion-Balance, one of the best-known instruments of the electrometer class, in which a vertical insulating rod passing through the cover carries a handle, aand a gilt ball, e, at its ends, vintage line drawing or engraving illustration.

Coulomb's Torsion-Balance, one of the best-known instruments of the electrometer class, in which a vertical insulating rod passing through the cover carries a handle, aand a gilt ball, e, at its ends, vintage line drawing or engraving illustration.