A 19th-century Cuthbentson-pattern electrostatic plate machine, the mahogany frame with ivorine plate inscribed NEWTON & CO OPTICIANS 3 FLEET STREET LONDON, the 16in. (40.7cm.) diam. plate with lacquered-brass axis, friction pads and retangular base, the conductor combs with glass insulator, with a 'lightening stool', Leyden jars a prism on stand a series of bells and other accessories and trade label, in ebonised pine case 20½ (52.1cm.) wide