Scientific and electrical apparatus and instruments including switchboards, control panels, data indicating apparatus, data processing apparatus, flow line indicating apparatus, and parts thereof, electrical switching and metering panels and apparatus associated therewith, and telemetering apparatus, advertising apparatus (both machanical and luminous) electrical cables, electrical circuit breakers and closers, electrical connectors and connections, counting apparatus; electric chokes, capacitors, rectifiers, transformers, fuses, gauges, governors, indicators, lamps; magnets, twinkling luminous apparatus, make and break switches, meters regulators, resistances, relays, rheostats, and switches,