Instrument board of the car seen in C/U, the board is turned around to reveal the wiring at the back. Camera zooms in to the coil. Drawing shows the battery connected to the coil, the carburettor and the spark plugs. Animation shows sparking process. Line drawings show how large a battery would have to be if it alone were used to produce a spark. A car with a battery of six cells is indicated just by the running board of a car. Then a 8,000 cell battery is indicated by a grid which completely covers the car. Intertitle reads: "However, thanks to Faraday in 1932, it is possible to use only six cells to induce, in a coil, electricity strong enough for our purpose."
The theory of induction is explained by a graphic animation showing a switch and a simple cell. Spark plug action is animated. A new idea in car mechanics is described - having the secondary wire inside. Drawing shows this in practice. Three types of soft iron core are illustrated. A mechanical "breaker" which interrupts the circuit is illustrated. The cam and condenser are illustrated through graphic animation. C/U on drawing of the carburettor. Drawing of the interior of the carburettor showing different parts. Graphic animation of the spark plugs being ignited. C/U of the coil. Drawing shows the wires attaching various parts of the engines. Drawing of the coil with various parts of it labelled. A spotlight is used to show the location of the distributor. C/U of the distributor. Dissolve shows the inner workings of the distributor. C/U of hand removing the distributor cap and using pointer to show various internal workings.
Drawing of the interior of the distributor and cap with various parts labelled. C/U of the body of the distributor being rotated to change opening rate of contact points. Part of engine is moved to show movement of the distributor. C/U of spark plug igniting as the distributor arm moves.
Note: see record for neg - shots in different order.