This item explores properties of light.
Various drawings of mountains and palm trees in prehistoric times. M/S diagram of Pithecanthropus, or Java ape-man. M/S of actor (Joe Noble ?) dressed up as the ape-man looking very pleased as he watches a fire. M/S of trees on fire. M/S of sticks rubbed together to make fire. Various shots of diagrams showing lights and lamps through the ages. A diagram shows how we see light and colours, and spectroscope with prism shows spectrum of colours and light. Men set up a telescope outside. M/S of a diagram of a house with a light on, someone shouts to turn it out and the moon behind goes out too.