A French farmer converts manure to methane gas which powers lights and turbines.
Item title reads - Countryman's brain wave.
Various shots as farmers use pitchforks to load manure into big tanks, the lid is put on and a diagram shows how it is converted to methane gas. A man turns the gas tap on and lights the gas under a cover to make a lamp. A woman uses it to cook with on her stove. Also used for turbines.