Men harness the power of thermal activity.
"In many parts of the world volcanic power and heat lies waiting to be utilised by man..." L/S of group of men walking past a steam jet which is coming out of a rock face. C/U of a small stream that has steam rising from it. The men drop their hats over a jet of steam and they hover over it for a few seconds. M/S of a man stoking one of the holes from which steam is rising.
"The engineers predict enough high-pressure steam to generate a million horsepower through man-made safety valves..." L/S of a valve through which steam emerges. A man holds his jacket in the steam and then lets go, the force of the steam sends it flying through the air. He drops various things in the path of the steam and they all fly away. He holds a plank of wood - which he possibly is about to let go but film ends before we can see it.
Was an item in Eve's Film Review issue number 607.