Because of the water-driven groundwood mill, at time of high water availability, excess groundwood was manufactured for use when the water flow was low.
The use of water power and wheels for water-driven draining engines, bellows, hammers and the introduction of advanced types of furnaces were the craftsmen's response to this problem.
To ensure uniform sunlight the troughs are rotated via a hydraulic water-driven system that needs just 0.5 liters to rotate one of the 1.7 ton structures.
