Windmills: What are they used for? What do they do ...
The first windmill to appear in Europe was the post mill with a horizontal axis system, with a fourbladed mill attached to a central post. Mostert's Mill describes the post mill as a building balanced and pivoted on a vertical central post kept upright by crosstrees and angled quarter bars, whose ends carried four upright stone or brick pillars. The mill consisted of a wallower, a large ...