The Netherlands has a lot of windmills, one of the reasons is because there the climate is very windy. They use them to drain and dry the land. Just about everywhere you look , you will see a windmill. They used to be used for grinding grains such as corn and wheat. The sails on windmills are used to be used to send messages. If the sails were set vertical and horizontal, it meant that the mil was ready to start work. Sails that were set 45 degrees to the ground meant the mil could not work. If the sails were set before 6 and 12 o’clock, it meant