In 1846, John Thomas Romney Robinson, an Irish physicist, invented the anemometer. The anemometer is an instrument that measures wind speed. Usually made out of some cups, a shaft, and a box, the box is to gather the information. The purple represents the cups and they are connected to the spokes that are red. The spokes are then connected to the shaft that are black. The cups and spokes then rotates freely when the wind blows. When the wind blow it goes into the opening of the cups and rotates the spokes. When the wind blows the cups and the spokes move the way the wind is blowing. This is because the cup openings are opposite so that the cups will rotate and not stay in one place. This measures in miles per hour, meters per second, kilometers per second, or knots.

Picture drawn by Jenna Rigel