These small instruments were kept in a case and always accurately lubricated. They were always used along with a small 15 or 20-second glass.
The needle was set to 0 and then the device was placed facing the wind for the duration of a glass. The dial was graduated both in m/s, and in degrees from 1 to 10 or 12 Beaufort degrees.
The Richard anemometer had a rotor, a revolution counter, and a seconds counter all in one single piece.
After 100 seconds of wind exposure, the instrument would display the wind speed in m/s.