Clinometer

Clinometer, an instrument for the purpose of taking the amount of dip or angle of inclination of a stratum. There are various kinds in use, but the simplest consists of a strip of wood upon which is mounted a graduated arc with a pendulum. When this instrument is held horizontally, the pendulum points to zero; when it is held in a slanting position, the pendulum shows the number of degrees that the upper edge or the base of the strip deviates from horizontality. The most useful form of clinometer is that which is combined with a compass—both these instruments being required in geological observations.