From AMS Glossary
A recording barometer.
Barographs may be classified, on the basis of their construction, into the following types: 1) aneroid barograph (including microbarograph); 2) float barograph; 3) photographic barograph; and 4) weight barograph. The aneroid barograph is the one most commonly used in weather stations.
U.S. Weather Bureau 1941. Barometers and the Measurement of Atmospheric Pressure. Circular F, 7th ed., rev., . 28–44.