Alexander Cumming, a watchmaker and mechanic, has a claim to having made the first effective recording … See more

Today, traditional recording barographs for meteorological use have commonly been superseded (though not all) by electronic weather instruments that use computer methods to record the barometric pressure. These are … See more

As atmospheric pressure responds in a predictable manner to changes in altitude, barographs may be used to record elevation changes during an aircraft flight. Barographs were required by the FAI to record cert… See more

On the top right of the picture of the three-day barograph can be seen a silver knurled knob. This is to adjust the barograph so that it correctly reflects the station pressure. Barely visible below the knob is a small silver plung… See more

• Thermo-hygrograph See more