Barographs

The "Recording Barometer" or Barograph was first commercially produced, albeit in very small numbers, in the 1870s, harnessing the movement of mercury in a standard Torricellian column of mercury.

It was not until the 1880s that the Aneroid mechanism became powerful enough to enable the data to be recorded, initially, in the main, in the form of Weather Stations in public buildings.

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Please note that the 2009 EU Mercury regulations DO NOT affect antique barometers in any way.
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