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  ABDNP201862a01.JPG - Traditional Raingauge We don't know the detailed appearance of Patrick Copland's 'pluviameter' in the late 18th century but it is likely to have been a copper funnel leading into a cylindrical tube whose contents were measured once a day in a graduated glass measure.  Not much changed in the following two centuries up until the regular use of the tipping bucket raingauge and other electronic developments. Standardisation is particularly important in meteorology where one wishes to compare today's readings with those of decades or centuries ago.  Funnel collectors are subject to loosing rain that splashes out and gaining rain that splashes in from the surroundings.  These effects vary with the width of the funnel, its height above the surroundings, the prevailing wind and other variables.  Hence standardisation is essential and 'old technology' survives long past the time it could be superseded. ABDNP:201862a  
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20 | Traditional Raingauge

We don't know the detailed appearance of Patrick Copland's 'pluviameter' in the late 18th century but it is likely to have been a copper funnel leading into a cylindrical tube whose contents were measured once a day in a graduated glass measure. Not much changed in the following two centuries up until the regular use of the tipping bucket raingauge and other electronic developments.

Standardisation is particularly important in meteorology where one wishes to compare today's readings with those of decades or centuries ago. Funnel collectors are subject to loosing rain that splashes out and gaining rain that splashes in from the surroundings. These effects vary with the width of the funnel, its height above the surroundings, the prevailing wind and other variables. Hence standardisation is essential and 'old technology' survives long past the time it could be superseded.

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