Editing Anemometer (section)

===Plate anemometers===
These are the first modern anemometers. They consist of a flat plate suspended from the top so that the wind deflects the plate. In 1450, the Italian art architect [[Leon Battista Alberti]] invented the first such mechanical anemometer;<ref>{{cite web |title=Windvanes and anemometers |url=https://brunelleschi.imss.fi.it/itineraries/multimedia/WindvanesAndAnemometers.html|publisher=[[Museo Galileo]] - Istituto e Museo di Storia della Scienza |series=Scientific itineraries in Tuscany}}</ref> in 1663 it was re-invented by Robert Hooke.<ref>{{cite book |contribution=A Method for making a History of the Weather |contributor-first=Robert |contributor-last=Hooke |title=The History of the Royal Society of London |first=Thomas |last=Sprat |author-link=Thomas Sprat |date=1746 |orig-date=1663
 |contribution-url=https://en.wikisource.org/wiki/The_History_of_the_Royal_Society_of_London/Chapter_8}}</ref><ref>{{cite web |title=History of the Meteorological Office  |first=Malcolm |last=Walker |publisher=Cambridge University Press |quote=The habit of making weather observations regularly and systematically was encouraged by the Royal Society, and as early as 1663 Hooke presented to the Society his paper titled 'A method for making a history of the weather' |url=https://assets.cambridge.org/97805218/59851/excerpt/9780521859851_excerpt.htm}}</ref> Later versions of this form consisted of a flat plate, either square or circular, which is kept normal to the wind by a wind vane. The pressure of the wind on its face is balanced by a spring. The compression of the spring determines the actual force which the wind is exerting on the plate, and this is either read off on a suitable gauge, or on a recorder. Instruments of this kind do not respond to light winds, are inaccurate for high wind readings, and are slow at responding to variable winds. Plate anemometers have been used to trigger high wind alarms on bridges.