An encyclopedia or encyclopaedia is a collection (usually a book) of information.Some are called "encyclopedic dictionaries". All encyclopedias were printed, until the late 20th century when some were on CDs and the Internet. 21st century encyclopedias are mostly online by Internet.
The Beaufort scale is a scale for measuring wind speeds. It is based on observation rather than accurate measurement. It is the most widely used system to measure wind speed today. The scale was developed in 1805 by Francis Beaufort, an officer of the Royal Navy and first officially used by HMS Beagle. There are twelve levels, plus 0 for "no wind".
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