What are weathervanes, and why are they placed in prominent positions ?

A weathervane is a thin plate of metal or wood cut into the form of an arrow or some fanciful device. I t is mounted on a vertical rod, and responds freely by rotation to the force of the wind. It is usually made to point in the direction from which the wind blows.

Weather-vanes are placed in prominent positions : (a) in order that they may catch the force of the wind,
however gentle it may be ; (b) in order that they may readily be seen.

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