Arrow Wind Vane
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“The horizontal direction of the wind is usually observed by means of an instrument called the arrow wind vane, the head of the arrow pointing in the direction of approach of the wind. The arrow is free to revolve horizontally around a vertical axis placed near the head.” -Waldo, 1896
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MeteorologySource
Frank Waldo Elementary Meteorology (New York, NY: American Book Company, 1896)
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