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The Rose of the Winds: The Origin and Development of the Compass-Card

By Silvanus Phillips Thompson
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By Silvanus Phillips Thompson
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ALTHOUGH the construction of the compass lies outside the scope of this inquiry, some preliminary considerations are necessary concerning the origin of the compass itself; and these must be stated briefly. The mariners' compass, as we know it to-day, consists of a light circular disk or card, beneath which is attached a magnetic needle or system of magnetic needles. The card is provided at its center with a small cap, by which it is poised movable upon a pin. The whole is enclosed in a holl...

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