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The newe attractiue, containyng a short discourse of the magnes or lodestone, and amongst other his vertues, of a newe discouered secret and subtill propertie, concernyng the declinyng of the needle, touched therewith vnder the plaine of the horizon. Now first founde out by Robert Norman. Herevnto
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between the needle and its pivot and encasing the circle in glass. Between the late 18th century and late 19th century the design approached its peak. Improvements which made the dip circle a practical aid for polar navigation were made by
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FRS, who developed in the 1830s the first dip circle that could be used on board a moving ship. Another important improvement to the instrument was developed in the 1830s by the
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Early dip circles were not accurate and gave poor results. Over the next 300 years many improvements were made, including reducing the
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the most advanced dip circles were being made. With the development of electronic systems dip circles became obsolete.
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around 1576 investigated dip angle further and in 1581 described in print a device to measure this phenomenon.
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are annexed certaine necessarie rules for the art of nauigation, by the same R. N.
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Instrument used for surveying, prospecting and demonstrating geomagnetism
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first discovered dip angle in 1544, when he noticed the needle on a
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A dip circle by P. Gruber, Vienna, from before 1900
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