not circle, which is a device fitted on top of the compass difficult to. imagine. In other regions of the Pacific vey of the Pacific Ocean which has been conducted by and provided with sights for observing the bearing of Ocean the errors in some of the previous magnetic observers in the sailing… … variation of the magnetic from the geographi- the most accurate ohservations is to "swing Dip circle and total Ritchie Kelvin Horizontal force ship,", that is, cause it to point in different cal meridian, in their various aspects at as force instrument. compass. instrument. compass. many points as…
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