Pivot and Two Compass Cards, Kleman & Zoon, after George Stebbing, 1825 compass Compass with ruby point on a wooden pedestal, with rose. The rose has a brass cap in the middle with hole in front of the pen at the bottom: the rotation of the rose was improved by the materials used, while fluctuating by increasing the ruby's friction surface was reduced. The rose, which is badly damaged, can be turned within an outer edge, on which a bowl is applied in degrees per quadrant; This was to compensate for the magnetic variation (the angle between the actual north and the magnetic north). The sec
Pivot and Two Compass Cards, Kleman & Zoon, after George Stebbing, 1825 compass Compass with ruby point on a wooden pedestal, with rose. The rose has a brass cap in the middle with hole in front of the pen at the bottom: the rotation of the rose was improved by the materials used, while fluctuating by increasing the ruby's friction surface was reduced. The rose, which is badly damaged, can be turned within an outer edge, on which a bowl is applied in degrees per quadrant; This was to compensate for the magnetic variation (the angle between the actual north and the magnetic north). The second rose is of the same type, but the cap is equipped with a gem, presumably agate. With two compass roses. instrument maker: Amsterdamafter design by: Portsmouth wood (plant material). brass (alloy). iron (metal). ruby (mineral). agate (chalcedony). paper
Size: 6400px × 4104px
Photo credit: © piemags/rmn / Alamy / Afripics
License: Licensed
Model Released: No
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