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123 to 127 of 227 glossary terms
meridian circle: circular scale of degrees which in use is aligned with the meridian.
mining instruments: in this period mining instruments were principally for surveying, adapted for the special conditions of working underground in mines.
nautical circle: generic term for a circular mathematical instrument of use in navigation, but likely to carry a range of mathematical and astronomical scales.
nautical hemisphere: a combination of graduated arcs and circles used for navigational calculations, see article on the nautical hemisphere.
navicula dial: type of altitude dial in the shape of a ship.
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