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22 to 26 of 227 glossary terms
Butterfield dial: type of sundial adjustable for latitude, whose gnomon incorporates a latitude pointer often in the form of a bird. This dial type is associated with the 17th-century Paris-based English maker Michael Butterfield.
calendar: system of reckoning dates, see article on time and date.
calendar-zodiac scale: scales relating the sun's position in the zodiac to the date.
caliper: instrument used to take dimensions. One type has two curved legs whose endpoints are used to determine the diameters of spheres.
Cardan suspension: universal mounting attributed to the 16th-century Italian philosopher and physician Girolamo Cardano which, by means of gimbals, allows the supported part to remain horizontal irrespective of the orientation of the rest of the instrument.
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