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The Sundial in the Yard of Corpus Christi College at Oxford
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Aaron Willard accuracy anchor escapement arbor attached balance spring balance wheel banjo clocks barrel bell brass Cathedral century chapter chimes chronometer clepsydra clock-watch clockmaker construction controlling mechanism crown wheel dial diameter Ditisheim domestic clocks driving early Eli Terry equation escape wheel famous Fast Fast Fast fastened feet firm four grandfather clocks hairspring hour illustrated in Fig inches indicating invented isochronism jewels lantern clock lever London mainspring maker mean solar ment minute hand modern watch moved Museum Observatory pallet Paris pendulum pictured in Fig pinion plate precision clocks ratchet Seth Thomas Seth Thomas Clock shelf clock shown in Fig sidereal Simon Willard sometimes steel stop striking clock striking mechanism sun-dial swing table clocks teeth tests Thomas Tompion timekeeper tion tooth tower clocks turns usually Waltham watch factories watch movement watchmaking weight Willard winding wound