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The Stars in Their Courses
Shadows on the Land
Grains of Sand and Falling Water
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accuracy adjusted alarm American astronomical balance spring balance wheel barrel bell brass calendar called cannon pinion cap jewels chronometer clepsydra Clockmakers Clocks and Watches collection Company Daylight Saving dial diameter early eighteenth century enamel England English engraved escape wheel factory famous figures French fusee gilt glass gnomon gold Greenwich Gruen hairspring hole horological horologist hour hand Huygens important inches indicating industry invented isochronism later lever escapement London mainspring manufacture means mechanism ment meridian metal minute hand modern watch month moon move nineteenth century Observatory old clocks operation pallet pallet fork pendulum perfected pinion pivots placed plate pocket watch popular produced screws second hand seventeenth century silver solar stars striking style sundial swing Swiss Switzerland temperature timekeeping timepiece tion train turn twelve United verge escapement watch movement watchcase watchmaking weight winding wrist watch York