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St. Nicholas [serial] (1873)

Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 103

An illustration from St. Nicholas [serial], 1873, leaf 103
THE MACHINERY OF A WATCH The power to keep in motion the machinery of awatch is supplied by the mainspring. In windinga watch, this spring is coiled in the central partof its holder, known as a barrel. The main-spring in its constant endeavor to uncoil turnsthis barrel in one direction, and its…

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