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On some recent improvements in clock-escapements
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Indicator map London with the recent improvements
Rare Books
Alternate title from cover. With measuring tape bound in. Prime meridian: GM. Relief: no. Graphic Scale: Miles. Projection: Cylindrical. Printing Process: Lithography. Verso Text: Sticker - Henry F. Gillig & Co. MS notes: Maps Smith, Charles, of London scarce.
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