Extensive table showing lengths of pendulum for a variety of wheel trains.
Paper cover, 8 pages. Printed for the author. Paris, no date, circa 1850.
M Viel-Robin, rue des Fossés, Montmarte, Paris, clockmaker. His "convenient" method of finding the length of any pendulum - of particular use when a pendulum is missing.
Rare. Good clean condition apart from a rusty staple and shelf wear to cover.
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