Abstract
IV. Balance Springs. THE earliest watches were constructed, so far as the escapement and balance were concerned, upon exactly the same plan as the clock from Dover Castle, and in this condition they must have perpetually remained (useless as time-measurers), but for the invention of the balance-spring (sometimes called the pendulum-spring, on account of the uniformity it imparts) by Dr. Hooke.
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Principles of Time-Measuring Apparatus1. Nature 15, 9–11 (1876). https://doi.org/10.1038/015009a0
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DOI: https://doi.org/10.1038/015009a0