Definitionn. plug for the muzzle of a gun to keep out dust and moisture
Last update: June 18, 2015
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To Thomas Tompion, "the father of English watchmaking," is ascribed the honour of first fitting a _hairspring_ to the escapement of a watch, in or about the year 1660. [Please select]
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Graham, the partner of Thomas Tompion, took advantage of the fact that different kinds of metal have different ratios of expansion to produce a _self-compensating_ pendulum on the principle illustrated by Fig. [Please select]
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