Publisher's Synopsis
Excerpt from Workshop Appliances: Including Descriptions of the Gauging and Measuring Instruments, Hand Cutting Tools, Lathes, Drilling, Planning, and Other Machine-Tools Used by Engineers
During this interval, however, not only did several private individuals and learned societies provide themselves with standards, but scientific men turned their attention to devis ing means for the recovery of the national standard - if it should ever be lost or destroyed. Accordingly a Committee in 1814, after recommending the adoption of Bird's standards, defined the British yard as consisting Of thirty-six inches, the length of a pendulum making one vibration per second being 3g°13o47 of such inches. In 1819 a Commission was appointed by the Prince Regent, which in that and the two following years presented three Reports. In the first Report the length of the seconds' pendulum, and also the weight Of a cubic inch Of distilled water, were stated but in the second and third Reports respectively both of them were altered, the former to 3913929 inches, the latter to 2 grains, - under certain stated conditions. These Reports resulted in the Act of 1824, by which Bird's standard of 1760 was at length legalised.
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