measurement

Edmund Gunter and his Measuring Devices

Edmund Gunter and his Measuring Devices

On December 10, 1626, English clergyman, mathematician, geometer and astronomer Edmund Gunter passed away. Gunther is best remembered for his mathematical contributions which include the invention of the Gunter’s chain, the Gunter’s quadrant, and the Gunter’s scale. In 1620, he invented the first successful analog device which he developed to calculate logarithmic tangents. Edmund Gunter – Early Life Edmund Gunter was born in Hertfordshire in 1581. Edmund attended Westminster School as a…
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Louis Essen and the Precise Measurement of Time

Louis Essen and the Precise Measurement of Time

On August 24, 1997, English physicist Louis Essen FRS, O.B.E passed away. Essen’s most notable achievements were in the precise measurement of time and the determination of the speed of light. He invented the quartz crystal ring clock and the first practical atomic clock. These devices were capable of measuring time more accurately than any previous clocks. He built a cesium-beam atomic clock, a device that ultimately changed the way time is measured.…
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