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A Tenth of a Second: A History - download pdf or read online

By Jimena Canales

ISBN-10: 0226093182

ISBN-13: 9780226093185

In the overdue 15th century, clocks obtained minute arms. A century later, moment fingers seemed. however it wasn’t till the 1850s that tools may well realize a 10th of a moment, and, after they did, the impression on glossy technological know-how and society was once profound. Revealing the historical past at the back of this infinitesimal period, A 10th of a Second sheds new gentle on modernity and illuminates the paintings of significant thinkers of the final centuries.

Tracing debates concerning the nature of time, causality, and unfastened will, in addition to the advent of recent technologies—telegraphy, images, cinematography—Jimena Canales locates the reverberations of this “perceptual second” all through tradition. as soon as scientists linked the 10th of a moment with the rate of notion, they built response time experiments with lasting implications for experimental psychology, body structure, and optics. Astronomers and physicists struggled to regulate the profound results of effects that have been a 10th of a moment off. And references to the period have been a part of a basic inquiry into time, realization, and sensory event that concerned rethinking the contributions of Descartes and Kant.

Considering its influence on for much longer time sessions and that includes appearances through Henri Bergson, Walter Benjamin, and Albert Einstein, between others, A 10th of a Second is eventually an enormous contribution to historical past and a unique standpoint on modernity.

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If the personal equation was related to the speed of thought, and if it could be reduced through 13. Hermann von Helmholtz, “Ueber die Methoden, kleinste Zeittheile zu messen, und ihre Anwendung für physiologische Zwecke,” Königsberger Naturwissenschaftliche Unterhaltungen 2 (1851): 325, and “On the Methods of Measuring Very Small Portions of Time, and Their Application to Physiological Purposes,” The London, Edinburgh and Dublin Philosophical Magazine and Journal of Science 4 (1853): 189. 14. Otto Eduard Vincenz Ule, “Sur les moyens de mesurer la pensée: Lettre de M.

02´´). Both of these values differed markedly from the ones obtained from direct measurements during an 1842 total eclipse. 54. Arago disagreed with the attribution of the “origin” of the discovery of personal errors in measurements of length to Baily. He called it a petite malice from Faye. Arago insisted it was him, and not the British astronomer, who was the discoverer. ” Arago, “Sur les observations des longitudes et des latitudes géodésiques,” 147. This work summarized numerous discussions that took place at the Académie des sciences during the early part of 1853.

But if these sensations come from different senses where the nerves end up at different parts of the brain, the internal eye will need to move in order to go from one area to another, and the time spent doing this will not be detected. Sensations separated by a very real interval will be wrongly perceived as having occurred at the same time. The lost time used to go from one sensation to the other can amount to over a second. 50 The famous physicist Henri Victor Regnault (whom Helmholtz described as the best French scientist) explained how determining these errors was urgent.

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A Tenth of a Second: A History by Jimena Canales

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