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New PDF release: A Tenth of a Second: A History

By Jimena Canales

ISBN-10: 0226093182

ISBN-13: 9780226093185

In the overdue 15th century, clocks bought minute palms. A century later, moment palms seemed. however it wasn’t until eventually the 1850s that tools may perhaps realize a 10th of a moment, and, after they did, the influence on smooth technological know-how and society used to be profound. Revealing the background 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 creation of contemporary 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 concept, 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 normal inquiry into time, awareness, and sensory adventure that concerned rethinking the contributions of Descartes and Kant.

Considering its impression on for much longer time classes and that includes appearances through Henri Bergson, Walter Benjamin, and Albert Einstein, between others, A 10th of a Second is finally an immense contribution to historical past and a singular standpoint on modernity.

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Example text

Arago explained how in one particular area of astronomy attention to the tenth of a second was not a “vain luxury,” but an urgent need. 33 Arago grew increasingly preoccupied with the tenth of a second. ” He also called attention to new American-built 30. Marey went to the Observatoire de Paris to learn about Wolfâ•›’s machine for measuring the personal equation. Marey, La Méthode graphique dans les sciences expérimentales et principalement en physiologie et en médecine, 148. Marey also cited the work of the astronomers Prazmowski, Hänckel, Hirsch, and Plantamour.

Measurements of Lengths Another important aspect of the personal equation that was obscured in standard accounts pertained to other, even simpler, measurements, such as length. Cutting across the life and physical sciences, personal equation errors affected disciplines far from astronomy—everywhere exact measurements were used. The history behind these efforts can help us understand how measurement gained the privileged position it would hold for the next century. It can help us voice the complex negotiations behind the establishment of measurement-based science.

In them, du Bois-Reymond argued that measurements of “the speed of voluntary and sensory transmission” were a continuation of the work by the eighteenth-century physiologist Albrecht von Haller, who measured the 23. This interpretation contrasted with the one presented in a previous article on the problem of personal errors in astronomy. In it Radau described various interpretations of reaction time. He documented how a number of scientists believed that in well-trained observers the personal equation was a small, immeasurable, relatively uninteresting, and purely physiological phenomenon, equal or analogous to the time of visual persistence.

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A Tenth of a Second: A History by Jimena Canales

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