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The Helmholtz CurvesTracing Lost Time$
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Henning Schmidgen

Print publication date: 2014

Print ISBN-13: 9780823261949

Published to Fordham Scholarship Online: May 2015

DOI: 10.5422/fordham/9780823261949.001.0001

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A Research Machine

A Research Machine

(p.55) Three A Research Machine
The Helmholtz Curves

Henning Schmidgen

Fordham University Press

This chapter reconstructs the electromagnetic timing device Helmholtz had used in the first series of this experiments. Combining a mirror galvanometer, a telescope and a frame for nerve-muscle samples from the frog, his research machine allowed for reading off numerical values concerning muscle movements that, by means of complicated calculations, were transformed into time measurements. Helmholtz wife, Olga, was assisting Helmholtz in conducting the measurements and recording the results.

Keywords:   Hermann von Helmholtz, Olga von Helmholtz, Time Experiments, Galvanometer, Precision

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