From gun to nerve

In Of frogs and men: the origins of psychophysiological time experiments, 1850–1865, Henning Schmidgen retraces the history of Helmholtz’s experiments on the propagation of stimuli within nerves. The first apparatus designed by Helmholtz repurposes a mechanism of the physicist Claude Pouillet in the field of ballistic, to measure the velocity of a bullet at different points of its trajectory.


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