Bergson, Time and Free Will, Ch 1, §35 "Does Experiment Prove that We can Measure Directly our Sensations of Light?

by Corry Shores
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[The following is summary; my commentary is in brackets.]

Bergson, Time and Free Will

(Essai sur les données immédiates de la conscience)

Chapter I, "The Intensity of Psychic States"

Part XIII: "Sensation of Light"

§35 "Does Experiment Prove that We can Measure Directly our Sensations of Light?"

As light intensities change, the things around us alter subtly in color. However, there are instances when we see only one light change in luminosity. In these cases we would be inclined to think that we have greater and lesser sensations of light. Bergson will now examine such psychophysical experiments to see whether sensation is qualitative or quantitative. (52-53)

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Images from the pages summarized above, in the English Translation [click on the image for an enlargement]:

Images from the pages summarized above, in the original French [click on the image for an enlargement]:

Bergson, Henri. Time and Free Will: An Essay on the Immediate Data of Consciousness, Transl. F. L. Pogson, (New York: Dover Publications, Inc., 2001).

Available online at:

http://www.archive.org/details/timeandfreewill00pogsgoog

French text from:

Bergson, Henri. Essai sur les données immédiates de la conscience. Originally published Paris: Les Presses universitaires de France, 1888.

http://www.archive.org/details/essaisurlesdonn00berguoft