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Holder (Definite): The Journal of PhysiologyDate: From 1 Dec 1896 to present
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CitesO.N. Rood, 'On a Photometric Method which is Independent of Color', American Journal of Science 46 (3) (1893), pp. 173-176.
Description:'the method gives a ready and accurate means of obtaining measurement of quantity of contrast-effect, i.e. in terms of frequency of intermittence, that is in the same terms as of the "flicker" method of colour photometry introduced by Rood.
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Cited byC.S. Sherrington, 'On Reciprocal Action in the Retina as studied by means of some Rotating Discs', Journal of Physiology 21 (1) (1897), pp. 33-54.
Description:'Photograms were taken from the disc (several separate specimens of the disc were made and photographed) in rotation. No difference between the two bands was discernible in the photograms [note: 'The photograms and the discs were demonstrated before the Physiological Society, November 14th of last year, cp. Proc. Physiol. Soc. p. xviii. This Journal, vol. xx.']' (39)
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Related toMaterial relating to Charles Sherrington's work on ocular physiology and binocular vision
Description:'Influence of simultaneous contrast on "flicker" of Visual Sensation - By C. S. SHERRINGTON.
It was demonstrated upon a number of rotating discs that the "flickering" of sectors of a disc turning at speeds insufficient to give perfectly fused sensation is much influenced by "simultaneous contrast" acting upon those sectors. Contrast could thus be made to lower or heighten the speed of rotation requisite to cause steady combination of two colours. The amount of lowering or heightening obtainable was very considerable indeed, raising the minimum frequency of intermittence allowing fusion for the same couple of physical colours from e.g. 22 to 34 per second, or again from e.g. 35 to 51 per second. It was pointed out that the method showed it possible to dismiss from consciousness all difference between the different backgrounds causing contrast to appear in stripes laid on them and yet retain consciousness of a difference between the stripes. It was also pointed out that the method gives a ready and accurate means of obtaining measurement of quantity of contrast-effect, i.e. in terms of frequency of intermittence, that is in the same terms as of the "flicker" method of colour photometry introduced by Rood.' (xviii-xix)
[nb cites 'Rood, American Journal of Science, XLVI. p. 173.']
