I HAVE not yet heard it stated that our perception of colour is slower for the blue and violet rays than for the green, yellow, and red ones; and as I think that this subject has interest for many of your readers, they will perhaps carry out the following simple experiments on themselves and their friends.
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STROMEYER, C. The Perception of Colour. Nature 36, 246 (1887). https://doi.org/10.1038/036246a0
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