IN a work with this title one naturally expects to find that such recognized authorities on the theory of colour perception as Young and Helmholtz are treated with the respect due to their labours and ...
Scientists have demonstrated a technique that allows humans to perceive a previously unseen, intensely saturated blue green ...
HAPPENING to be reading out of doors, while the sun was shining on my book, I noticed that patches of weed on the lawn appeared peculiarly conspicuous in their difference of tint from the grass. The ...
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