James Wallace. 4 most and the outermost we have also traced the intermediate. The ether waves of the inner and outer vibration would necessarily give rise to the wave of the intermediate vibration. Let us increase in imagination the number of vibrations to seven, to correspond with the usual… … we have one and three, red and yellow, for example, we see number two, orange. To understand this we must take one color alone, say red. Each undulation will, therefore, have at first only the vibrations of the red waves, which pass through the centre. As the periods of expan¬ sion and contraction…
Color Perception · Light
Internet Archive · U.S. National Library of Medicine · Public domain (published before 1931). Free to use for anything.
