Five of Maxwell's Papers

Synopsis

This eBook includes 5 papers or speeches by James Clerk Maxwell.

The contents are:

•    Foramen Centrale
•    Theory of Compound Colours
•    Poinsot's Theory
•    Address to the Mathematical
•    Introductory Lecture

When observing the spectrum formed by looking at a long ve rtical slit through a simple prism, I noticed an elongated dark spot running up and down in the blue, and following the motion of the eye as it moved up and down the spectrum, but refusing to pass out of the blue into the other colours. It was plain that the spot belonged both to the eye and to the blue part of the spectrum. The result to which I have come is, that the appearance is due to the yellow spot on the retina, commonly called the Foramen Centrale of Soemmering. 

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