Discoveries and inventions of the nineteenth century (1905)
Routledge, Robert · London : G. Routledge and Sons · leaf 467
ght, which is a mixture of avast multitude of elementary rays,ired, yellow, green, &c. When sucha beam falls obliquely upon a pieceof glass, the ray is, at its entrance,broken up into its elements, for these,being refracted in different degreesby the glass, each pursues a different path in that… … 4i8 THE SPECTROSCOPE. consequence of this, the separation is not perceptible under ordinary cir-cumstances with plates of glass having parallel surfaces. But, if the secondsurface be inclined so as to form such an angle with the first that the rajsare rendered still more divergent in their exit,…
Inventions
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