Manual of the science of colour, on the true theory of the colour-sensations, and the natural system : with a coloured frontispiece and other illustrations (1871)
Benson, William, Chapman and Hall, publisher, Vinton & Son, printer · London : Chapman & Hall · leaf 22
nctly the direc-tion in which the spec-trum will appear. The refracting angleof the prism shouldalways be parallel tothe bright line, andshould be so directedthat the light may enterand emerge at nearlyequal angles with thesides of the prism, asindicated in the figures.This position deflectsthe… … 6 When a sunbeam enters a dark room through a slitin a shutter, and passes through a prism held parallelto the slit, the brilliancy of the spectrum (too greatfor direct vision) allows it to be received on a whitescreen. In this way its splendid colours may be seenby many spectators at once, the…
Color · Colors
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