Discoveries and inventions of the nineteenth century (1905)
Routledge, Robert · London : G. Routledge and Sons · leaf 475
SPECTRA. THE SPECTROSCOPE. 423 represented in Fig. 219. It has a single pri3m,madeof glass, of great powerin dispersing the rays. The prism is supported on a Httle stage, placed in themiddle of a horizontal circular brass table about 6 in. in diameter. On theleft is seen a tube, about 15 in. long,… … Fig. 219.—Spectroscope with one Prism. shdes in a direction at right angles to the slit, and, by means of a springand a fine screw, can be very nicely adjusted, so that an opening of anydegree of fineness can be readily obtained. In front of the slit is a smallglass prism, with its edges parallel…
Inventions
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