Baly, E. C. C. (Edward Charles Cyril), b. 1871 · London, Longmans, Green · leaf 245
87, be the position of the grating,s the slit, r the source or the reflecting prism, and O theobserving eyepiece, placed normal to the grating, and ata fixed distance p from it, as in Rowlands mounting. Then > Astrophys. Journ., 2. 370 (1895). = Ibid., 3. 46 (1896). THE RULED GRATING IN PRACTICE… … Fig. 87. To satisfy these conditions it is necessary to mount the slit on the end of an arm of length -, pivoted at Q, and also we must have from the geometry of the circle Qs X G;-=(GO)= p* = constant.. This can be obtained by means of the Peaucellier linkage 228 SPECTROSCOPY. shown in Fig. 87 ;…
Spectrum analysis
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