Baly, E. C. C. (Edward Charles Cyril), b. 1871 · London, Longmans, Green · leaf 230
ent to theproper radius. There is in B a frame which can be movedvertically by a rack and pinion; and to this A is fastened bydowel pins on the bottom and hooks on the top. On the back 212 SPECTROSCOPY of the camera box B is hinged a board, C, which can be heldfirmly in place by books. This board… … Fig. 76. confined to 90°. This plate is used for the comparison ofspectra. The slit used in all grating apparatus must, necessarily, beprovided with an arrangement whereby it can be rotated in its own plane, on account of HP 3 Fig. 77. the fact that it is essentialfor the slit aperture to betruly…
Spectrum analysis
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