Baly, E. C. C. (Edward Charles Cyril), b. 1871 · London, Longmans, Green · leaf 345
INTERFERENCE METHODS IN SPECTROSCOPY 32? the other is very nearly plane. The two faces of each disc arenot parallel to one another, but enclose an angle of about i,so as to evade any possibility of interference being set up bythe glass discs themselves. L, which is next to the observer, can be… … FiG. 128. ments parallel to the path of the light. The first of thesemotions is obtained by rotation round two axes, O and O(Fig. 128), which are vertical and horizontal respectively. Thefine parallel adjustment is obtained by the deformation of astrong steel spring, P, the centre of which is fixed…
Spectrum analysis
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