MacMunn, Charles Alexander · London, Churchill · leaf 45
o prisms of flint glass between threeof crown glass, united together by means of balsam(fig. 11, p. 24). By this arrangement deviation iseliminated, while sufl&cient dispersion is retained. The 24 THE MIOEOSPECTEOSOOPB. tube (a, fig. 12) contains tlie prisms and is capable ofbeing approximated… … in the spectrum are not in focus at the same time.0 is a milled head, which opens or shuts the slitvertically, while h regulates the slit horizontally. D dis a stage perforated with a square hole, which admitsthe light to a right-angle prism (shown in fig. 11)covering half the slit, so that by…
Spectrum analysis · Diagnosis, Spectroscopic
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