Newall, H. F · London : Society for Promoting Christian Knowledge · leaf 178
Plate III. … S. Position of slit on axis of telescopeF. Finder E Eyepiece to view star on slitIS. Iron sparkL. Lens of collimator PL. Photographic PlateT. ThermometerF. FinderC. CameraP. Prisms THE EYE-END OF A TELESCOPE WITH A STELLAR SPECTROSCOPE ATTACHED (Cambridge Observatory) see p. 89 Plate IV. » fci eS -…
Spectroscope · Spectrum analysis
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