Society of Glass Technology · [Sheffield] · leaf 495
it 25 per cent. J. R. C. 119. The Refractometry of Prisms. J. Guild (Proc. Phys.Soc, 1921, 33, 179).—An extension of the paper referred to in thisvol., Abs. No. 25. The problem of the refraction of light throughprisms was considered more generally, and several particular caseswere discussed. These… … Fig. 49.£j S2 Silvered Surfaces a=Polarising Angle. OPTICS AND OPTICAL INSTRUMENTS. 65 120. Cylindrical Lenses for Spectrographs. E. Gehrcke{Zeitsch. Instrumentenkunde, 1911, 31, 87).—The author suggestedthe use of a cylindrical lens, placed with its axis perpendicular tothe slit, to concentrate…
Glass
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