Baly, E. C. C. (Edward Charles Cyril), b. 1871 · London, Longmans, Green · leaf 207
ayser, Handbuch der Spectroscopie, i. 463. THE DIFFRACTION GRATINGand for the whole length of the lines— -. + sin i . tan i . I, 189 cos twhere s is the length of the slit. As a result of this astigmatism, dust lines, which arisefrom the presence of particles of dust between the slit jaws, arenot… … Fig. 68. by means of the draw slides upon the slit, or a comparisonprism, as described upon p. 58, for prism apparatus. Forsuch comparison a mechanical method is usually used {videtnfra, p. 212). Sirks,^ however, has shown that a comparisonprism can be used if it be placed a certain distance away…
Spectrum analysis
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