Baly, E. C. C. (Edward Charles Cyril), b. 1871 · London, Longmans, Green · leaf 133
s also made torotate round the pin L,this motion being usefulfor bringing the prisminto the position ofminimum deviation; thelower table N is fixed,and is graduated so thatthe angular movementsof M may be measuredif required. The centraltable K is also divided,and the movements ofthe telescope are… … -^^ ii8 SPECTROSCOPY telescope are provided with rack-and-pinion adjustments forfocussing. A simple measuring instrument has also been made in whicha direct-vision prism train is employed, and has been used forordinary work by Ramsay. A diagram of such an instrumentis shown in Fig. 42 ] the…
Spectrum analysis
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