Baly, E. C. C. (Edward Charles Cyril), b. 1871 · London, Longmans, Green · leaf 136
s vertical axis by the rod H, the two being connected by bevelgearing. Fig. 45 shows a spectrometer made by Hilger for Mr. J. W.Gifford, who has very kindly allowed me to reproduce it. Themain features of this instrument are clearly enough shown in theillustration; there are, however, certain… … Fig. 44. to the fact that there is always a slight amount of side-play inthe focussing arrangements when brass tubes sliding into oneanother are used. The adjustments for focussing in this in-strument can be seen underneath the leather bellows, andconsist of tongued and grooved metal slides, as…
Spectrum analysis
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