Baly, E. C. C. (Edward Charles Cyril), b. 1871 · London, Longmans, Green · leaf 152
ownin its grooves a number of photographs may be taken uponthe same plate. A rack and pinion arrangement should beattached so as to allow the dark slide to be brought to anydesired position, and it is also well to have a scale marked onthe frarile carrying the dark slide, so that the position of… … THE COMPLETE PRISM SPECTROSCOPE 137 without the successive photographs over-lapping. This may bedone either by using only a very short slit or by having a screenwith a narrow rectangular opening placed just in front of thephotographic plate. The above arrangement is shown inFig- S3- CHAPTER V THE…
Spectrum analysis
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