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<p>Standard Wave lengths in the cadmium spectrum: the wave lengths for 13 lines in the spectrum of tubes containing cadmium vapor aat low pressure are measured relative to the primary standard by means of the Fabry and Perot etalon interferometer. The probable error in most of these values is less than 0.001 A. Constant frequency differences are established which define the separation of subordinate series limits. Evidence that the wave lengths derived spectrum tubes are reproducible is presented.
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<br>Subjects:</div>
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Meggers, W.F., Burns, K.</div>
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