8040 



8040 Comparison of wave- 



lengths, intensity and width, in 

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8050 Identification of Elements 

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8080 Physical Constitution 



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8120 Study of special types of 

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Scheiner, J. Ueber die Sternspectra 

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8200 SPECTROSCOPY OF. 



NEBUL.E AND CLUSTERS. 



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8300 SPECTROSCOPY OF 



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BelopoliskiJ, A. A. Sur le spectre de 

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Details complementaires 



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