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■ . R P \ \ 13 



Dunkle Linien in dem photographirtea Spectrum weit iiher dem *icht- 

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M( thod of fixing, photographing, and exhibiting the magnetic Bpectra. 

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Reversal of the metallic lines as Been in over-exposed photographs of 

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4;! 



r aeue Fortschritte in < k- m farbenempfindlichea photographischen 

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11 5J 



PB RS. 



P] toi 

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2 3 



