519 
Rusens: Messungen im langwelligen Spectrum. 
Fig. 3. 
Reststrahlen von Steinsalz. 
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Te S | | & 
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| u S Es R ki N 
wu = 
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Sn nn ar a ER EEE = 5 - S 
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BARRRaRERE ZEZEIETERT m ne EL 
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gr € R 
nett S ag = S 
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BD 
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a BE I = 3 = s Spare 8 
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