556 



TABLE 591.— INFRARED REFLECTING FACTOR OF VARIOUS MATERIALS* 



(percent) 



X= 20/i 

 ~ /cm = 500 



Rough brass 67 



24 



" 12 



Galena 31 



Zincite 50 



p magnesia, fused 80 



Stibnite 21 



Sphalerite 10 



Corundum (30) 



Cuprite 45 



* For reference, see footnote 174, p. 555. 

 TABLE 592.— INFRARED TRANSMISSION OF VARIOUS MATERIALS* 



X= 20/i 



~ /cm = 500 



KBr 



Kl 



Amorphous SiOj 3 



CCU liquid (57) 



KC1 97 



* For reference, see footnote 174, p. 555. 



SMITHSONIAN PHYSICAL TABLES 



