Thermal Radiation in Absolute Measure. 



00/ 



Fig. 



-Emission of heat from three sooted platinum wires, Pt 2 , Pt 4 , 

 Pt R , of different diameters as indicated, 



w 





















i 



%,M 



im.-OL 



c 

 bcm. n 



Pt 3 ,c 



J '05 



'/am. | 



42C/rt\ 



C//d/77.\ 



cm/* 



65 

 30 

 75 

 70 

 65 



to 



55 

 50 

























x]~ 





f 025 





























/ 



/ 



1 



























/ 





S 3 



1 























/ 



r 





■8 



9 



<0 























/ 







,1 



9" 1 



















J 



If 









$1 



.1 



















I 



/ 









<4 



.1 



><3 





























40 



5" ni 



r.5 

 1 

















// 



7 











S3 8 



•f5 <0 



sr 



Si 

















/// 















,5 •* 



* 



§ 















o// 















25 



to 



1 































V3 













































\/ 

















JO 



5 















/ 



/ 



: 

















































o , 



e^ 



<*> 

























50 



100 150 ZOO 250 300 550 400 450 500 550 600 650 700 75Q 



TempemCure in degrees Centigrade 



