Thermal Radiation in Absolute Measure. 



Table IV. 



Pts and Pfc4.. Diameter of Wire, 0*025 cm. 



Temperature. 



bright wire. 



sooted wire. 



Bfttio 

 sooted/bright. 



150 



0-7 



3-3 



4-71 



200 



1-1 



6-9 



5-4 



250 



1-8 



9-2 



5-1 



300 



2-7 



13-5 



5-0 



350 



3-7 



18 -6 



5-0 



400 



4-9 



24-1 



4-9 



450 



6-4 



31 -0 



4-9 



500 



8-0 



38 -7 



4-84 



550 



10-1 



46-5 



4-6 



600 ■ 



12-1 



54-0 



4-5 



650 



15 9 



67-5 



4-2 



750 



21 -8 



86-5 



4-0 



Pt, and Pt,: 



Table Y. 

 Diameter of Wire, 0*0 15 cm. 



Temperature. 



Energy lost by 

 bright wire. 



Energy lost by 

 sooted wire* 



j Ratio 



j sooted/bright. 



200 



10 



4-5 



4-5 



250 



1-3 



5 7 



4-4 



300 



2-0 



8-7 



4-35 



350 



3-2 



13-0 



4-06 



400 



4-7 



18-8 



4-0 



450 



7 



27-4 



3-9 



500 



9-9 



37-8 



3-8 



550 



14-9 



57-0 



3-8 



