1884.] Energy and Radiation in Incandescence Lamps. 169 



FIG. 5. 



Table XIV. Radiation of Platinum Wire Lamp (spectrum), watts 

 = 12'2, and also of Carbon Filament Lamp (spectrum), watts 



Platinum wire 

 lamp. 



- 

 1 



3 



9 



13 

 18 

 24 

 28-5 

 26-5 

 22 

 16-5 

 11-5 



7-5 



Carbon filament 

 lamp. 







1 



3-5 



10-5 

 . 16-0 



21-5 

 . 29-0 



34-0 



32-0 



26-5 



19-5 



. 14-0 



9-0 



