of the radiant heating Effects from terrestrial Sources. 

 No Screen. 



Ml 



(12.) Argand lamp widiout its chimney. Distance 3 inches. 

 Glass Screen. 



No Screen. 



Mean 



1-83 



3-41 



Difference of exposed 

 and screened results 



I 1-42 



1-58 



(13). 



2nd Set. Incandescent iron. Distance 6 inches. 

 Glass screen 2 inches from bulbs. 



Vol. 65. No. 326. Jutic 1825. 



y K 



In- 



