692 



HANDBOOK OF PHOTOGRAPHY 



3^800 

 3,600 

 3,400 

 b 3.200 

 Ij 3,000 

 ° 2 2,800 

 £ S 2,600 

 g Q. 2,400 

 5R C 2.200 



■§^ 



Ou. 



^^ 



■OP 



2,000 



1,800 



1,600 



1,400 



1,200 



1,000 



800 



g 600 



S 400 



200 







Fig. 38. 



24 20 16 12 8 4 4 8 12 16 20 24 

 Degrees of Divergence 



Light-distribution diagram of high-intensitj^ arc. 



Fig. 39. — Mechanism of high-intensity arc. 



