Figure 16„ Side view of NEL 

 lamp cluster under the bow of 

 the bathyscaphe 



Figure 17. Bottom view 

 of bow lamp cluster. 



Figure 18. Two five-lamp 



clusters of NEL lamps, 

 amidships. 



Figure 19. Edgerton 

 lamp mounted on bathy- 

 scaph ballast tube for 

 use with closed-circuit 

 TV. 



20 



