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BELL SYSTEM TECHNICAL JOURNAL 



use in high speed photography. The camera has been adapted to 

 use standard amateur 16 millimeter motion picture film and the com- 

 mercial processing service of the film supplier is used. High-speed 

 motion pictures in color are readily made, utilizing available films and 

 processing. 







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Fig. 4 — Camera with portable lighting units used for high speed work. 



The optical intermittent type of camera has certain advantages over 

 other types. The unit is self-contained and is independent of lighting 

 equipment. It can be made relatively light in weight and highly 

 portable. Further, it can be applied to the study of self-luminous 

 sources as required in the study of arc lamps, lamp burnouts, fuse 

 burnouts and other problems where the phenomena under investigation 

 are self-luminous. 



