126 PHOTO-TELEGRAPHY 



author's telectrograph, and is not so practical, since 

 the figure of merit of the contact breaker would 

 require to be very high indeed to enable it to 

 compete with the metal stylus tracing over a 

 flush surface. 



The synchronising arrangements, motors, etc., 

 used in the telestereograph are so similar to those 

 already described that any further reference to them 

 is unnecessary. It may be said in conclusion, how- 

 ever, that M. Belin has found one solution to the 

 problem of photo -telegraphy which may prove 

 important when further matured. 



