viii CONTENTS 



CHAPTER V. 



Considerations of the Telephone and Telegraph Lines and 

 their Influence on Photo-Telegraphy . . . p. 108 



CHAPTER VI. 



The Telestereograph of M. Belin The Early Work of Belin 

 Changes in his System Recent Experiments . p. 116 



CHAPTER VII. 



The Transmission of Photographs and Pictures by Wireless 

 Telegraphy p. 127 



INDEX 143 



