LIST OF ILLUSTRATIONS 



FULL PAGE ILLUSTRATIONS. 



A part of the Daily Mirror Installation, showing the 

 Korn Telautograph and the Thorne- Baker Telec- 

 trograph ....... Frontispiece 



Receiving a photograph on the Telectrograph . Opposite p. 100 



ILLUSTRATIONS IN TEXT. 



FIG. PAGE 



1. Diagram of Bakewell's instrument .... 3 



2. Section of a film, showing silver deposit ... 13 



3. Bernochi's wireless apparatus ..... 15 



4. Polarisation receiver of Rignoux and Fournier . . 17 



5. Diagram of selenium cell 22 



6. Photograph of selenium cell 23 



7. Diagram of Korn's selenium transmitter ... 24 



8. Inertia curve of selenium 27 



9. Curve showing effect of light on selenium ... 28 



10. Korn's compensating bridge 29 



11. Curve showing compensation of inertia ... 30 



12. Curve showing compensation of inertia ... 30 



13. Curve showing over-compensation . . . 31 



14. Section of Korn's galvanometer . -33 



15. Section of interior of galvanometer . . -34 



1 6. Korn's receiving apparatus . . . . -37 



17. Photograph of a galvanometer as used by Prof. Korn 38 



1 8. Diagram showing synchronising arrangement . . 39 



19. Diagram of friction clutch ... 41 



20. Photograph of the frequency meter . -43 



21. Diagram of switchboard connections . . 44 



22. Prof. Korn at the telephone, when awaiting the first 



picture from Paris in 1907 . . 4 6 



