TRANSMITTING LINE SKETCHES 125 



a disadvantage. For the telegraphy of line draw- 

 ings/ pen-and-ink sketches, etc., he employs a 

 much simpler arrangement than the microphone, 

 a diagram of which is given in Fig. 57. A 

 metal arm FM is placed so that it can turn 

 about F, and it has a stylus S that presses lightly 

 against the transmitting drum. The line pic- 

 ture is prepared by the carbon process, and each 

 line is in high relief. When a line comes into con- 



FIG. 57. 



tact with the stylus the arm FM is pushed out- 

 wards, and the two platinums /?, p are thrown out 

 of contact. This breaks the electric circuit, and 

 current no longer flows into the line to the re- 

 ceiver. It is claimed that this method is particularly 

 suitable for the transmission of writing or printed 

 matter, and might prove of value for international 

 banking purposes, etc. Such a transmitter is of 

 course only an alternative to the Casselli trans- 

 mitter, as used in the Korn telautograph and the 



