nil: i.o.inin si KM.uaxr. n.i.i.cn.ii'ii c.tni.r. 



.171 



artilicial lint- ih.m witli the tluii |)r()p()st(l c.ildi-. 1"^. ") sliows a photi)- 

 graph of the artificial liiu', tlie roils of wliicli arc in tin- larj^c iron 

 jxits and the resistance and paper condenser capacil>' units of which 

 are in the steel cases. This line was e(|ui\alent to a l.TtM) nautical 

 mile calile loaded with M) millihenries per ii.m. .ind o\(,r it leKil>I<' 



I'ig. 5 — Luailitl Artificial Lint- 



signals were secured at speeds up to more than 2, GOO letters per 

 minute. Such a sfieed of operation was quite beyond the range of the 

 then available telegraph instruments, and accordingly special transmit- 

 ting and receiving instruments were required. The multiplex dis- 

 tributor of the Western Klectric printing telegraph system proved 

 an excellent transmitter for experimental purposes and, for receiving, 



