Specifications for the multiplex printing telegraph system : theory and operation (1920)
Western Union Telegraph Company · [New York?] : The Company · leaf 303
r M y v y V V V v V V V V V V v V V V V V t ls-= u g „ ! ■ ! 1 1 ! ! 1 ! 1 ! ■! ! ; ! ! 1 1 1 1 1 1 g 11 = S uihi1irtirt 1 irtirtiftiS 1-1ijiSii! 11^1 irt/im1*1! ^s=° … DOOOOOOOO 0000600000 OOOOOOOQQQ is ■y^7vvvv1^Jvvfvlv,vfvfy!vlvlvfvjvlv,^ .n.rt.fi M rt 1*1 r*i ft rh rh f^i.r^r^tt/irt/r*i_A rh rt hf k «8 r- cq
Telegraph
Internet Archive · Northeastern University Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten20unit-1111-494.webp)
