In the later years of his life he was engaged in developing a system of multiplex telegraphy.
The proposed multiplex is certain to have significant effects on the environment.
The system brought out in 1874 by Emile Baudot and since considerably developed is a multiplex system giving from two to six channels on one wire, each channel giving a working, speed of thirty words per minute.
The Murray automatic system is not regarded as suitable for short telegraph lines or moderate traffic, printing telegraphs on the multiplex principle being considered preferable in such circumstances.
The BBC had originally promised an educational channel on its digital terrestrial multiplex.