
[http://nla.gov.au/nla.pic-an8988955-v]
Humans have a passion for communication and over the last 100 years or more we have invented a vast array of different communication media. Today messages are pushed down pipes, bounced off satellite dishes and travel invisibly through the air. We have burned messages into tin, wax, shellac, vinyl, plastic, photographically printed them and magnetically and mathematically encoded them.
Discussion
The telegraph is one of the earliest media for communicating messages. It used a language called Morse code. What is Morse code and how did it work?
What was the first message on the overland telegraph line?
The telegraph was eventually superseded by the invention of the telephone. Why?
What were the advantages of the telephone over the telegraph?
Who invented the telephone and when did it come into common usage?





