The first great thing made by Thomas Edison in 1877 was the tin foil phonograph. While working to make the efficiency of a telegraph better and he found out the tape of the machine gave off a sound resembling spoken words when played at a high speed. This made him think he could record a telephone message. He started to work with diaphragm of telephone receiver by attaching a needle to it. He reasoned that needlecould prick paper tape to record a message. His experiments led him to try a stylus on a tinfoil cylinder, which, to his great surprise, played back the short message he recorded, "Mary had a little lamb."
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