On August 12, 1877, Edison completed the phonograph. When he told the audience what this creation did, no one believed him. It wasn't until he did a demonstration to prove that his creation worked that people stopped criticizing him. He said "Mary had a little lamb" into the machine and, much to the audience's surprise, the machine answered him. Although the phonograph appeared to be a brand new and unique invention, it was actually the result of two different inventions that Thomas Edison had in the works. The phonograph was created when Edison assembled the telegraph and the telephone. When creating the Telegraph, he realized that a phonograph could use the same technique to convey a message, but this time with sounds rather than words. The phonograph worked in a very similar way to the telegraph: when you spoke into the mouthpiece of the phonograph, it vibrated two needles which made indentations on the metal inside the cylinder, then the second needle was used to read the prints placed in the cylinder. metal and play it. Edison opened and created the Edison Talking Phonograph Company. Edison recommended different uses of the phonograph, for example, letters and correspondence, phonograph books for the visually impaired, a family record (recording parents in