On March 10, 1876 Alexander Graham Bell's voice was discernibly transmitted through wires into another room. "Mr. Watson, come here; I want you." After a year of work, success was his.While a teenager, Bell began to carry on his father's work of teaching methods of how to speak to the deaf. By 1873 he was a professor at Boston University. When not teaching he began experimenting with transmitting sound waves and telegraph lines. He was convinced that voice could be transmitted as well. In 1875 he hired Thomas Watson a mechanic.
In 1877 he founded the Bell Telephone Company, and the telephone went commercial. He sold the company in 1878 and went on to continue inventing, including the graphophone which would recorded sound and the photophone which transmitted speech via light rays. Bell used the royalties from his inventions to support organizations that taught oral education for the deaf.

