circa 1927: American inventor Thomas Alva Edison (1847 - 1931) celebrating the 50th anniversary of his invention of the phonograph by broadcasting the record 'Mary Had a Little Lamb'. (Photo by Keystone/Getty Images)
circa 1927: American inventor Thomas Alva Edison (1847 - 1931) celebrating the 50th anniversary of his invention of the phonograph by broadcasting the record 'Mary Had a Little Lamb'. (Photo by Keystone/Getty Images)