chief, pivotal, early 14c., from Latin cardinalis principal, chief, essential, from cardo (genitive cardinis) that on which something turns or depends; pole of the sky, originally door hinge, of unknown origin. Related: Cardinally. The cardinal points (1540s) are north, south, east, west.
Twenty years after the telephone was invented and music was first sent down a telephone line, Guglielmo Marconi sent radio signals. Marconi (1874-1937) was born in Italy and studied at the University of Bologna.he next year Marconi opened the first radio factory in Chelmsford, Essex and established a radio link between Britain and France. A link with the USA was established in 1901.
Publisher. A+E Networks. On this day in 1922, President Warren G. Harding, while addressing a crowd at the dedication of a memorial site for the composer of the âStar Spangled Banner,â Francis Scott Key, becomes the first president to have his voice transmitted by radio.ike Harding, President William Taft used the phonograph to distribute recordings of his speeches. However, the most rapid advancement in communication for presidents occurred in the 20th century. With the invention of radio and television and then the internet, politicians could transmit information instantaneously.