The following January from Wellsfleet, Cape Cod, President Roosevelt
sent a congratulatory message to King Edward. The electric waves
conveying this message traveled 3,000 miles over the Atlantic following
round an arc of forty-five degrees of the earth on a great circle, and
were received telephonically, by the Marconi magnetic receiver at
Poldhu.

Most ships are provided with syntonic receivers which are tuned to
long distance transmitters, and are capable of receiving messages up
to distances of 3,000 miles or more. Wireless communication between
Europe and America is no longer a possibility but an accomplishment,
though as yet the system has not been put on a general business basis.
[Footnote: As we go to press a new record has been established in
wireless transmission. Marconi, in the Argentine Republic, near Buenos
Ayres, has received messages from the station at Clifden, County Galway,
Ireland, a distance of 5,600 miles. The best previous record was made
when the United States battleship _Tennessee_ in 1909 picked up a
message from San Francisco when 4,580 miles distant.]




CHAPTER III

RADIUM

Experiments of Becquerel--Work of the Curies--Discovery of
Radium--Enormous Energy--Various Uses.