Time and Weather by Wireless

Abstract

GREAT advances have been made recently both in distributing the correct time and in distributing meteorological data by broadcasting. In addition, Greenwich time can be obtained with a maximum inaccuracy of the quarter of a second by the ordinary rhythmic signals-the time vernier of General Ferric sent out several times every day from the Eiffel Tower and many other stations. The Eiffel Tower signals (10 and 10.45, A.M. and P.M.) can be received on a crystal set, and practically all the other European stations on a two-valve set. The principal American stations can all be received on a three-valve set. The stations sending out time signals employ a musical note, so it can generally be easily picked out, even when “harmonics “and atmospherics are troublesome. In a few of the world stations, hand signals are employed, so their accuracy may be doubtful to the extent of one second. The ease with which clockmakers get the accurate time from the Eiffel Tower station has already greatly increased the accuracy of the clocks in Great Britain.

Time and Weather by Wireless.

By W. G. W. Mitchell. Pp. xii + 125. (London: The Wireless Press, Ltd.; New York: Wireless Press, Inc., 1923.) 3s. 6d. net.