"Tue Year Boox or Wrretess Texe-GRapuy AND Terepnoyy."" 1922, The Wireless Press Ltd., London.
This bulky new Year Book of about 1,500 pages brings the record of wireless telegraphy and telephony right up to date. It will be found invaluable both to the professional and amateur and indispensable to the Jand station and ship at sea.
Nothing of extraordinary importance has occurred during the year to affect this new branch of science. The outstanding feature, perhaps, has been the development of high speed working with its accompanying development of methods of wireless recording. Both of these subjects are dealt with in a special section, Which also contains other important contributions by authorities on radio practice. Special reference may also be made to the meteorological section, the importance of which is greatly increased with the development of commercial flying and in the improvement in wireless service for distributing weather reports. Apart.from it being brought completely up to date in its sections, it has several new features of value not only to those interested in radio development. Another development of the past year, especially in America, has been the important part played by the amateur in developing radio by the formation of small stations scattered throughout the country. A directory of these English licensed amateur transmitting stations is included in the work.
One would have thought that map projection had already been thoroughly covered by the many series—cylindrical, conical, Mercator's, ete.—included in most atlases Tt remained, however, for the Year Book to produce a projection with London as its centre on which the actual distance of any point on the earth can be measured directly and also its true direction. This information could only be previously obtained by complicated mathematical calculations or by measurements on a globe.
The different sections of the book include various calendars, records of wireless developments, international laws and regulations, a complete directory of the world's land and ship stations, international call letters of time and weather signals, a resume of progress in various countries and the special articles to which we have referred above.
Text read from the printed page and cleaned; old type leaves the occasional error.