'A group of sclontisis from the Cruft Laboratory of Harvard. Us versity are on their way to Siberia. Their particular study will be the effect of the eclipse on radio signals. Mr. RR. Beal, Research Superviser of the Radio Corporation of America, who has for years been studying the effect of solar activity on radio transmission, will ce-operate with the Harvard' Expedition, "The ionosphere, that region of the earth's outer atmosphere from short waves are reflected and bent in their transit over long distances, consists of several layers whose distance {rom the earth varies. These layers act differently upon radio waves of different lengths. The ex-edition will make measurements on the reflection of radio waves from here as well as in Shanghai and elsewhere for his performances at the London Coliseum, one of which, in 1921, was a command performance before their Majesties.
Mr. de Lys served with the Allies in the Great War, and gave a command performance on the Western Front, during the late King George's, tour of inspection.
Captured by the Turks in 1915, he contrived to escape, disguised as a wwoman- Thus his ability for imper-Sonation stood him in good stead. the fonosphere at their station at Akbulak in northwestern Russian Turkestan.
The more accurately solar phenomena can be measured and understood the more efficiently wavelengths employed in long distance communication can be selected for various times of day, and for different seasons of the year.
"The American Eclipse Expedition expects that their tests will contri. dure to our knowledge of the effect of the sun upon the ionized layers fof the atmosphere, and will also throw considerable light upon nature "of the radiation from the sun, A (oral eclipse provides exceptional opportunity to observe through a very side range of changing conditions, within a very short space of time, Measurements begin In very bright sunlight, continue through darkness fand back again to sunlight in so short a time that conditions of pres Sure and moisture will not have opportunity to vary, and changes Which may be observed will be duo Yo the presence or the absence of the sunshine. If similar measurements were token st noon and at midnight there Is always the possibility that during the intervening twelve Rours, various causes muy combine to modify the effects observed; fand itis diMieult to be sure as to what role is being played by the
Text read from the printed page and cleaned; old type leaves the occasional error.