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  • Influence
THE VIBRATION OF CIRCULAR PLATES.
THE VELOCITY OF SOUND.
TLDR
Application of the probability laws and the error curve shows that the method is very accurate, providing the alternating current maintains itself invariably at sixty cycles per second.
The Heights of the Reflecting Regions in the Troposphere
Observations upon the reflecting regions of the atmosphere show that in addition to the reflections from the E, Fl, and F, regions, occasional reflections occur from heights of 50 and 25 (circa)
Measuring the Reflecting Regions in the Troposphere
During the routine investigation of the E and F regions of the ionosphere, it was found that the supposed ground wave was undergoing severe fluctuations. This phenomenon pointed to reflections from
Cyclones, Anticyclones, and the Kennelly-Heaviside Layer
  • R. C. Colwell
  • Physics
    Proceedings of the Institute of Radio Engineers
  • 1 May 1933
Fading curves taken in Morgantown upon the signal of KDKA in Pittsburgh show an increase of intensity after nightfall provided a cyclonic area covers both cities or lies to the north of Morgantown.
The D Region of the Ionosphere
DURING the last ten years, investigations based upon the mathematical theories of Eccles and Larmor have given considerable information regarding the reflecting layers of the atmosphere. The most
TROPOSPHERIC RADIO WAVE REFLECTIONS.
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