SINCE the general occurrence of transient radio reflexions the E region of the ionosphere, at frequencie exceeding the critical frequencies for normal or abnormal E layers, was noticed by Sir Edwam ...
Astronomers used to think that only good-sized meteorites reach the earth intact, while the smaller ones “burn” to vapor on passing through the atmosphere. But Dr. H. E. Landsberg at the U.S. Weather ...
SEVERAL papers describing British observations of the Giacobinid meteor shower, 1946, were presented at a meeting of the Royal Astronomical Society on December 13, 1946. Special interest was attached ...
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