1. From the decay rate of the electron count, the density of the
atmosphere at great heights above the earth can be inferred, The results
so far seem to confirm the predictions that the "exosphere" is somewhat
denser than had formerly been supposed, confirming recent clues from
satellite drag data.
2. The experiment provides the first extensive experimental
evidence concerning the structure of the earth's magnetic field above
a thousand miles or so. The fact that the electrons emitted by the. shot
remained mainly confined to a layer about one hundred miles thick for
two weeks shows that even 4000 miles above the earth the magnetic
field is not unduly turbulent as some scientists had suspected.
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3. Comparison of the man-made aurorae of the ARGUS experiment
with natural ones may throw considerable light on the mechanism of
those perplexing phenomena.