Other meanings of America:
See also naming of America for information about how the continents were named.
Editor's note: The terms "United States of America", "USA", or "US" are preferred instead of America to avoid confusion.
This is a disambiguation page; that is, one that just points to other pages that might otherwise have the same name. If you followed a link here, you might want to go back and fix that link to point to the appropriate specific page.
Every now and then the changes in the
occur regularly every day. The needle may move back and forth in a
cause. Such movements of the needle are commonly seen when there
and an aurora must be due to the same or some connected causes.
Those of us who are acquainted with astronomical matters know that
change, having a period of eleven years and one or two months.
storms are recorded and compared, it is found that they correspond
years. The conclusion seems almost inevitable: magnetic storms are
same cause that produces the spots. This emanation does not go on
other on the earth. What is it? Every attempt to detect it has
in operation from time to time, for several years, his ingenious
the spectrum. This instrument shows that violent actions are going
suspect. But it has failed to show with certainty any peculiar
with such a storm.
A mystery which seems yet more impenetrable is associated with the
offer to our sight the most astounding phenomena ever presented to
offered no mystery. There was no reason to suppose that.