terminus, in the town of New Harmony, and gradually
curving northeast, until the road pursues a due east course to
Evansville. There is, however, a branch road of about half a mile, which
starts from the Wabash River, at a _west_ terminus, and runs due east
to join the other, near where that main track commences its northeast
curve. The results (more readily understood by an inspection of the
diagram) were as follows:
1. At the south terminus of the railroad, the rails on the east side of
the track as well as those on the west side attracted at their south
ends the marked end of a small magnetic needle, both at the upper and
lower flange; the usual vertical induction being in this case overcome
by the greater lateral induction. Whenever, on progressing north, the
rails were at least about two inches apart, the upper flange of the
north end of any rail would attract the unmarked, while the south end
of its neighbor or any other of the north and south laid rails would
attract the marked end.
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