quarter, which, having swept the western coast of South America,
_extends across the equator to the vicinity of Panama_, thus meeting,
and commonly over-sliding the above-mentioned westerly winds, and
tending to a deflection or rotation of the same, from right to left.
As this influence may thus become extended to the Caribbean or
Honduras Sea, we have, next, the upper or S. E. trade of this sea,
which is here frequently a surface-wind, and must tend to aid and
quicken the gyrative movement, ascribed to the two previous winds;
and lastly we have the N. E. or lower trade, from the tropic, which,
coinciding with the northern front of the gyration, serves still
further to promote the revolving movement which may thus result from
the partial coalescence of these great winds of Central America, and
the contiguous seas.

"Thus, while a great storm is, in part, on the Pacific Ocean, its N.
E. wind may be felt in great force on that side of the continent,
through the great gorges or depressions near the bays of Papagayo or
Tehuantepec, as noticed by Humboldt, Captain Basil Hall, and others,
the elevations which there separate the two seas being but
inconsiderable; and, when the gyration is once perfected, the whole
mass will gradually assume the movement of the predominant current,
which is generally the higher one, and will move off with it,
integrally, as we see in the cases of the vortices, which are
successively found in particular portions of a stream, where subject
to disturbing influences."

The analogy between this and the theory of Professor Dove, cited above,
and prior, in point of time, is obvious. They are substantially alike in
principle, with different locations. They differ also in this, Professor
Dove appears to think something more than over-sliding necessary, and
assigns the duty of crowding the upper current down in to the lower, to
make an _encounter_, to a lateral overflow from Africa. Mr. Redfield seems
to think there may be a tendency to deflection when they "over-slide" each
other. They are both closet hypotheses, the poetry of meteorology, with
something more than poetical license as to facts.

In the first place, _no such concurring winds exist in the same locality
at the same time_. When the inter-tropical belt of rains is over Central
America and Southern Mexico, a S. W. monsoon blows