it is
evident, therefore, that if two neighbouring regions of the atmosphere
are unequally heated, this inequality of temperature will give rise to
two currents of air--a warm one, in the upper region of the
atmosphere, blowing from the warmer to the colder region; and a cold
one, near the surface of the earth, blowing from the colder to the
warmer region. It can, therefore, hardly be matter of doubt, that
great permanent currents, caused by the unequal heating of the
equatorial and polar regions, do exist in the higher strata of the
atmosphere--an inference which is supported not only by the occurrence
of the trade-winds and the monsoon, but by a variety of other facts
and observations.

'Thus, for instance, it is found that in the region of the
trade-winds, cinders from the craters of volcanoes, and other objects,
are carried through the higher regions of the air in a direction
exactly opposite to that in which the trade-wind itself is blowing
below; and in this way cinders from the Cosiguina, in Guatemala,
frequently fall in the streets of Kingston (Jamaica), lying to the
north-east of Guatemala. Similar facts have been observed at the Peak
of Teneriffe, in the Straits of Magellan, and elsewhere.

'The importance of this subject with regard to aero-locomotion can
hardly be overrated; for these currents, when clearly ascertained and
correctly mapped out, would constitute so many great natural routes,
where the aeronaut would be borne onward in the required direction
with immense velocity, and without danger of encountering squalls or
counter-currents.

'But here, fearful of exhausting the patience of our readers, we bring
our somewhat lengthened disquisitions to a close, and take our leave
for the present of the tempting, though debatable ground of the CUBIC
HIGHWAY.'

A MEMOIR FOR THE MILLION.

On the meeting-line between a moorland and lowland district of
Perthshire, stands an old baronial seat, dignified with the name of
castle, to which, no doubt, it was entitled long after the date of its
erection, in the fifteenth century, although no longer boasting of
either the strength or magnificence which such a name implies. Its
position, however, is picturesque--standing on the bank of a romantic
and finely-wooded Highland glen, and commanding a view on one side of
a mountain-range, and on the other of a cultivated country, with its
towns and villages in the distance. The mansion is flanked on one side
b