[22] Hum. Cosmos, art Aerolites.
[23] We shall in all cases use this abbreviation for the extremely
awkward word zodiacal.
[24] It is here assumed, that all the vortices are at their apogee at
the same time, and, consequently, they lie in different longitudes, but
the central being between, its position is taken for the average
position of the three.
[25] It is far from improbable that the effect produced in one zone of
climate, may be reversed in another, from the nature of the cause.
[26] That the 11th, 12th, and 13th of May should recede 2d in
temperature as determined by Maedler from observations of 86 years, at a
time when the power of the sun so rapidly augments, is strongly
confirmatory of the theory. See _Cosmos_, p. 121.
[27] Plucker first discovered that a plate of tourmaline suspended with
its axis vertical, set axial.
[28] Silliman's Journal for March and April, 1853.
[29] Humboldt, _Cosmos_ p. 193, London ed.
[30] See Silliman's Journal for September, 1853.
[31] See Silliman's Journal for September, 1853.
[32] This was the central vortex ascending.
[33] Reid's Law of Storms, p. 350.
[34] Humboldt, _Cosmos_, p. 203.