134 Additional Objections to Redfield’s Theory of Storms. 
vere part of the southeastern limb should be passed. On this part 
of the track only one change would take place. - But at two sta- 
tions sufficiently remote from the central line, the wind in passing 
from northeast to southeast would undergo an intermediate devi- 
ation, but necessarily of an opposite nature, since for the same 
reason that at one, there would be first more northing and then 
more westing, at the other, there would be more easting and more 
southing, pari passu. But on the outward northeastern and north- 
western limbs, or in other words, on the right and on the left 
external borders, there would be no change. On the one it would 
blow from the northwest only, on the other only from the south- 
east. On this last mentioned limb the blast would be preéminent 
in violence, since in that direction the Syraline and sade 
— the whirlwind would concur. 
74. Nevertheless, agreeably to the. observations’ which sae 
lifted the whirlwind theory above the reach of my strictures, hur- 
ricanes in the West Indies begin (ad every place) from a northern 
quarter, and changing first west, and afterwards.to a southern 
quarter, terminate their fury. “Thus, agreeably to the evidence 
of Mr. Redfield, the fury of the hurricane is the least. oneal 
cording to his hypothesis, it should be the greatest. _ 
75. Having cited and endeavored to shew the sdlionn of the 
only explanation which can be found in Mr. Redfield’s essays.of 
the mode in which whirlwinds are induced, I will quote a pas- 
sage from which it would seem that they are supposed capable 
of being self-induced. Whence.it would follow, that while:free 
from any external cause, his “rotary movement, which is the sole 
cause of destructive winds and tempests,” could spontaneously; 
excite itself and the adjoining elements into a destructive com- 
motion. From this statement, it appears'that the author was not 
aware that in making it he gave a blow to his favorite idea of op- 
posing and unequal forces, arising from gravitation and. terrestrial 
motion, being the cause of plormny: atmospheric: erreiion: 
76. “We may observe, also, th spouts appear 
to commence gradually and to acquire their full achivity without 
the aid of any foreign causes; and it is well known they are 
most frequent in those calm regions where apparently there are 
no active currents to meet each other, and they are least frequent 
where currends are an __ =_— # — Journal, Vol. xxx, 
ee cele 
