Fl 
Additional Objections to Redfield’s Theory of Storms. 129 
dently irreconcilable with that of a withdrawal of air from the 
centre, agreeably to one of the esa gh one above 
cited. 
57. Nor are the following observations more satuieliseeks «Due 
ring the passage of these eddies or storms over the place of obser- 
vation the barometer sinks while under their first or more advan- 
ced portions and rises as they pass over or recede.” (‘This Journal, 
Vol. xxv, p. 129.) ‘“ The barometer, whether in higher or lower 
latitudes, always sinks while under the first portion or moiety 
on every part of its track excepting perhaps its extreme northern 
margin.” ‘The mercury in the barometer always rises again 
during the last portion of the gale and commonly attains the 
mazimum of its elevation on the entire departure of the storm.” 
. 58. But if “a higher state of the barometer be created around 
the exterior border of a whirlwind than at the centre,’ and if of 
necessity the exterior border be first encountered, how does it. 
happen that precisely about this space, agreeably to the statement 
last quoted, the barometrical column should sink? And if, agree- 
ably to the statement quoted previously, the air be rarefied about 
the centre and accumulated towards the border, in passing from 
the one border to the other through the~ centre, would not the 
mercury in the barometer first rise, then sink, and afterwards rise 
again, instead of falling during its exposure to one moiety of the 
storm, and rising during exposure to the other ? 
- 69. Tt may be presumed, that respecting the state of siealin 
rometer ian the movement of the air, within the sphere of his 
whirlwinds, Mr. Redfield’s views are not in accordance with any 
settled notions. His theory leads to the idea of a centrifugal force, 
rarefying and removing the air from the centre; while’ aol obser- 
vation of the ascending current in t o create 
‘an opposite impression. 
. 60. Considering the inconsistencies of Mr. Redfield’s “reliable 
‘Guets? and. observations,” I hope I may be allowed to show what 
ought to ensue according to his own premises. Evidently ina 
whirlwind, constituted as are those to which we have reference, 
the centrifugal. force will cause an accumulation of air towards 
the exterior until the otherwise uncounteracted pressure of the 
accumulation, tending to restore the level, is in equilibrio with 
the centrifugal force. Moreover, the reaction of the fluid lying 
‘in the same plane beyond the whirl, ~ sa cause the fluid to be 
Vol. x11, No. 1.—April-June, 1842. 17 
