132 Additional Objections to. Redfield’s Theory of Storms. 
severe part was from one hundred and fifty to two hundred and. 
fifty miles. Thus it may be assumed, that in order for an ob- 
server to be exposed successively within the severe portion on the 
southeastern and northwestern limbs, the storm would have had 
to move at least one hundred miles, requiring nearly four hours. 
Hence if the storm in question ‘were a whirlwind, instead of the 
change having been sudden, several hours would have been re- 
quired for its gradual accomplishment. 
_ 68. 'To prove therefore that a sudden change ensued from one 
violent wind to another of the same,character blowing in an op- 
posite direction, is to demonstrate that the storm in which it took 
P was. not an extensive whirlwind. Yet this characteristic 
is universally admitted to belong to hurricanes, and especially to 
those upon our territory in which a southeaster is followed by a 
northwester. Hence the seaman’s saying which Mr. Redfield 
sanctions in quoting, “a northwester does not remain long in debt 
to a southeaster. 
69. But if the storm. cee alluded to eds from iewsbinitnt 
to northeast as Mr. Redfield’s doctrine requires, and the velocity 
of the wind on the southeastern and northwestern limbs of the 
whirl were as great as described, that on the southwestern: side 
must have been more than a fourth more violent, having the 
general motion of the storm, superadded to its appropriate gy- 
rating velocity. Yet there is no evidence that any such supe- 
riority existed. On the contrary the violence of the southeaster 
and northwester seems to have been preéminently the object of 
attention. 
70. Agreeably to Mr. Redfield, hurricanes have a diameter va- 
rying from one mile to five hundred miles, the diameter of the 
severe part of the storm of August, 1830, being from one hundred 
and fifty to two hundred and fifty miles. © Of course a portion of 
the eastern as well as the western limb of sucha storm might be 
comprised between the Alleghany mountains and the Atlantic 
shore ;. and in no case would the inner portion of the southeast- 
tmmensieiore violent limb be beyond the cognizance of our mer- 
chants and insurers. It would be a matter of course that’in-ev- 
ery violent northeast gale, aiding as Tepresented from the pro- 
long t, fears would be 
oreccinn af 4 
o 
entertained lest vessels, inward bound, should be met bya much 
iit: coun But experience shews, that every | 
