126 On the Gales and Hurricanes of the Western Atlantic. 
hurricane of October 3d, 1780. The ascertained route may be es- 
timated at eighteen hundred miles, and the average progress of the 
storm at twenty five miles an hour. 
Route No. VIII, is that of a much smaller, but extremely vio- 
lent hurricane, which was encountered off Turks’ Island on the Ist 
of Sept., 1821; to the northward of the Bahamas and near the lat. 
of 30° on the 2d; on the coast of the Carolinas early in the morning 
of the 3d; and from thence, in the course of that day, along the sea- 
coast to New York and Long Island; and which, on the night fol- 
lowing, continued its course across the states of Connecticut, Massa- 
chusetts, New-Hampshire, and Maine. I am not in possession of 
accounts by which its farther progress can be successfully traced.* 
The diameter of this storm appears to have greatly exceeded one 
hundred miles ; its ascertained route, and progress is about eighteen 
hundred miles, in sixty hours; equal to thirty miles an hour. 
The last mentioned route may also be considered to be nearly the 
same as that of a similar, but less violent storm, which swept along 
the same portion of the coast of the United States on the 28th of 
April, 1835. 
No. IX, represents the route of a violent and extensive hurri- 
cane, which was encountered to the northward of Turks’ Island on 
the 22d of August, 1830; northward of the Bahamas on the 23d; 
and off the coast of the United States on the 24th, 25th, and 26th 
of the same month. 
Much damage was done on the ocean by this storm; but it scarcely 
reached the American shores. Its duration off this coast, was about 
forty hours, and its progress appears to have been more re than 
that of some other storms. 
No. X, represents the track of a violent hurricane and snow-storm, 
which swept along the American coast from the lat. of 30° N. on 
the 5th and 6th of December, 1830. 
_ The last mentioned track also corresponds to that of another storm, 
of like character, which swept along the sea-coast on the 13th, 14th, 
and 15th of January, 1831. These violent winter storms exhibit 
nearly the same phases of wind and general augers as those 
which appear in the summer and autumn. 
Track No. XI, represents a portion of the general route of the 
violent inland storm which swept over the lakes Erie and Ontario 
* The phenomena and progress of this storm have been more fully noticed in - 
Silliman’s Journal, Vol. xx. pp. 24—27. 
