322 Mr Redfield's Observations on the 



No. IX. represents the route of a violent and extensive hur- 

 ricane, which was encountered to the nortliward 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 40 hours, and its progress appears to have 

 been more tardy 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 latitude 

 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 cha- 

 racteristics, as those which appear in the summer or autumn. 



Track No. XI. represents a portion of the general route of 

 the violent inland storm which swept over the lakes Erie and 

 Ontario on the 11th of November 1835. This storm was very 

 extensive, spreading from the sea-coast of Virginia into the 

 Canadas, to a limit at present unknown. The anterior portion 

 of this gale was but moderately felt, and its access was noted, 

 chiefly, by the direction of the wind, and the great fall of the 

 barometer ; the violence of the storm being chiefly exhibited 

 by the posterior and colder portion of the gale, as is common 

 with extensive overland storms. The regular progression of 

 this storm in an easterly direction is clearly established, by 

 facts collected by the writer, from the borders of Lake Michi- 

 gan to the Gulf of St Lawrence and the sea-coasts of New Eng- 

 land and Nova Scotia. 



We have thus given a summary description of the route of 

 twelve storms, or hurricanes, which have visited the American 

 coasts and seas, at various periods, and at different seasons of 

 the year. The lines on the chart, which represent the routes, 

 are but approximations to the centre of the track, or course, of 

 the several storms ; and the gales are to be considered as ex- 

 tending their rotative circuit from 50 to 300 miles, or more, 

 on each side of the delineations ; the superficial extent of the 



