Hurricanes and Storms of the West Indies, dfc. 319 



visited St Martin's and St Thomas''s on the 18th ; passed the 

 north-east coast of Hayti on the 19th ; Turks' Island on the 

 20th ; the Bahamas on the 21st and 22d ; was encountered off 

 the coast of Florida and South Carolina on the 23d and 24th ; 

 off Cape Hatterass on the 25th ; off the Delaware on the 26th ; 

 off Nantucket on the 27th ; and off Sable Island, and the Por- 

 poise Bank, on the 28th. Its ascertained course and progress 

 is nearly 3000 miles,* in about eleven days ; or at the average 

 rate of about eleven miles an hour. The direction of its route 

 before crossing the tropic, may be set down at N. 61° W., and 

 in lat. 40° while moving eastward, of N. 58° E. 



Track No, IV. is that of the extensive hurricane of Septem- 

 ber 1804. It swept over the Windward Islands on the 3d of 

 that month ; the Virgin Islands and Porto Rico on the 4th ; 

 Turks' Island on the 5th ; the Bahamas and Gulf of Florida 

 on the 6th ; the coast of Georgia and the Carolinas of the 7th ; 

 the great bays of Chesapeake and Delaware, and the contigu- 

 ous portions of Virginia, Maryland, and New Jersey, on the 

 8th ; and the states of Massachussetts, New Hampshire and 

 Maine on the 9th ; being on the highlands of New Hampshire, a 

 violent snow-storm. The destructive action of this storm was 

 widely extended on both sides of the track indicated upon the 

 chart, and the same fact pertains, in a greater or less degree, 

 to the other storms herein mentioned. It appears to have 

 passed from Martinico, and the other Windward Islands, to 

 Boston in Massachusetts, by the usual curvilinear route in 

 about six days ; a distance of more than 2200 miles, at an ave- 

 rage progress of about 15g miles per hour. 



ing in its dimensions and sphere of action, which is shewn by its increasing 

 duration as it proceeded westward, as well as by other evidence. 



It is perhaps worthy of notice, tha' the peculiar aspect of our atmosphere, 

 together with the unusual colour and appearance of the sun, which excited so 

 much attention a few weeks ago, was exhibited a few days after the occur- 

 rence of the hurricane at Barbadoes ; and at Mobile and New Orleans, was 

 the immediate precursor of the storm. 



N. B. — To the list of localities in which the second hurricane of August 

 1830, exhibited its violence, as published in the Journal of Science, that of 

 Martinico may be prefixed ; at which island the southern margin of that 

 storm shewed itself on the night of the I9th-20th of that month. 



* All the distances are expressed in nautical miles. 



Y 2 



