250 OBSERVATIONS ON THE WINDS. 



9th ; being on the high lands 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 Martinique 

 and the other Windward Islands to Boston, by the usual curvilinear route, in about 

 six days, a distance of more than 2,200 miles, at an average progress of about 15^ 

 miles an hour. 



Track No. V. The route of the Hurricane which ravaged Antigua, Nevis, and 

 St. Kitt's, in the afternoon and night of August 12th, 1835 ; St. Thomas, St. Croix, 

 and Porto Rico, on the 13th ; Hayti and Turks Islands on the 14th ; the vicinity 

 of Matanzas and Havana on the 15th ; was encountered off the Tortugas, on the 

 Bank of Florida, on the 16th ; in lat. 27° 21', long. 94°, and other points, on the 

 17th and 18th ; and at Matamoras, near the Mexican shore, lat. 26^ 4', on the 

 18th, where it was most violent during the succeeding night. It also passed over 

 Galveston Bay, in Texas, and there blew with violence from the S.E. ; while at 

 the mouths of the Mississippi and along the Northern shores of the gulf, the gale 

 was not felt. This storm is remarkable, as moving more directly and farther to 

 the West than is usual for storms which pass near the West Indian Islands, it 

 having reached the Mexican shores before commencing its sweep to the North- 

 ward. Course about N. 73° W. ; progress more than 2,200 miles in six days; 

 nearly equal to 15^ miles an hour. 



IVuck No. VI. The memorable gale of August, 1830, described hereafter, which, 

 passing close by the Windward Islands, visited St. Thomas on the 12th, was near 

 Turks Islands on the 13th ; at the Bahamas on the 14th ; Eastern coast of Florida 

 on the 15th ; coasts of Georgia and the Carolinas on the 16th ; off Virginia, Mary- 

 land, New Jersey, and New York, on the 17th ; off George's Bank and Cape Sable 

 on the 18th ; and over the Newfomidland Bank on the 19th ; having occupied 

 about seven days in its ascertained course from near the Windward Islands, a 

 distance of more than 3,000 miles ; the rate of its progress being equal to 18 miles 

 an hour. If, adds Mr. Eedfield, we suppose the actual velocity of the wind, in its 

 rotatory movement, to be five times greater than this rate of progress, which is 

 not beyond the known velocity of such winds, it will be found equal, in this 

 period, to a rectilinear course of 15,000 miles. The same remark applies, in sub- 

 stance, to aU the storms which are now passing under review. 



Track No. VII. This storm was encountered to the Northward of the Caribbee 

 Islands on September 22nd, 1830; its route was to the Eastward of all those pre- 

 viously described, and was found on the Grand Bank of Newfoundland, October 

 2nd, having caused great damage and destruction, on its widely-extended track, to 

 the many vessels which fell in its way. The ascertained route may be estimated 

 at 1,800 miles, and the average progress 25 miles an hour. 



Ti-ack No. VIII. Experienced in September, 1821, as more fullj' shown here- 

 after, this Hm-ricane was extremely violent : it was encountered to the North- 

 Eastward of Turks Islands, on the 1st of the month ; to the Northward of the 

 Bahamas and near the latitude of 30° on the 2nd ; on the coast of the Carolinas 

 early in the morning of the 3rd; and from thence, in the com-se of that day, along 

 the coast of New York and Long Island ; and it is represented to have continued 

 its course across the States of Connecticut, Massachusetts, New Hampshire, and 

 Maine. The diameter of the storm appears to have exceeded 100 miles; its 

 ascertained route and progress about 1,800 miles in sixty hours, equal to 30 miles 

 an hour. 



A similar hut less violent storm swept along the same portion of the coast of the 

 United States on April 28th, 1835, 



Track No. IX. The route of a violent and extensive Hurricane, which was en- 

 countered to the Northward of Turks Islands, August 22nd, 1830; Northward of 

 the Bahamas on the 23rd ; and off Die coast of the United States on the 24th, 



