Additional Ohjeciio?is to Redfield's Theory of Storms. 133 



northeaster brings in a crowd of vessels having only to complain 

 of the violence not of the direction of the wind. 



71. It has been assumed, that a storm whirling to the left and 

 travelling northeasterly, must, at stations passing nearly under 

 the centre, first blow as a southeaster and afterwards gradually 

 change to a northwester. Meanwhile on the southeastern or left 

 limb it will blow only from the southwest, and on the north- 

 western or right limb it will blow only from the northwest. Con- 

 sistently, when the storm travels from southeast to northwest, as 

 hurricanes. are represented to travel in proceeding from the sphere 

 of their origin in the West Indies to the coast of North America, 

 it will at stations within a certain distance of a line described by 

 the centre, blow from the northeast first. On the southwestern 

 limb it will blow first as a northwester ; on the northeastern limb 

 as a southeaster. Moreover, that on the last mentioned limb the 

 greatest violence will occur, since the general motion of the whirl- 

 wind will there cooperate with that of the whirl. Yet in the 

 following paragraph Mr. Redfield informs us, (this Journal, Vol. 

 XXV, p. 128,) that " In the West hidies, hurricanes begin to blow 

 from a northern quarter of the horizon^ and then changing to 

 west and round to a southern quarter and then their fury is over."" 



72. This account of the direction of the wind in West India 

 hurricanes agrees with that quoted by Espy from Edwards's His- 

 tory of Jamaica, Vol. 3d : " All hurricanes begin from the north, 

 veer back to west-northioest, west, and south-southwest, arid when 

 got to southeast, the foul weather breaks up.^'' 



73. It must be evident, as stated among my " objections,''^ that 

 when a whirl is first originated, whether it describe a helix, as 

 would result from its progressive circular motio?i, or a circle, as 

 re-presented by Mr. Redfield in his charts,* it must at thirty two 

 stations equidistant from each other and the centre of gyration, 

 blow from as many points of the compass. However, when once 

 under way, it being granted that the whirling is always from right 

 to left, evidently at any station near the line described by the 

 centre, it will begin to blow at right angles to that line or from 

 the northeast. As the centre advances this wind would gradually 

 subside, and, after the centre should have gone by, it would be- 

 gin to blow from the southwest with increasing force till the se- 



* Franklin Journal, Vol. 19, p. 120. 



