Dr. Hare on the Law of Storms, 95 



of indisposition to give Mr. Red field unnecessary pain, that I 

 have so expressed myself as to cause his displeasure. 



Agreeably to the notice subjoined to the essay entitled * Ad- 

 ditional Objections,' published in the Number of your Journal 

 for August last, I send you a copy of my strictures on Dove's 

 Lav/ of Storms. By the next opportunity I will send another 

 communication, in which I shall advance some further proofs, 

 that if such whirlwind storms as have been imagined by Red- 

 field, Dove and others, could be created by the causes which 

 they have suggested, they could not endure, after the cessa- 

 tion of the generating forces, longer than might be requisite 

 to restore the equilibrium deranged by the centrifugal force 

 consequent to the gyration. 



I am, Gentlemen, respectfully. 



Your obedient Servant, 

 Philadelphia, February 27, 1844. RoBERT HarE. 



104. I have not been enabled to discover that Professor 

 Dove attempts to assign any cause for violent winds. As- 

 suming that a wind, sufficiently violent, is blowing from south 

 to north, he ingeniously makes a new application of the old 

 doctrine of Halley, by which the westerly motion of the trade 

 winds is ascribed to the diversity of the velocity of the earth's 

 surface, at different distances from the equator, operating upon 

 a wind blowing from one parallel of latitude to another. I 

 am however unable to understand how any difference of mo- 

 mentum, thus arising, can act throughout all parts of a circle 

 upon an elastic fluid, so as to sustain the equability of motion 

 requisite to enduring gyration. It seems to me that the influ- 

 ence of the terrestrial motion can operate harmoniously neither 

 upon each quadrant, nor each zone of a circle. The effect 

 upon the south limb cannot, I think, cooperate with that 

 upon the northern one. 



105. Moreover, as the velocities of the aeriform particles in 

 a whirlwind must be greater as they are further from their 

 axis, I do not see how a uniform force operating upon parti- 

 cles requiring such various velocities, can produce movements 

 which can harmonize in causing a non-conflicting rotation of 

 the whole mass. 



106. How can this process avail to produce a revolution in 

 the same direction in all the storms of this quarter of the 

 globe, as alleged by Mr. Redfield and sanctioned by the 

 author, when, agreeably to the most ample and satisfactory 

 evidence adduced by Professor Loomis, as well as general ex- 

 perience, some of the most violent storms of this continent 

 travel from the north-west towards the south-east ? In such 



