240 PHILOSOPHY OF STORMS. 



alous arrows in this storm, are the Penelope and Wilming- 

 ton on the N., which seem to favor the idea of a rotation of 

 the air from right to left, and the Westchester on the east, 

 which seems to indicate a rotation from left to right. This 

 is in conformity with phenomena accompanying storms pre- 

 viously investigated by the Committee, (see article 100, also 

 116, Rationale) and it is in exact conformity with what ought 

 to take place, if the wind does blow inwards towards the 

 centre of the storm ; as will appear from the following con- 

 siderations. When the air rises in the centre of the storm, 

 and expands by the evolution of the caloric of elasticity 

 given out in the formation of cloud, upwards of six thou- 

 sand cubic feet for every cubic foot of water generated in 

 the cloud, as explained before, it must spread out in an an- 

 nulus all round the borders of the storm, and cause the ba- 

 rometer to rise, in that annulus, above the mean, just as it 

 did in this storm to the Rawlins, the Sophia, and West In- 

 dian, (Turner) as the storm was approaching their vessels, 

 and as it is now known to do in all our great N. E. storms 

 that come from the S. W. If a storm should spring up in 

 our neighborhood, that is, commence in our vicinity, and 

 not come upon us from a distance, such a rise of the ba- 

 rometer could not take place. Now this rise above the 

 mean will evidently take place in front of the storm, because 

 the upper current of air is moving in that direction, and 

 of course the great body of the up-moving column of air in 

 the middle parts of the storm will be pressed by the upper 

 current in that direction. And it is manifest, that beyond 

 the annulus where the barometer stands ^above the mean, 

 the air will blow outwards from the storm, and within the 

 annulus, it will blow inwards. But as in front of the storm, 

 there is one point of the annulus where the barometer stands 

 higher than in any other, the wind will tend in all directions 

 from that point, and of course it will cause the wind, in the 

 very borders of the storm, to appear to rotate both ways. 



