; be os a rae a nan a Cte 
/Rotative Character of the Storm. 175 
T'ue Parapox or Revorvine Winps.—It is still possible that 
some persons may not be able to understand, clearly, how the 
wind in a progressive storm which revolves in one constant di- 
rection around its axis, can at the same time be found to veer in 
opposite directions, on the opposite sides of the axis line, as is 
seen in Tables J. and Til. respectively. But this fact, of which 
an explanation has already been attempted, may be seen to be a 
necessary result of the law of rotation, as manifested in all revol- 
ving bodies; and failing to understand this law, no one can in- 
telligently pursue the inquiry. 
Let a circular disk of stiff paper be written upon in one or 
more circular lines, around its center, either in a concentric or 
vorticose form ; then put this disk in rotation upon its center, and 
pass two fingers across it in parallel directions, one on each side 
of the axis, and it will be found that one finger passes the circu- 
lar writing in the order in which the words are written, while on 
the opposite side of the axis the other finger, though moving in 
the same direction, will pass over the writing im the opposite or 
reverse order to that in which the words are written. Of course 
this will equally follow in case the revolving disk be advanced 
under the fingers, as when the fingers are advanced over the disk. 
The two opposite orders of succession in which the letters 
are thus presented on the revolving disk, are equivalent to those 
of the winds which are presented to separate observers on the two 
opposite sides of the storm. 'This then being the law of rotation, 
it follows, that if the general course pursued by a storm be known, 
two rough observations of the order of changes in the wind, one 
on each side of its axis path, may be quite sufficient to determine 
its revolving character ; provided that the early and later winds 
near the axis path have blown transversely to the course of pro- 
gression ; to determine which, even the same observations may 
suffice. | 
-Proor or Rorarion arrorpED By prrecr IyspEcTion.—Per- 
haps it may be deemed that the rotation of great storms, as a 
question of fact, resting on observations, was as distinctly deter- 
mined in the case of the American storm of Sept. 3d, 1821, or 
that of August 16th, 1830, as by the great case which is now 
before us,* But the latter affords data of a more precise and 
* The jointly revolving and progressive movement of the entire storm which 
visited Connecticut on the 3d day of September, 1821, was distinctly ascertained in 
