Great Expansion of the Storm. 13 
extended beyond lat. 60°, in the general direction of the Feroe 
Islands, and the main entrance to the Arctic Sea. 
n other cases we find, that after passing the latitude of Ber- 
muda, the expansion of the storms is often so great that their 
southern portions advance nearly from west to east; but reach 
the successive meridians no sooner, and sometimes even later 
than the axial portion of the gale, which pursues a more north- 
easterly course. ‘Thus in the present case, east of lon. 60°, and 
between lat. 35° 30’ and lat. 42° 30’, a belt of seven degrees, we 
have a series of thirteen observations, carrying us east to lon. 
15° 25’, in lat. 36° 50’; almost to the southwestern extremity of 
Europe. See reports 43, 44, 46, 47, 49, 51, 56, (including Juno, ) 
62, 63, 64, 91, 92. If, instead of the broad range of our present 
inquiry, we were limited, as in the United States, to fewer paral- 
lels of the temperate latitudes, how readily might an east pro- 
gression of the storm be shown, by these partial observations, and 
its true course remain unnoticed. 
ut I apprehend this southward expansion of the storm to 
have been due to something more than the centrifugal force of 
the cyclone, acting against the statical pressure of the circumja- 
cent atmosphere. In such a wide-spread cyclone, whose diame- 
ter on the 9th of September extended from Newfoundland,* to 
beyond the Azores, or more than 1500 miles, how could its vast 
entireness be much longer maintained, against both the centrifu- 
gal and gravitating forces of the earth, acting in opposite direc- 
tions, and with opposite degrees of effect, or predominance, on 
the sides respectively nearest the equator and the pole?) May we 
Not suppose that the southern portion of the gale was in process 
of separation or falling off toward the equator, and thus supply- 
ing the influx which sustains the inferior trade winds in north- 
western Africa and the eastern Atlantic? And is not such a view 
she had fine weather, left Gibralter Sept. 11th, and encountered 
Strong gales from N. E. with heavy sea; arriving at Southampton 
On the 18th ;—thus showing a brisk movement of the winds, at 
this period, toward Madeira and the lower latitudes.t 
* * * = s *. 
h the ki Dinwiddie, 1am in possession of observations 
Made at Sas rege we ‘Bay, x. Pots 47° 40’, lon. 53° 1 6’, which show 
rans - left margin of the storm touched that place Sept. 9th, with a stiff wind 
m NV. E. and ] dy i 
t Taking into-view ibe greatly diminished force of this gale at the entrance of the 
English Channel, and that we have no notice of its action in the Bay of Biscay, 
while we trace its violence continuously from off Cape Hatteras to the Rockall Bank 
and veqond lat. 60° on one hand, and to lat. 36° 50’ and lon. 15° 25’ on the other, 
with the characteristics of a severe gale, I confess that some so like the 
