12 Cape Verde and Hatteras Hurricane. 
Thus we have an estimated distance of 7276 miles, traversed 
by the storm in about twelve days: at an average rate of progres- 
sion of nearly 26 miles an hour. 
e slower rate of progression at and near the axis or belt of 
equal diurnal motion, accords with results ascertained in my pre- 
vious inquiries, and with those severally shown by Rem, Tom, 
and Pippineron, in the gales of the Southern Ocean and the 
Asiatic Seas. 
In my approximated delineation of the axis line or center-path 
on the Chart, I have had reference to the path of greatest vio- 
lence, where observations were had from both sides, and espe- 
cially to the opposite veering of the wind, which is found in the 
opposite sides of an advancing cyclone. Northeastward of Cape 
Hatteras, we find the storm-center to have passed between the 
Georgia (20) and the Swan (25) on one hand, and the Addy 
Swift (27) on the other. 
The incurvation of the storm-path toward the Azores is quite 
remarkable. ‘This feature I first noticed in the case of the storm 
of Sept. 1846, as shown by observations extending to lat. 62° 30, 
far beyond the limits of my former map, on which its track 
(x1x) was first delineated. This tracing, with that of the hurri- 
cane of August 1851, (xxi) has been copied on this Chart, and 
extended without further alteration. The number and extent of 
the reports obtained in the present case, have induced me to de- 
lineate this feature more fully than I first intended. Its probable 
relation to the expansion and perhaps the falling off of the south- 
ern portion of the cyclone toward the equator, may be considered 
hereafter. 
Bastward of the Grand Bank, nearly all the reports are from 
the right side of the storm-path, and so far as appears, mostly at 
great distance from the true axis path of the gale. This may be 
owing to the diminished violence of the two left quadrants of the 
cyclone, caused by its accelerated progression, as wel 
paucity of reports from the more northern portions of the Atlan- 
tic, which are less frequented by navigators. That the cyclonic 
ities. 
it as r e movements in the upper atmosphere, in regions higher than 
the limits first mentioned, almost nothin ears to have been yet learned; al- 
t inferences, ur, with great confidence, have been sufficiently common. 
= a may be as Mand as : = ypotheses on whic spac are founded ; 
seldom appear reconcilable with visible phenomena, if these be widely and care- 
fally camldaeed Sf 
