176 Phenomena of the Cuba Hurricane. 
extended character than is often obtained, and is, therefore, well 
suited to remove doubts from those who are unaccustomed. to a 
course of specific inquiries. To such, the proofs of rotation 
afforded by a direct inspection of simultaneous observations, when 
plotted on a map, may be more satisfactory. This case is also a 
favorable one for the study of navigators ; who must necessarily 
become acquainted with the progressive character and determinate 
changes of revolving gales, or submit to the inevitable evils: of 
neglecting such knowledge. 
For these objects, it proves favorable that the unusually rapid 
progress of this hurricane was such as to enable us to show, on - 
the same chart, a separate development of the daily advance of 
the storm, and the simultaneous direction of its wind on all sides 
at the same hour, on successive days. This is first done on Chart 
IV, where the place of the storm at noon of each day, as ap- 
proximately determined, is denoted by oe sets of concentric 
the course of that month. This unexpected result, as made apparent also in other 
storms, was made known without reserve to the writer's friends and others, but 
was not published in any Journal till April of 1831, when the westerly progression 
in low latitudes was also distinctly shown. It was not till seven years later (1838) 
that I became acquainted with the suggestions and opinions of Col. Carrer, and 
with the particular views and elucidations published a Prof. Dove in his paper on 
Barometric Minima, found in Poceennorr’s Annalen, 18 
To the valuable investigations of Prof. Doves, [ a anxious to FA full justice. 
But I have found some degree of difficulty i in sacutnicine the extent in which his 
elucidations and views of certain storm-winds, as exhibited in his article above 
mentioned, sous with the main results of my separate inquiries; a difficult 
which perhaps may be owing chielly to my want of acquaintance with the German 
“ti be and with the modes of illustration used at that time by this distinguished 
inquir 
It is evils that the eget rotation of the trade and general winds in perform- 
ing their great circuits, both in the northern and southern hemis ispheres, is in the 
direction which is opposite aad reverse to that which is uniformly found in the re- 
yolving storms or eddies which are carried forward in these general currents of ro-" 
tation. Thus the great rotative and geographical course of the latter, in the north- 
ern hemisphere, is — ively from S,, W., N.,E.,S.; while the rotation of a 
storm, borne along by this current, proceeds slenebbeetie from S., E., N., W., 8.5 
fen the opposite Meets of rotation. At the same time, the constant tendency 
of the difference of velocity in the earth’s rotation, in different latitudes, is to"favor 
‘or produce, locally, such leftwise movements of rotation as the storms exhibit in 
influences of rotation which may exist in greater or less force in various regions. 
bic _ow ms; m be counteracted in the 0 
