Effect of Rotation on the Barometer. 315 
This table is taken from a fuller one, so as to suit the di- 
mensions of the printed page; and the field of observation will 
be seen to comprise a breadth of thirteen hundred and fifty miles 
on the left side of the axis path of the hurricane. An approxi- 
mate correction has been made for the known or supposed eleva- 
tion of the stations in the interior, at the assumed rate of one 
tenth of an inch of mercury for ninety feet. 'The places stand 
in the order of distance from the axis line, beginning with the 
Most remote; and the order of succession in the storm’s course, 
parallel to this line, is indicated by the numbers affixed in the first 
column. As there is room for but two daily observations, those 
of the military posts are given for 9 a.m. and 9p. m., as divid- 
ing the time into equal periods, and in other reports the times 
nearest to these hours are taken. The Toronto observations, 
only, are reduced for temperature to 32° F 
The observations made at Bermuda, Newfoundland, and on 
board the Trent, (2c) at Vera Cruz, and the Prince Albert, (164) 
in lon. 38° 30’, (the latter being six hundred and filty miles to 
the right of the axis line, ) should also be included with those in 
the table.* Our barometrical survey is thus extended to two 
thousand miles, laterally to the path of the hurricane, and over 
a. than thirty degrees of latitude, and fifty-six degrees of 
ude. 
During the progress of the two associated Cuba storms they 
are seen to have been immediately preceded, over this vast field, 
by a barometric wave or accumulation of pressure, rising above 
the usual or annual mean. An approach to this condition 1s ion 
Drea ee 
* The observations at St. John’s, Newfoundland, are entitled to an additive cor- 
Tection of 16 in. for 140 feet of elevation. The elevation of the barometer at Ber- 
muda is not known: but another barometer, observed by an officer at the naval 
Station, ranged from ‘30-46, on the Ist of October, to 30-07 on the 4th. Winds 
8.8. E. veering to W. S. W. on the 4th and 5th; and 8. 8. E. veering to W. on 
the 6th aud 7th. 
: importance of establishing a station for 
muda, like those which have been instituted Fea Alara cbarecte 
