270 Meteorological Observations at Hudson, Ohio. 
Date. Barometer. Oscillation. 
1843, Jan... 8, 9 «.M. : 
ee ut a 28-686 ‘Al7 in 6 hours. 
. . 9,9 a.M. 29°014 ‘745 in 24 hours. 
“* 6 Feb. ..10, 9. a.m 28°812 ; 
‘“ rT; ] : 94 P. M. 28-097* *715 in 124 hours. 
“ March 27,9 a.m 28-728 
“ tc 28, 73 A. M. 27-841 ‘887 in 23 hours. 
" a 28, 9 aM. 27°848 : 
‘“c (a3 29, 9 AM. 98-794 ‘946 in 24 hours. 
1844, Jan. 12, 9 a.m. 28:692 : 
i xe © iN AO.” 96070 a: “6P8i8 1S hours 
s .Deei ‘F926 28-345 ‘ 
& ‘6 8. 9.sa'e. 29/117 -772 in 24 hours. 
1845, Jan. 13, 9 a.m. 28'218 ‘ 
“ ; 6c 14, 0.) Ku, 28-922 ‘704 in 24 hours. 
. n 17, 3 P.M. 28°450 . : 
& ©. 18 30pm 29-174 724 in 24 hours. 
The greatest range in 24 hours, for the entire period of seven 
years, was ‘946, March 28, 1843. Only four cases have occur- 
red in which the fluctuations amounted to ‘8 inch in 24 hours. ~ 
The season of the year in which these maxima, minima, and 
extraordinary fluctuations have occurred during seven years is 
shown in the following table. 
Maxima. Minima. Fluctuations. 
October, 3 2 
November, 5 4 x 
December, 5 6 5 
January, 4 5 8 
February, 2 4 5 
March, 5 4 4 
April, 2 1 1 
May, 0 ye 0 
* About the time of minimum, the column of mercury was very unsteady, 
oscillating through an arc of from -02 to -03 inch. This motion was not due to 
agitation of the tube, but to sudden changes of pressure, and resembled very 
much the respiration of an animal. On the 14th of August, 1843, just at the 
commencement of a shower the barometer oscillated through -073 inch. Cases of 
this kind are not uncommon. 
