314 Meteorological Observations at Hudson^ Ohio. 



The following table exhibits the instances in which the 

 barometer has sunk below 28.25. 



The greatest range of the barometer for the three years is 1.607 ; 

 and it appears that, with a few extraordinary exceptions, the 

 oscillations are confined to one inch, the exceptions being but 

 twenty-five in three years. The greatest range at Montreal for 

 fi.ve years is 2.138 ; at New York in seven years, 2.25. If the 

 range of the barometer were proportioned to its absolute height, 

 this would give for Hudson 2.163. At Boston, during a period 

 of twelve years, the range of the barometer is stated at 2.50. It 

 may then be naturally inferred, that for considerable elevations, 

 the range of the barometer diminishes more rapidly than its abso- 

 lute height. 



Fluctuations of the bafvmeter, not corrected for temperature, ear- 

 ceeding .6 inch in twenty four hours. 



Date. 



1833. Feb 



1839. Jan. 



16, 1 p. M 



17, 10 A. M 



March 4, 10 a. m 



5, 6 A. M 



5, 



6, 



6, 

 11, 

 12, 

 28, 

 29, 



Nov. 



Dec 



Feb. 28, 



March 1, 



29, 



30, 



1840. Jan. 23, 



24, 



3 p. M. 



9 A. M. 

 3 P. M 

 3 p. M. 

 3 p. M. 

 9 A. M. 

 6 A. M. 



7, 8 p. M. 



8, 9 A.M. 



21, 3 p.m. 



22, 3 p.m. 

 midnight 



23, 7 a.m. 

 23, 3 p.m. 



3 p.m. 

 9 a. m. 

 9 a. m. 

 9 a. m. 

 2 a.m. 

 9 a. m. 



B;ironi 



28.086 

 •23.766 

 29.064 

 23.378 

 28.327 

 28.921 

 28.935 

 28.449 

 29.050 

 29.008 

 28.314 

 28.437 

 29.046 

 28.808 

 28.305 

 28.288 

 28,800 

 28.931 

 28.188 

 28.802 

 28.535 

 29.243 

 28.301 

 28.939 



Oscillation. 



.680 in 21 hrs. 



.686in20hrs. 



.594 in 18 hrs. 

 .608 in 24 hrs. 



.601 in 24 hrs. 



694 in 21 hrs. 



.609 in 13 hrs. 



.503 in 24 hrs. 



.512in 7hrs. 

 .643 in 15 hrs. 



.614 in 18 hrs. 



.708 in 24 hrs. 



.633 in 31 hrs. 



1840. Jan. 



Feb. 



March 



April 

 Dec. 



1841. Jan. 



9 a. m. 



7 A. M. 



9 a. m. 



9 A. M. 

 3 P.M. 

 9 A. M. 



3 p. M. 

 3 p. M. 

 9 A. M. 

 9 A. M. 

 3 p. M. 

 9 A. M. 

 ll.iA.M. 

 3 P.M. 

 9 A.M. 

 9 A. M. 

 9 A. M. 

 9 A. M. 



8 A. M. 



9 A. M. 

 9 A. M. 

 9 A. M. 



Bm-om 



28.634 



28.038 



23.043 



28.91 



28.596 



29.123 



29.092 



28.381 



29.164 



28.850 



23.736 



23.037 



27.953 



23.073 



28.567 



28.532 



29.197 



28.816 



28.035 



23.716 



28.594 



29.306 



Oscillation. 



.596 in 22 hrs 

 ,874 in 24 hrs 

 527 in 18 hrs 



,711 in 24 hrs 



.783 in 18 hrs 



813 in 24 hrs, 

 699 in 18 hrs, 



614 in 21 hrs 



665 in 24 hrs, 



781 in 23 hrs, 

 681 in 25 hrs. 



712 in 24 hrs. 



The greatest range in twenty-four hours was .874, Jan. 30, 

 1840 ; but the most remarkable motion of all was that on the 

 23d of January, 1839, .512 in seven hours. It was accompanied 

 by a most violent wind from the north, and a heavy snow. It 



