21 



Summary for the Twenty Years i88g-igo8. 



Barometer (Pressure in Inches). 



Maximum, reduced to freezing, Feb. 26, 1889., 11 a. m 30.650 



Minimum, reduced to freezing, Feb. 8, 1895, 7 a. m 28.240 



Maximum, reduced to freezing and sea level, Feb. 26, 1889, 



1 1 A. M 30.970 



Minimum, reduced to freezing and sea level, Feb. 8, 1895, 



7 A. M 28.560 



Mean 30.009 



Total range 2.410 



Greatest annual range, 1895 • • • 2.270 



Least annual range, 1905 1.640 



Mean annual range 1.880 



Greatest monthly range, January, 1891 i-93o 



Least monthly range, August, 1894 440 



Mean monthly range i.ioo 



Air Temperature (in Degrees F.) 



Highest, July 2, 1901, 1:30 p. m loo-S 



Lowest, Jan. 5, 1904, 7:30 a. m -26.0 



Mean 46.8 



Total range 126.5 



Greatest annual range, 1903 120.5 



Least annual range, 1905 98.5 



Mean annual range 108.9 



Greatest monthly range, Jan., 1907 78.0 



Least monthly range, Aug., 1901 33-5 



Mean monthly range 54.8 



Greatest daily range, Dec. 10, 1902 54.0 



Least daily range, June 2, 1907 2.0 



Humidity. 



Mean dew point . . 39.1 



Mean relative humidity 74.1 



