140 MASS. EXPERIMENT STATION BULLETIN 153. 



Summary for the Twenty-five Years 1889-1913, inclusive. 



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, 



11 A.M., 30.970 



Minimum reduced to freezing and sea level, Jan. 3, 1913, 7 a.m., 28.550 



Mean, 30.012 



Total range, 2.420 



Greatest annual range, 1913, 2.330 



Least annual range, 1905, 1 . 640 



Mean annual range, 1 . 890 



Greatest monthly range, January, 1913, 2 . 180 



Least monthly range, August, 1894, .440 



Mean monthly range, 1 . 100 



Air Temperature {in Degrees F.). 



Highest, July 4, 1911, 3.30 P.M., 104.0 



Lowest, Jan. 5, 1904, 7.30 A.M., -26.0 



Mean, 47.5 



Total range, 130.0 



Greatest annual range, 1904, 120 . 5 



Least annual range, 1906, 98.5 



Mean annual range, 107 . 6 



Greatest montlily range, January, 1907, 78.0 



Least montlily range, August, 1901, 33.5 



Mean monthly range, 54 . 6 



Greatest daily range, Dec. 10, 1902, 54.0 



Least daily range, June 2, 1907, 2.0 



Humidify. 



Mean dew point, . . 39 . 



Mean relative humidity, 74 . 6 



Precipitation {in Inches). 



Total rain or melted snow, 1,093.91 



Total snowfaU, 1,190.70 



Greatest annual precipitation, 1897, 57.05 



Least annual precipitation, 1908, 30.68 



Mean annual precipitation, 43 . 76 



Greatest monthly precipitation, July, 1897, 14 . 51 



Least monthly precipitation, August, 1894, . . . . . .31 



Mean monthly precipitation, 3 . 65 



