140 MASS. EXPERIMENT STATION BULLETIN 153. 



Summary for the T^\^enty-five Years 1889-1913, inclusi\t:. 



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 amiual 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, Januar.v, 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, Jime 2, 1907, 2.0 



Humidity. 



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 montlily precipitation, July, 1897, 14.51 



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



Mean montlily precipitation, 3 . 65 



