Annual Summary for 1900. 



Pressure. In inches. 



Maximum reduced to freezing, 30.42, Feb. 2Sth, 7 A. 



Minimum reduced to freezing, ■ . . 28.55, Feb. 25th, 4 A. 



Maximum reduced to freezing and sea-level, 30.75, Feb. zSth, 7 A. • 



Minimum reduced to freezing and sea-level, . 28.86, Feb. 25th, 4 A. 



Mean reduced to freezing and sea-level, 29.985 



Annual range, 1.89 



*Air Temperature. In degrees Falir. 



Highest, 96.0, Aug. 6th, 5:30 p. 



Lowest, . . • —8.0, Feb. 3rd, 6:30 A. 



Mean, 4S.3 



Mean of means of max. and min 4S.1 



Mean sensible (wet bulb) •45-0 



Annual range, 104.0 



Highest mean daily S4.0, July 17th. 



Lowest mean daily, 3.4, Feb. 2d. 



Mean maximum, 59.1 



Mean minimum, 37.3 



Mean daily range, 21. 8 



Greatest daily range, 47.5. May 27th. 



Least daily range, 2.5 May igth. 



Humidity . 



Mean dew point, 39.2 



Mean force of vapor, 436 



Mean relative humidity, 72.3 



Wind. 



Prevailing direction, West. 



Summary. 



Northwest, 13 per cent 



North, 12 " " ' 



Southwest, II " " 



South 10 " " 



West, 10 '• " 



Other directions, 42 " " 



Total movement, 50503 m. 



Greatest daily movement, . . . 435 m., Feb. 26th. 



Least daily movement i m., Nov. 29th. 



Mean daily movement 13S.4 m. 



Mean hourly velocity, 5.8 m. 



Maximum pressure per square foot, 30.5 lbs.=78 

 m. per hour, Feb. 25th, 11:00 p., W.N.W. 



Precipitation. In inches. 

 Total precipitation, rain or melted snow, . 51.67 

 Number of days on which .01 or more rain 



or melted snow fell, 131 



Snow total in inches, 37.0 



Weather. 



Mean cloudiness observed 55 per cent. 



Total cloudiness recorded by Sun Thermom- 

 eter, 2238=50 per cent. 



Number of clear days, 83 



Number of fair days, 144 



Number of cloudy days 138 



Priffht Sunshine. 



Number of hours recorded, . . 2216^50 per cent 



Dates of Frosts. 



Last May 29th. 



First, Sept. 15th. 



Dates of Snoiv. 



Last, Apr. 9th. 



First, Nov. 9th. 



Total days of sleighing 27 



Oales of 50 or More Miles Per Hour. 



Jan. 64 m., 26th, N.W.; 55 m., 27th, N.W. 



Feb. 53 m., 5th, N.: 55m., 13th, N.W.; 50 m., 



14th, N.W., 52 m., 22d, N.E.; 78 m., 25th, 



W.N.W.; 51 m., 26th, N.W. 

 Mar. 57 m., 2nd, N.W.; 53 m., 4th, N.W. 

 Apr. 50 m., ist, W.N.W.; 51 m., 26th, N.N.E. 

 May. 52 m., ist, N.W., 66 m., 5th, N.W. 

 June. 50 m., 30th, N.W. 

 July. 68 m., 7th, S.W. 

 Aug. 57 m., 6th, N.N. W. 

 Sept. 60 m., i2th, S.W. 



Nov. 58 m.. 9th, N.N.W.: 60 m.. loth, N.N. W. 

 Dec. 51 m., 9th, S.S.W. 



I 



^Temperature in ground shelter. 



