p. D. 31 



13a 



METEOROLOGICAL OBSERVATION. 



Department of Meteorology. 

 PROF. J. E. OSTRANDER. HEAD 



ANNUAL SUMMARY FOR 1925. 



Pressure (in Inches) 

 Maximum reduced to freezing 

 Minimum reduced to freezing 

 Maximum reduced to freezing and sea-level 

 Minimum reduced to freezing and sea-level 

 Mean semi-daily reduced to freezing and sea-level 

 Annual range ...... 



30.44 Jan. 2nd, 9 A. 

 28.88, Dec. 13th, 7 P. 

 30.77, Jan. 2nd, 9 a. 

 29.19, Dec. 13th, 7 p. 

 30.010 

 . 1.58 



♦AiB Temper.\ture (in Degrees Fahr.) 



Highest 97.0, Aug. 7th, 1 :00 p. 



LovFest -8.0, Jan. 27th 6 :00 a. 



Jan. 28th, 6 .00 A. 



Mean hourly 46.6 



Mean of means of max. and min .... 46.7 



Mean sensible (wet bulb) 41.0 



Annual range 10.5.0 



Highest mean daily 78.8, Aug. 7th 



Lowest mean daily -0.3. Jan. 27th. 



Mean maximum 57.8 



Mean minimum 35.7 



Mean daily range 22.1 



Greatest daily range. .43.5, Oct. 23tA., 24th. 



Least daily range 3.0, Feb. 5th. 



Humidity 



Mean dew point 36^ 



Mean force of vapor 362 



Mean relative humidity 73.9 



Wind 



Prevailing direction West 



Summary 



North 10 per cent 



North Northeast 9 per cent 



South 9 per cent 



South Southwest 19 per cent 



Northwest 9 per cent 



Other directions 41 per cent 



Total movement 53.855 m 



Greatest daily movement. .553m., Mar. 12th 



Least daily movement 22 m., Dec. 12th 



Mean daily movement 147 m 



Mean hourly velocity 6.1 m 



Maximum pressure per square foot, 23.5 lbs., 



= 69 m. per hour, Apr. 14th, 3 p., N. W. 

 Maximum velocity for 5 minutes, 42 m. per 



hour, July 13th, 1 p., S. W. 

 •Temperature in ground shelter. 



Precipitation (in Inches) 



Total precipitation, rain or melted snow 



30.96 



Snow total in inches 45.0 



Number of days on which .01 or more 



rain or melted snow fell 96 



Weather 



Mean cloudiness observed 41 per cent 



Total cloudiness recorded by Sun Ther- 

 mometer 1637 hrs. = 37 per cent. 



Number of clear days 141 



Number of fair days 145 



Number of cloudy days 80 



Bright Sunshine 



Number of hours recorded, 2838 hrs. = 63 

 per cent. 



Dates of Frosts 



Last May 2d 



First Sept. 24th 



Dates op Snow 



Last April 8th 



First Nov. 9th 



Total days of sleighing 54 



Gales of 50 or More Miles Pek Houe 



Jan. 1st. 58m. N. W. : 11th, 67m. S.S.E. ; 



21st, 63m, N.W. ; 26th, 56m, N.W. 

 Mar. 11th, 57m. N.E. ; 12th, 63m, N.N.E. ; 



28th, 59m, W.N.W. 

 Apr. 14th, 69m. N.W. ; 51m, 24th, N.N.W. 

 May 18th, 52m, S. 

 July 13th, 56m, S.W. 

 Nov. 17th, 55m, N.N.W. 



REPORT OF THE TREASURER 



F. C. KEN NET 



United States Appropriation, 1923-24. 



Dr. Hatch Fund. Adams Fund. 

 To receipts from the Treasurer of the United States, 

 as per appropriations for fiscal year ended June 

 30, 1924, under acts of Congress approved March 2, 

 1887 and March 16, 1906 $15,000.00 $15,000.00 



