METEOROLOGICAL OBSEHVATOEY 



OK THE 



Hatcli Experiment Station, 



MASSACHUSETTS AGRICULTURAL COLLEGE, 



Latitude, 42° 23' 48.5" N. Longitude, 72° 31' 10" W. 



Height of instruments above ground,51ft. Above sea level, 273.5 ft. ** 



BULLETIN No. 96. 



DECEMBER, 1896. 



inONTHLY SUMMARY. 



Pressure. In inclies. [Total movement, 5290 m. 



Actual maximum reading, . 30.(50, 27th, 12 P. Greatest daily movement, . . . 51J m., ICth 



Actual mill, reading, 29.0G, 9th,10 a. Lea.st daily movement 32ni., 2l8t 



Reducedt niaximum I'eading, 30.94. 27ili, 12 I'. .Mean daily movement, 170.6 m. 



Reduci'tlt min. reading, . . . 29.37, 9ili, 10 a. Mean hourly velocity, 7.1m. 



Mean reducedf. 30.133 Maximum pressure per square foot, 12 lbs. = 



Monthly range, l..")? 49 m. per hour, IGth 10-30 A. N.N.VV., 19ih 



* Air Temperature. In Degrees Fahr. I 7 30 A. W.N. W. 



Highest 52.5; 13thi Precipitation. In inches. 



Lowest —9.5, 28th xotal precipitation 0.87 



Mean, 25.3 j^umber of days on which .01 inch or more 



Mean of means of max. and min., . . . .25 rain or melted snow fell, 5 



Mean scnsible(wct bulb) -•5-9 Snow total in inches 3. 



Monthly Range G2. ,.-.,, 



, .> .,,,,, " eat her. 



Ilighest mean daUy 41.3, 13lh! 



Lowest mean daily 7 0, .^4th l^Iean cloudiness observed, . . . 42 per cent. 



Mean maximum, 34.4 Total cloudiness recorded by the Sun Tlier- 



Mean mininuim, Ki 8 mometer, . . .Ill hours or 39 per cent. 



Mean daily range, • • 1'-*' vnmber of clear davs 11 



Greatest dailv range, 32..'>, 2Mh -^"'n"^' '^^ <"®"' "'^^^ \^ 



Least daily ra"nge, 4.0, 23d Number of fair days, 12 



Humidity. ^^ „ Number of cloudy days, 8 



Mean dew point. 

 Mean foi-ce of vapor, 



Mean relative humidity i9.8 



Wind. 



Prevailing Direction, west. 



Summary. 



North 16 per cent. 



North Nmh West, 10 " " 



North West, 10 " " 



West 10 " " 



West Snuth West I'> " " 



South West 10 " " 



Other directions 28 " " 



liright Sunshine. 



Number of Hours recorded, 172 hours or 61* 



Itain, Stb, 9th. 



GalfS,o( 35 or more miles per hour, 42m., 

 9th,S.W.; 37m., lOtli.W.N.W. ;49m., IGih, 

 N.N.W.;46m., 17th, N.N. \V^. ; 49m., I'.ith, 

 W.N.W.; 4.im., 23d, N.; 35m., 24ih, N.; 

 44m., 2Gth, W.;3Gm.. 31st, W. 



Sno^v, 4th, 5lh, 16th 18th, 23cl. 



* Temperature in ground shelter. 



t Reduced to freezing and sea level. 



* * Determined from levels of B. &M. R. R. 



